Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull irq code updates from Thomas Gleixner:
 "The irq department proudly presents:

   - Another tree wide sweep of irq infrastructure abuse.  Clear winner
     of the trainwreck engineering contest was:
         #include "../../../kernel/irq/settings.h"

   - Tree wide update of irq_set_affinity() callbacks which miss a cpu
     online check when picking a single cpu out of the affinity mask.

   - Tree wide consolidation of interrupt statistics.

   - Updates to the threaded interrupt infrastructure to allow explicit
     wakeup of the interrupt thread and a variant of synchronize_irq()
     which synchronizes only the hard interrupt handler.  Both are
     needed to replace the homebrewn thread handling in the mmc/sdhci
     code.

   - New irq chip callbacks to allow proper support for GPIO based irqs.
     The GPIO based interrupts need to request/release GPIO resources
     from request/free_irq.

   - A few new ARM interrupt chips.  No revolutionary new hardware, just
     differently wreckaged variations of the scheme.

   - Small improvments, cleanups and updates all over the place"

I was hoping that that trainwreck engineering contest was a April Fools'
joke.  But no.

* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (68 commits)
  irqchip: sun7i/sun6i: Disable NMI before registering the handler
  ARM: sun7i/sun6i: dts: Fix IRQ number for sun6i NMI controller
  ARM: sun7i/sun6i: irqchip: Update the documentation
  ARM: sun7i/sun6i: dts: Add NMI irqchip support
  ARM: sun7i/sun6i: irqchip: Add irqchip driver for NMI controller
  genirq: Export symbol no_action()
  arm: omap: Fix typo in ams-delta-fiq.c
  m68k: atari: Fix the last kernel_stat.h fallout
  irqchip: sun4i: Simplify sun4i_irq_ack
  irqchip: sun4i: Use handle_fasteoi_irq for all interrupts
  genirq: procfs: Make smp_affinity values go+r
  softirq: Add linux/irq.h to make it compile again
  m68k: amiga: Add linux/irq.h to make it compile again
  irqchip: sun4i: Don't ack IRQs > 0, fix acking of IRQ 0
  irqchip: sun4i: Fix a comment about mask register initialization
  irqchip: sun4i: Fix irq 0 not working
  genirq: Add a new IRQCHIP_EOI_THREADED flag
  genirq: Document IRQCHIP_ONESHOT_SAFE flag
  ARM: sunxi: dt: Convert to the new irq controller compatibles
  irqchip: sunxi: Change compatibles
  ...

82 files changed, 705 insertions, 393 deletions

diff --git a/Documentation/devicetree/bindings/arm/armada-370-xp-mpic.txt b/Documentation/devicetree/bindings/arm/armada-370-xp-mpic.txt
index d74091a8a3bf..5fc03134a999 100644
--- a/Documentation/devicetree/bindings/arm/armada-370-xp-mpic.txt
+++ b/Documentation/devicetree/bindings/arm/armada-370-xp-mpic.txt
@@ -1,4 +1,4 @@
-Marvell Armada 370 and Armada XP Interrupt Controller
+Marvell Armada 370, 375, 38x, XP Interrupt Controller
 -----------------------------------------------------
 
 Required properties:
@@ -16,7 +16,13 @@ Required properties:
   automatically map to the interrupt controller registers of the
   current CPU)
 
+Optional properties:
 
+- interrupts: If defined, then it indicates that this MPIC is
+  connected as a slave to another interrupt controller. This is
+  typically the case on Armada 375 and Armada 38x, where the MPIC is
+  connected as a slave to the Cortex-A9 GIC. The provided interrupt
+  indicate to which GIC interrupt the MPIC output is connected.
 
 Example:
 
diff --git a/Documentation/devicetree/bindings/interrupt-controller/allwinner,sun4i-ic.txt b/Documentation/devicetree/bindings/interrupt-controller/allwinner,sun4i-ic.txt
index 32cec4b26cd0..b290ca150d30 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/allwinner,sun4i-ic.txt
+++ b/Documentation/devicetree/bindings/interrupt-controller/allwinner,sun4i-ic.txt
@@ -2,7 +2,7 @@ Allwinner Sunxi Interrupt Controller
 
 Required properties:
 
-- compatible : should be "allwinner,sun4i-ic"
+- compatible : should be "allwinner,sun4i-a10-ic"
 - reg : Specifies base physical address and size of the registers.
 - interrupt-controller : Identifies the node as an interrupt controller
 - #interrupt-cells : Specifies the number of cells needed to encode an
@@ -11,7 +11,7 @@ Required properties:
 Example:
 
 intc: interrupt-controller {
-        compatible = "allwinner,sun4i-ic";
+        compatible = "allwinner,sun4i-a10-ic";
         reg = <0x01c20400 0x400>;
         interrupt-controller;
         #interrupt-cells = <1>;
diff --git a/Documentation/devicetree/bindings/interrupt-controller/allwinner,sun67i-sc-nmi.txt b/Documentation/devicetree/bindings/interrupt-controller/allwinner,sun67i-sc-nmi.txt
new file mode 100644
index 000000000000..d1c5cdabc3e0
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/allwinner,sun67i-sc-nmi.txt
@@ -0,0 +1,27 @@
+Allwinner Sunxi NMI Controller
+==============================
+
+Required properties:
+
+- compatible : should be "allwinner,sun7i-a20-sc-nmi" or
+  "allwinner,sun6i-a31-sc-nmi"
+- reg : Specifies base physical address and size of the registers.
+- interrupt-controller : Identifies the node as an interrupt controller
+- #interrupt-cells : Specifies the number of cells needed to encode an
+  interrupt source. The value shall be 2. The first cell is the IRQ number, the
+  second cell the trigger type as defined in interrupt.txt in this directory.
+- interrupt-parent: Specifies the parent interrupt controller.
+- interrupts: Specifies the interrupt line (NMI) which is handled by
+  the interrupt controller in the parent controller's notation. This value
+  shall be the NMI.
+
+Example:
+
+sc-nmi-intc@01c00030 {
+        compatible = "allwinner,sun7i-a20-sc-nmi";
+        interrupt-controller;
+        #interrupt-cells = <2>;
+        reg = <0x01c00030 0x0c>;
+        interrupt-parent = <&gic>;
+        interrupts = <0 0 4>;
+};
diff --git a/arch/arm/boot/dts/sun4i-a10.dtsi b/arch/arm/boot/dts/sun4i-a10.dtsi
index 2ce61228d5f9..249b6e0ba737 100644
--- a/arch/arm/boot/dts/sun4i-a10.dtsi
+++ b/arch/arm/boot/dts/sun4i-a10.dtsi
@@ -331,7 +331,7 @@
                 };
 
                 intc: interrupt-controller@01c20400 {
-                        compatible = "allwinner,sun4i-ic";
+                        compatible = "allwinner,sun4i-a10-ic";
                         reg = <0x01c20400 0x400>;
                         interrupt-controller;
                         #interrupt-cells = <1>;
diff --git a/arch/arm/boot/dts/sun5i-a10s.dtsi b/arch/arm/boot/dts/sun5i-a10s.dtsi
index 29dd32d8e77e..ddb25452d78e 100644
--- a/arch/arm/boot/dts/sun5i-a10s.dtsi
+++ b/arch/arm/boot/dts/sun5i-a10s.dtsi
@@ -294,7 +294,7 @@
                 };
 
                 intc: interrupt-controller@01c20400 {
-                        compatible = "allwinner,sun4i-ic";
+                        compatible = "allwinner,sun4i-a10-ic";
                         reg = <0x01c20400 0x400>;
                         interrupt-controller;
                         #interrupt-cells = <1>;
diff --git a/arch/arm/boot/dts/sun5i-a13.dtsi b/arch/arm/boot/dts/sun5i-a13.dtsi
index e63bb383b43d..b373c74a9b3d 100644
--- a/arch/arm/boot/dts/sun5i-a13.dtsi
+++ b/arch/arm/boot/dts/sun5i-a13.dtsi
@@ -275,7 +275,7 @@
                 ranges;
 
                 intc: interrupt-controller@01c20400 {
-                        compatible = "allwinner,sun4i-ic";
+                        compatible = "allwinner,sun4i-a10-ic";
                         reg = <0x01c20400 0x400>;
                         interrupt-controller;
                         #interrupt-cells = <1>;
diff --git a/arch/arm/boot/dts/sun6i-a31.dtsi b/arch/arm/boot/dts/sun6i-a31.dtsi
index 996fff54c8a2..38d43febda4c 100644
--- a/arch/arm/boot/dts/sun6i-a31.dtsi
+++ b/arch/arm/boot/dts/sun6i-a31.dtsi
@@ -190,6 +190,14 @@
                 #size-cells = <1>;
                 ranges;
 
+                nmi_intc: interrupt-controller@01f00c0c {
+                        compatible = "allwinner,sun6i-a31-sc-nmi";
+                        interrupt-controller;
+                        #interrupt-cells = <2>;
+                        reg = <0x01f00c0c 0x38>;
+                        interrupts = <0 32 4>;
+                };
+
                 pio: pinctrl@01c20800 {
                         compatible = "allwinner,sun6i-a31-pinctrl";
                         reg = <0x01c20800 0x400>;
diff --git a/arch/arm/boot/dts/sun7i-a20.dtsi b/arch/arm/boot/dts/sun7i-a20.dtsi
index dddc8ac2d522..cadcf2f9881d 100644
--- a/arch/arm/boot/dts/sun7i-a20.dtsi
+++ b/arch/arm/boot/dts/sun7i-a20.dtsi
@@ -339,6 +339,14 @@
                 #size-cells = <1>;
                 ranges;
 
+                nmi_intc: interrupt-controller@01c00030 {
+                        compatible = "allwinner,sun7i-a20-sc-nmi";
+                        interrupt-controller;
+                        #interrupt-cells = <2>;
+                        reg = <0x01c00030 0x0c>;
+                        interrupts = <0 0 4>;
+                };
+
                 emac: ethernet@01c0b000 {
                         compatible = "allwinner,sun4i-a10-emac";
                         reg = <0x01c0b000 0x1000>;
diff --git a/arch/arm/mach-imx/pm-imx6q.c b/arch/arm/mach-imx/pm-imx6q.c
index 7a9b98589db7..29e3fe6a6669 100644
--- a/arch/arm/mach-imx/pm-imx6q.c
+++ b/arch/arm/mach-imx/pm-imx6q.c
@@ -120,7 +120,7 @@ static void imx6q_enable_wb(bool enable)
 
 int imx6q_set_lpm(enum mxc_cpu_pwr_mode mode)
 {
-        struct irq_desc *iomuxc_irq_desc;
+        struct irq_data *iomuxc_irq_data = irq_get_irq_data(32);
         u32 val = readl_relaxed(ccm_base + CLPCR);
 
         val &= ~BM_CLPCR_LPM;
@@ -167,10 +167,9 @@ int imx6q_set_lpm(enum mxc_cpu_pwr_mode mode)
          * 3) Software should mask IRQ #32 right after CCM Low-Power mode
          *    is set (set bits 0-1 of CCM_CLPCR).
          */
-        iomuxc_irq_desc = irq_to_desc(32);
-        imx_gpc_irq_unmask(&iomuxc_irq_desc->irq_data);
+        imx_gpc_irq_unmask(iomuxc_irq_data);
         writel_relaxed(val, ccm_base + CLPCR);
-        imx_gpc_irq_mask(&iomuxc_irq_desc->irq_data);
+        imx_gpc_irq_mask(iomuxc_irq_data);
 
         return 0;
 }
diff --git a/arch/arm/mach-mmp/pm-mmp2.c b/arch/arm/mach-mmp/pm-mmp2.c
index 461a191a32d2..43b1a516957f 100644
--- a/arch/arm/mach-mmp/pm-mmp2.c
+++ b/arch/arm/mach-mmp/pm-mmp2.c
@@ -27,22 +27,8 @@
 
 int mmp2_set_wake(struct irq_data *d, unsigned int on)
 {
-        int irq = d->irq;
-        struct irq_desc *desc = irq_to_desc(irq);
         unsigned long data = 0;
-
-        if (unlikely(irq >= nr_irqs)) {
-                pr_err("IRQ nubmers are out of boundary!\n");
-                return -EINVAL;
-        }
-
-        if (on) {
-                if (desc->action)
-                        desc->action->flags |= IRQF_NO_SUSPEND;
-        } else {
-                if (desc->action)
-                        desc->action->flags &= ~IRQF_NO_SUSPEND;
-        }
+        int irq = d->irq;
 
         /* enable wakeup sources */
         switch (irq) {
diff --git a/arch/arm/mach-mmp/pm-pxa910.c b/arch/arm/mach-mmp/pm-pxa910.c
index 48981ca801a5..04c9daf9f8d7 100644
--- a/arch/arm/mach-mmp/pm-pxa910.c
+++ b/arch/arm/mach-mmp/pm-pxa910.c
@@ -27,22 +27,8 @@
 
 int pxa910_set_wake(struct irq_data *data, unsigned int on)
 {
-        int irq = data->irq;
-        struct irq_desc *desc = irq_to_desc(data->irq);
         uint32_t awucrm = 0, apcr = 0;
-
-        if (unlikely(irq >= nr_irqs)) {
-                pr_err("IRQ nubmers are out of boundary!\n");
-                return -EINVAL;
-        }
-
-        if (on) {
-                if (desc->action)
-                        desc->action->flags |= IRQF_NO_SUSPEND;
-        } else {
-                if (desc->action)
-                        desc->action->flags &= ~IRQF_NO_SUSPEND;
-        }
+        int irq = data->irq;
 
         /* setting wakeup sources */
         switch (irq) {
@@ -115,9 +101,11 @@ int pxa910_set_wake(struct irq_data *data, unsigned int on)
                 if (irq >= IRQ_GPIO_START && irq < IRQ_BOARD_START) {
                         awucrm = MPMU_AWUCRM_WAKEUP(2);
                         apcr |= MPMU_APCR_SLPWP2;
-                } else
+                } else {
+                        /* FIXME: This should return a proper error code ! */
                         printk(KERN_ERR "Error: no defined wake up source irq: %d\n",
                                 irq);
+                }
         }
 
         if (on) {
diff --git a/arch/arm/mach-omap1/ams-delta-fiq.c b/arch/arm/mach-omap1/ams-delta-fiq.c
index f12a12af3523..d1f12095f315 100644
--- a/arch/arm/mach-omap1/ams-delta-fiq.c
+++ b/arch/arm/mach-omap1/ams-delta-fiq.c
@@ -44,13 +44,10 @@ static unsigned int irq_counter[16];
 
 static irqreturn_t deferred_fiq(int irq, void *dev_id)
 {
-        struct irq_desc *irq_desc;
-        struct irq_chip *irq_chip = NULL;
         int gpio, irq_num, fiq_count;
+        struct irq_chip *irq_chip;
 
-        irq_desc = irq_to_desc(gpio_to_irq(AMS_DELTA_GPIO_PIN_KEYBRD_CLK));
-        if (irq_desc)
-                irq_chip = irq_desc->irq_data.chip;
+        irq_chip = irq_get_chip(gpio_to_irq(AMS_DELTA_GPIO_PIN_KEYBRD_CLK));
 
         /*
          * For each handled GPIO interrupt, keep calling its interrupt handler
diff --git a/arch/ia64/kernel/irq_ia64.c b/arch/ia64/kernel/irq_ia64.c
index 1034884b77da..0884f5ecbcc3 100644
--- a/arch/ia64/kernel/irq_ia64.c
+++ b/arch/ia64/kernel/irq_ia64.c
@@ -364,7 +364,6 @@ static irqreturn_t smp_irq_move_cleanup_interrupt(int irq, void *dev_id)
 
 static struct irqaction irq_move_irqaction = {
         .handler =      smp_irq_move_cleanup_interrupt,
-        .flags =        IRQF_DISABLED,
         .name =         "irq_move"
 };
 
@@ -489,14 +488,13 @@ ia64_handle_irq (ia64_vector vector, struct pt_regs *regs)
         ia64_srlz_d();
         while (vector != IA64_SPURIOUS_INT_VECTOR) {
                 int irq = local_vector_to_irq(vector);
-                struct irq_desc *desc = irq_to_desc(irq);
 
                 if (unlikely(IS_LOCAL_TLB_FLUSH(vector))) {
                         smp_local_flush_tlb();
-                        kstat_incr_irqs_this_cpu(irq, desc);
+                        kstat_incr_irq_this_cpu(irq);
                 } else if (unlikely(IS_RESCHEDULE(vector))) {
                         scheduler_ipi();
-                        kstat_incr_irqs_this_cpu(irq, desc);
+                        kstat_incr_irq_this_cpu(irq);
                 } else {
                         ia64_setreg(_IA64_REG_CR_TPR, vector);
                         ia64_srlz_d();
@@ -549,13 +547,12 @@ void ia64_process_pending_intr(void)
           */
         while (vector != IA64_SPURIOUS_INT_VECTOR) {
                 int irq = local_vector_to_irq(vector);
-                struct irq_desc *desc = irq_to_desc(irq);
 
                 if (unlikely(IS_LOCAL_TLB_FLUSH(vector))) {
                         smp_local_flush_tlb();
-                        kstat_incr_irqs_this_cpu(irq, desc);
+                        kstat_incr_irq_this_cpu(irq);
                 } else if (unlikely(IS_RESCHEDULE(vector))) {
-                        kstat_incr_irqs_this_cpu(irq, desc);
+                        kstat_incr_irq_this_cpu(irq);
                 } else {
                         struct pt_regs *old_regs = set_irq_regs(NULL);
 
@@ -602,7 +599,6 @@ static irqreturn_t dummy_handler (int irq, void *dev_id)
 
 static struct irqaction ipi_irqaction = {
         .handler =      handle_IPI,
-        .flags =        IRQF_DISABLED,
         .name =         "IPI"
 };
 
@@ -611,13 +607,11 @@ static struct irqaction ipi_irqaction = {
  */
 static struct irqaction resched_irqaction = {
         .handler =      dummy_handler,
-        .flags =        IRQF_DISABLED,
         .name =         "resched"
 };
 
 static struct irqaction tlb_irqaction = {
         .handler =      dummy_handler,
-        .flags =        IRQF_DISABLED,
         .name =         "tlb_flush"
 };
 
diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index 601502ab7141..db7b36bb068b 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -1772,38 +1772,32 @@ __setup("disable_cpe_poll", ia64_mca_disable_cpe_polling);
 
 static struct irqaction cmci_irqaction = {
         .handler =      ia64_mca_cmc_int_handler,
-        .flags =        IRQF_DISABLED,
         .name =         "cmc_hndlr"
 };
 
 static struct irqaction cmcp_irqaction = {
         .handler =      ia64_mca_cmc_int_caller,
-        .flags =        IRQF_DISABLED,
         .name =         "cmc_poll"
 };
 
 static struct irqaction mca_rdzv_irqaction = {
         .handler =      ia64_mca_rendez_int_handler,
-        .flags =        IRQF_DISABLED,
         .name =         "mca_rdzv"
 };
 
 static struct irqaction mca_wkup_irqaction = {
         .handler =      ia64_mca_wakeup_int_handler,
-        .flags =        IRQF_DISABLED,
         .name =         "mca_wkup"
 };
 
 #ifdef CONFIG_ACPI
 static struct irqaction mca_cpe_irqaction = {
         .handler =      ia64_mca_cpe_int_handler,
-        .flags =        IRQF_DISABLED,
         .name =         "cpe_hndlr"
 };
 
 static struct irqaction mca_cpep_irqaction = {
         .handler =      ia64_mca_cpe_int_caller,
-        .flags =        IRQF_DISABLED,
         .name =         "cpe_poll"
 };
 #endif /* CONFIG_ACPI */
diff --git a/arch/ia64/kernel/msi_ia64.c b/arch/ia64/kernel/msi_ia64.c
index fb2f1e622877..c430f9198d1b 100644
--- a/arch/ia64/kernel/msi_ia64.c
+++ b/arch/ia64/kernel/msi_ia64.c
@@ -17,12 +17,9 @@ static int ia64_set_msi_irq_affinity(struct irq_data *idata,
 {
         struct msi_msg msg;
         u32 addr, data;
-        int cpu = first_cpu(*cpu_mask);
+        int cpu = cpumask_first_and(cpu_mask, cpu_online_mask);
         unsigned int irq = idata->irq;
 
-        if (!cpu_online(cpu))
-                return -1;
-
         if (irq_prepare_move(irq, cpu))
                 return -1;
 
@@ -139,10 +136,7 @@ static int dmar_msi_set_affinity(struct irq_data *data,
         unsigned int irq = data->irq;
         struct irq_cfg *cfg = irq_cfg + irq;
         struct msi_msg msg;
-        int cpu = cpumask_first(mask);
-
-        if (!cpu_online(cpu))
-                return -1;
+        int cpu = cpumask_first_and(mask, cpu_online_mask);
 
         if (irq_prepare_move(irq, cpu))
                 return -1;
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index cb592773c78b..d841c4bd6864 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -6387,7 +6387,6 @@ pfm_flush_pmds(struct task_struct *task, pfm_context_t *ctx)
 
 static struct irqaction perfmon_irqaction = {
         .handler = pfm_interrupt_handler,
-        .flags   = IRQF_DISABLED,
         .name    = "perfmon"
 };
 
diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c
index fbaac1afb844..71c52bc7c28d 100644
--- a/arch/ia64/kernel/time.c
+++ b/arch/ia64/kernel/time.c
@@ -380,7 +380,7 @@ static cycle_t itc_get_cycles(struct clocksource *cs)
 
 static struct irqaction timer_irqaction = {
         .handler =      timer_interrupt,
-        .flags =        IRQF_DISABLED | IRQF_IRQPOLL,
+        .flags =        IRQF_IRQPOLL,
         .name =         "timer"
 };
 
diff --git a/arch/ia64/sn/kernel/irq.c b/arch/ia64/sn/kernel/irq.c
index 62cf4dde6a04..85d095154902 100644
--- a/arch/ia64/sn/kernel/irq.c
+++ b/arch/ia64/sn/kernel/irq.c
@@ -209,8 +209,8 @@ static int sn_set_affinity_irq(struct irq_data *data,
         nasid_t nasid;
         int slice;
 
-        nasid = cpuid_to_nasid(cpumask_first(mask));
-        slice = cpuid_to_slice(cpumask_first(mask));
+        nasid = cpuid_to_nasid(cpumask_first_and(mask, cpu_online_mask));
+        slice = cpuid_to_slice(cpumask_first_and(mask, cpu_online_mask));
 
         list_for_each_entry_safe(sn_irq_info, sn_irq_info_safe,
                                  sn_irq_lh[irq], list)
diff --git a/arch/ia64/sn/kernel/msi_sn.c b/arch/ia64/sn/kernel/msi_sn.c
index 2b98b9e088de..afc58d2799ad 100644
--- a/arch/ia64/sn/kernel/msi_sn.c
+++ b/arch/ia64/sn/kernel/msi_sn.c
@@ -166,7 +166,7 @@ static int sn_set_msi_irq_affinity(struct irq_data *data,
         struct sn_pcibus_provider *provider;
         unsigned int cpu, irq = data->irq;
 
-        cpu = cpumask_first(cpu_mask);
+        cpu = cpumask_first_and(cpu_mask, cpu_online_mask);
         sn_irq_info = sn_msi_info[irq].sn_irq_info;
         if (sn_irq_info == NULL || sn_irq_info->irq_int_bit >= 0)
                 return -1;
diff --git a/arch/m68k/amiga/cia.c b/arch/m68k/amiga/cia.c
index 18c0e29976e3..2081b8cd5591 100644
--- a/arch/m68k/amiga/cia.c
+++ b/arch/m68k/amiga/cia.c
@@ -18,6 +18,7 @@
 #include <linux/init.h>
 #include <linux/seq_file.h>
 #include <linux/interrupt.h>
+#include <linux/irq.h>
 
 #include <asm/irq.h>
 #include <asm/amigahw.h>
diff --git a/arch/m68k/atari/ataints.c b/arch/m68k/atari/ataints.c
index 3e73a63c066f..3d2b63bedf05 100644
--- a/arch/m68k/atari/ataints.c
+++ b/arch/m68k/atari/ataints.c
@@ -41,6 +41,7 @@
 #include <linux/init.h>
 #include <linux/seq_file.h>
 #include <linux/module.h>
+#include <linux/irq.h>
 
 #include <asm/traps.h>
 
diff --git a/arch/m68k/kernel/ints.c b/arch/m68k/kernel/ints.c
index 077d3a70fed1..5b8d66fbf383 100644
--- a/arch/m68k/kernel/ints.c
+++ b/arch/m68k/kernel/ints.c
@@ -10,9 +10,9 @@
 #include <linux/types.h>
 #include <linux/sched.h>
 #include <linux/interrupt.h>
-#include <linux/kernel_stat.h>
 #include <linux/errno.h>
 #include <linux/init.h>
+#include <linux/irq.h>
 
 #include <asm/setup.h>
 #include <asm/irq.h>
diff --git a/arch/mips/kernel/smtc.c b/arch/mips/kernel/smtc.c
index dfc1b911be04..c1681d65dd5c 100644
--- a/arch/mips/kernel/smtc.c
+++ b/arch/mips/kernel/smtc.c
@@ -1007,7 +1007,7 @@ static void __irq_entry smtc_clock_tick_interrupt(void)
         int irq = MIPS_CPU_IRQ_BASE + 1;
 
         irq_enter();
-        kstat_incr_irqs_this_cpu(irq, irq_to_desc(irq));
+        kstat_incr_irq_this_cpu(irq);
         cd = &per_cpu(mips_clockevent_device, cpu);
         cd->event_handler(cd);
         irq_exit();
diff --git a/arch/mips/sgi-ip22/ip22-int.c b/arch/mips/sgi-ip22/ip22-int.c
index 3db64d51798d..58b40ae59335 100644
--- a/arch/mips/sgi-ip22/ip22-int.c
+++ b/arch/mips/sgi-ip22/ip22-int.c
@@ -148,7 +148,7 @@ static void __irq_entry indy_buserror_irq(void)
         int irq = SGI_BUSERR_IRQ;
 
         irq_enter();
-        kstat_incr_irqs_this_cpu(irq, irq_to_desc(irq));
+        kstat_incr_irq_this_cpu(irq);
         ip22_be_interrupt(irq);
         irq_exit();
 }
diff --git a/arch/mips/sgi-ip22/ip22-time.c b/arch/mips/sgi-ip22/ip22-time.c
index 607192449335..045aa89f28d8 100644
--- a/arch/mips/sgi-ip22/ip22-time.c
+++ b/arch/mips/sgi-ip22/ip22-time.c
@@ -123,7 +123,7 @@ void __irq_entry indy_8254timer_irq(void)
         char c;
 
         irq_enter();
-        kstat_incr_irqs_this_cpu(irq, irq_to_desc(irq));
+        kstat_incr_irq_this_cpu(irq);
         printk(KERN_ALERT "Oops, got 8254 interrupt.\n");
         ArcRead(0, &c, 1, &cnt);
         ArcEnterInteractiveMode();
diff --git a/arch/mips/sibyte/bcm1480/irq.c b/arch/mips/sibyte/bcm1480/irq.c
index 09d6e16a70f1..59cfe2659771 100644
--- a/arch/mips/sibyte/bcm1480/irq.c
+++ b/arch/mips/sibyte/bcm1480/irq.c
@@ -95,7 +95,7 @@ static int bcm1480_set_affinity(struct irq_data *d, const struct cpumask *mask,
         u64 cur_ints;
         unsigned long flags;
 
-        i = cpumask_first(mask);
+        i = cpumask_first_and(mask, cpu_online_mask);
 
         /* Convert logical CPU to physical CPU */
         cpu = cpu_logical_map(i);
diff --git a/arch/mips/sibyte/bcm1480/smp.c b/arch/mips/sibyte/bcm1480/smp.c
index 54e2c4de15c1..70d9182b26f1 100644
--- a/arch/mips/sibyte/bcm1480/smp.c
+++ b/arch/mips/sibyte/bcm1480/smp.c
@@ -182,7 +182,7 @@ void bcm1480_mailbox_interrupt(void)
         int irq = K_BCM1480_INT_MBOX_0_0;
         unsigned int action;
 
-        kstat_incr_irqs_this_cpu(irq, irq_to_desc(irq));
+        kstat_incr_irq_this_cpu(irq);
         /* Load the mailbox register to figure out what we're supposed to do */
         action = (__raw_readq(mailbox_0_regs[cpu]) >> 48) & 0xffff;
 
diff --git a/arch/mips/sibyte/sb1250/irq.c b/arch/mips/sibyte/sb1250/irq.c
index fca0cdb99509..6d8dba5cf348 100644
--- a/arch/mips/sibyte/sb1250/irq.c
+++ b/arch/mips/sibyte/sb1250/irq.c
@@ -88,7 +88,7 @@ static int sb1250_set_affinity(struct irq_data *d, const struct cpumask *mask,
         u64 cur_ints;
         unsigned long flags;
 
-        i = cpumask_first(mask);
+        i = cpumask_first_and(mask, cpu_online_mask);
 
         /* Convert logical CPU to physical CPU */
         cpu = cpu_logical_map(i);
diff --git a/arch/mips/sibyte/sb1250/smp.c b/arch/mips/sibyte/sb1250/smp.c
index d7b942db0ea5..db976117dd4d 100644
--- a/arch/mips/sibyte/sb1250/smp.c
+++ b/arch/mips/sibyte/sb1250/smp.c
@@ -170,7 +170,7 @@ void sb1250_mailbox_interrupt(void)
         int irq = K_INT_MBOX_0;
         unsigned int action;
 
-        kstat_incr_irqs_this_cpu(irq, irq_to_desc(irq));
+        kstat_incr_irq_this_cpu(irq);
         /* Load the mailbox register to figure out what we're supposed to do */
         action = (____raw_readq(mailbox_regs[cpu]) >> 48) & 0xffff;
 
diff --git a/arch/mn10300/kernel/cevt-mn10300.c b/arch/mn10300/kernel/cevt-mn10300.c
index ccce35e3e179..60f64ca1752a 100644
--- a/arch/mn10300/kernel/cevt-mn10300.c
+++ b/arch/mn10300/kernel/cevt-mn10300.c
@@ -113,7 +113,7 @@ int __init init_clockevents(void)
         cd->set_next_event      = next_event;
 
         iact = &per_cpu(timer_irq, cpu);
-        iact->flags = IRQF_DISABLED | IRQF_SHARED | IRQF_TIMER;
+        iact->flags = IRQF_SHARED | IRQF_TIMER;
         iact->handler = timer_interrupt;
 
         clockevents_register_device(cd);
diff --git a/arch/mn10300/kernel/mn10300-serial.c b/arch/mn10300/kernel/mn10300-serial.c
index bf6e949a2f87..7ecf69879e2d 100644
--- a/arch/mn10300/kernel/mn10300-serial.c
+++ b/arch/mn10300/kernel/mn10300-serial.c
@@ -985,17 +985,17 @@ static int mn10300_serial_startup(struct uart_port *_port)
         irq_set_chip(port->tm_irq, &mn10300_serial_pic);
 
         if (request_irq(port->rx_irq, mn10300_serial_interrupt,
-                        IRQF_DISABLED | IRQF_NOBALANCING,
+                        IRQF_NOBALANCING,
                         port->rx_name, port) < 0)
                 goto error;
 
         if (request_irq(port->tx_irq, mn10300_serial_interrupt,
-                        IRQF_DISABLED | IRQF_NOBALANCING,
+                        IRQF_NOBALANCING,
                         port->tx_name, port) < 0)
                 goto error2;
 
         if (request_irq(port->tm_irq, mn10300_serial_interrupt,
-                        IRQF_DISABLED | IRQF_NOBALANCING,
+                        IRQF_NOBALANCING,
                         port->tm_name, port) < 0)
                 goto error3;
         mn10300_serial_mask_ack(port->tm_irq);
diff --git a/arch/mn10300/kernel/mn10300-watchdog.c b/arch/mn10300/kernel/mn10300-watchdog.c
index db64a7166c09..a2d8e6938d67 100644
--- a/arch/mn10300/kernel/mn10300-watchdog.c
+++ b/arch/mn10300/kernel/mn10300-watchdog.c
@@ -142,7 +142,7 @@ void watchdog_interrupt(struct pt_regs *regs, enum exception_code excep)
         NMICR = NMICR_WDIF;
 
         nmi_count(smp_processor_id())++;
-        kstat_incr_irqs_this_cpu(irq, irq_to_desc(irq));
+        kstat_incr_irq_this_cpu(irq);
 
         for_each_online_cpu(cpu) {
 
diff --git a/arch/mn10300/kernel/smp.c b/arch/mn10300/kernel/smp.c
index a17f9c9c14c9..f984193718b1 100644
--- a/arch/mn10300/kernel/smp.c
+++ b/arch/mn10300/kernel/smp.c
@@ -143,7 +143,7 @@ static struct irqaction call_function_ipi = {
 static irqreturn_t smp_ipi_timer_interrupt(int irq, void *dev_id);
 static struct irqaction local_timer_ipi = {
         .handler        = smp_ipi_timer_interrupt,
-        .flags          = IRQF_DISABLED | IRQF_NOBALANCING,
+        .flags          = IRQF_NOBALANCING,
         .name           = "smp local timer IPI"
 };
 #endif
diff --git a/arch/mn10300/unit-asb2364/irq-fpga.c b/arch/mn10300/unit-asb2364/irq-fpga.c
index e16c216f31dc..073e2ccc4a44 100644
--- a/arch/mn10300/unit-asb2364/irq-fpga.c
+++ b/arch/mn10300/unit-asb2364/irq-fpga.c
@@ -76,7 +76,7 @@ static irqreturn_t fpga_interrupt(int irq, void *_mask)
 static struct irqaction fpga_irq[]  = {
         [0] = {
                 .handler        = fpga_interrupt,
-                .flags          = IRQF_DISABLED | IRQF_SHARED,
+                .flags          = IRQF_SHARED,
                 .name           = "fpga",
         },
 };
diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c
index 8ceac4785609..cfe056fe7f5c 100644
--- a/arch/parisc/kernel/irq.c
+++ b/arch/parisc/kernel/irq.c
@@ -117,7 +117,7 @@ int cpu_check_affinity(struct irq_data *d, const struct cpumask *dest)
                 return -EINVAL;
 
         /* whatever mask they set, we just allow one CPU */
-        cpu_dest = first_cpu(*dest);
+        cpu_dest = cpumask_first_and(dest, cpu_online_mask);
 
         return cpu_dest;
 }
diff --git a/arch/powerpc/kernel/eeh_driver.c b/arch/powerpc/kernel/eeh_driver.c
index fdc679d309ec..bb61ca58ca6d 100644
--- a/arch/powerpc/kernel/eeh_driver.c
+++ b/arch/powerpc/kernel/eeh_driver.c
@@ -143,13 +143,30 @@ static void eeh_disable_irq(struct pci_dev *dev)
 static void eeh_enable_irq(struct pci_dev *dev)
 {
         struct eeh_dev *edev = pci_dev_to_eeh_dev(dev);
-        struct irq_desc *desc;
 
         if ((edev->mode) & EEH_DEV_IRQ_DISABLED) {
                 edev->mode &= ~EEH_DEV_IRQ_DISABLED;
-
-                desc = irq_to_desc(dev->irq);
-                if (desc && desc->depth > 0)
+                /*
+                 * FIXME !!!!!
+                 *
+                 * This is just ass backwards. This maze has
+                 * unbalanced irq_enable/disable calls. So instead of
+                 * finding the root cause it works around the warning
+                 * in the irq_enable code by conditionally calling
+                 * into it.
+                 *
+                 * That's just wrong.The warning in the core code is
+                 * there to tell people to fix their assymetries in
+                 * their own code, not by abusing the core information
+                 * to avoid it.
+                 *
+                 * I so wish that the assymetry would be the other way
+                 * round and a few more irq_disable calls render that
+                 * shit unusable forever.
+                 *
+                 *      tglx
+                 */
+                if (irqd_irq_disabled(irq_get_irq_data(dev->irq)))
                         enable_irq(dev->irq);
         }
 }
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 1d0848bba049..ca1cd7459c4a 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -465,7 +465,6 @@ static inline void check_stack_overflow(void)
 
 void __do_irq(struct pt_regs *regs)
 {
-        struct irq_desc *desc;
         unsigned int irq;
 
         irq_enter();
@@ -487,11 +486,8 @@ void __do_irq(struct pt_regs *regs)
         /* And finally process it */
         if (unlikely(irq == NO_IRQ))
                 __get_cpu_var(irq_stat).spurious_irqs++;
-        else {
-                desc = irq_to_desc(irq);
-                if (likely(desc))
-                        desc->handle_irq(irq, desc);
-        }
+        else
+                generic_handle_irq(irq);
 
         trace_irq_exit(regs);
 
diff --git a/arch/powerpc/sysdev/ehv_pic.c b/arch/powerpc/sysdev/ehv_pic.c
index b74085cea1af..2d20f10a4203 100644
--- a/arch/powerpc/sysdev/ehv_pic.c
+++ b/arch/powerpc/sysdev/ehv_pic.c
@@ -28,8 +28,6 @@
 #include <asm/ehv_pic.h>
 #include <asm/fsl_hcalls.h>
 
-#include "../../../kernel/irq/settings.h"
-
 static struct ehv_pic *global_ehv_pic;
 static DEFINE_SPINLOCK(ehv_pic_lock);
 
@@ -113,17 +111,13 @@ static unsigned int ehv_pic_type_to_vecpri(unsigned int type)
 int ehv_pic_set_irq_type(struct irq_data *d, unsigned int flow_type)
 {
         unsigned int src = virq_to_hw(d->irq);
-        struct irq_desc *desc = irq_to_desc(d->irq);
         unsigned int vecpri, vold, vnew, prio, cpu_dest;
         unsigned long flags;
 
         if (flow_type == IRQ_TYPE_NONE)
                 flow_type = IRQ_TYPE_LEVEL_LOW;
 
-        irq_settings_clr_level(desc);
-        irq_settings_set_trigger_mask(desc, flow_type);
-        if (flow_type & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW))
-                irq_settings_set_level(desc);
+        irqd_set_trigger_type(d, flow_type);
 
         vecpri = ehv_pic_type_to_vecpri(flow_type);
 
@@ -144,7 +138,7 @@ int ehv_pic_set_irq_type(struct irq_data *d, unsigned int flow_type)
         ev_int_set_config(src, vecpri, prio, cpu_dest);
 
         spin_unlock_irqrestore(&ehv_pic_lock, flags);
-        return 0;
+        return IRQ_SET_MASK_OK_NOCOPY;
 }
 
 static struct irq_chip ehv_pic_irq_chip = {
diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c
index bb27a262c44a..a770be97db4d 100644
--- a/arch/s390/kernel/irq.c
+++ b/arch/s390/kernel/irq.c
@@ -18,6 +18,7 @@
 #include <linux/errno.h>
 #include <linux/slab.h>
 #include <linux/cpu.h>
+#include <linux/irq.h>
 #include <asm/irq_regs.h>
 #include <asm/cputime.h>
 #include <asm/lowcore.h>
diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c
index 0833736afa32..65a1ecd77f96 100644
--- a/arch/sh/kernel/irq.c
+++ b/arch/sh/kernel/irq.c
@@ -217,19 +217,6 @@ void __init init_IRQ(void)
 }
 
 #ifdef CONFIG_HOTPLUG_CPU
-static void route_irq(struct irq_data *data, unsigned int irq, unsigned int cpu)
-{
-        struct irq_desc *desc = irq_to_desc(irq);
-        struct irq_chip *chip = irq_data_get_irq_chip(data);
-
-        printk(KERN_INFO "IRQ%u: moving from cpu%u to cpu%u\n",
-               irq, data->node, cpu);
-
-        raw_spin_lock_irq(&desc->lock);
-        chip->irq_set_affinity(data, cpumask_of(cpu), false);
-        raw_spin_unlock_irq(&desc->lock);
-}
-
 /*
  * The CPU has been marked offline.  Migrate IRQs off this CPU.  If
  * the affinity settings do not allow other CPUs, force them onto any
@@ -250,11 +237,8 @@ void migrate_irqs(void)
                                                     irq, cpu);
 
                                 cpumask_setall(data->affinity);
-                                newcpu = cpumask_any_and(data->affinity,
-                                                         cpu_online_mask);
                         }
-
-                        route_irq(data, irq, newcpu);
+                        irq_set_affinity(irq, data->affinity);
                 }
         }
 }
diff --git a/arch/sparc/kernel/time_64.c b/arch/sparc/kernel/time_64.c
index c3d82b5f54ca..24e8b8705e7f 100644
--- a/arch/sparc/kernel/time_64.c
+++ b/arch/sparc/kernel/time_64.c
@@ -733,7 +733,7 @@ void __irq_entry timer_interrupt(int irq, struct pt_regs *regs)
         irq_enter();
 
         local_cpu_data().irq0_irqs++;
-        kstat_incr_irqs_this_cpu(0, irq_to_desc(0));
+        kstat_incr_irq_this_cpu(0);
 
         if (unlikely(!evt->event_handler)) {
                 printk(KERN_WARNING
diff --git a/arch/x86/include/asm/floppy.h b/arch/x86/include/asm/floppy.h
index d3d74698dce9..1c7eefe32502 100644
--- a/arch/x86/include/asm/floppy.h
+++ b/arch/x86/include/asm/floppy.h
@@ -145,10 +145,10 @@ static int fd_request_irq(void)
 {
         if (can_use_virtual_dma)
                 return request_irq(FLOPPY_IRQ, floppy_hardint,
-                                   IRQF_DISABLED, "floppy", NULL);
+                                   0, "floppy", NULL);
         else
                 return request_irq(FLOPPY_IRQ, floppy_interrupt,
-                                   IRQF_DISABLED, "floppy", NULL);
+                                   0, "floppy", NULL);
 }
 
 static unsigned long dma_mem_alloc(unsigned long size)
diff --git a/arch/x86/include/asm/hardirq.h b/arch/x86/include/asm/hardirq.h
index ab0ae1aa6d0a..230853da4ec0 100644
--- a/arch/x86/include/asm/hardirq.h
+++ b/arch/x86/include/asm/hardirq.h
@@ -33,6 +33,9 @@ typedef struct {
 #ifdef CONFIG_X86_MCE_THRESHOLD
         unsigned int irq_threshold_count;
 #endif
+#if IS_ENABLED(CONFIG_HYPERV) || defined(CONFIG_XEN)
+        unsigned int irq_hv_callback_count;
+#endif
 } ____cacheline_aligned irq_cpustat_t;
 
 DECLARE_PER_CPU_SHARED_ALIGNED(irq_cpustat_t, irq_stat);
diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h
index cd9c41938b8a..c163215abb9a 100644
--- a/arch/x86/include/asm/mshyperv.h
+++ b/arch/x86/include/asm/mshyperv.h
@@ -2,6 +2,7 @@
 #define _ASM_X86_MSHYPER_H
 
 #include <linux/types.h>
+#include <linux/interrupt.h>
 #include <asm/hyperv.h>
 
 struct ms_hyperv_info {
@@ -16,6 +17,7 @@ void hyperv_callback_vector(void);
 #define trace_hyperv_callback_vector hyperv_callback_vector
 #endif
 void hyperv_vector_handler(struct pt_regs *regs);
-void hv_register_vmbus_handler(int irq, irq_handler_t handler);
+void hv_setup_vmbus_irq(void (*handler)(void));
+void hv_remove_vmbus_irq(void);
 
 #endif
diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
index 832d05a914ba..76f98fe5b35c 100644
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c
@@ -17,6 +17,7 @@
 #include <linux/hardirq.h>
 #include <linux/efi.h>
 #include <linux/interrupt.h>
+#include <linux/irq.h>
 #include <asm/processor.h>
 #include <asm/hypervisor.h>
 #include <asm/hyperv.h>
@@ -31,6 +32,45 @@
 struct ms_hyperv_info ms_hyperv;
 EXPORT_SYMBOL_GPL(ms_hyperv);
 
+#if IS_ENABLED(CONFIG_HYPERV)
+static void (*vmbus_handler)(void);
+
+void hyperv_vector_handler(struct pt_regs *regs)
+{
+        struct pt_regs *old_regs = set_irq_regs(regs);
+
+        irq_enter();
+        exit_idle();
+
+        inc_irq_stat(irq_hv_callback_count);
+        if (vmbus_handler)
+                vmbus_handler();
+
+        irq_exit();
+        set_irq_regs(old_regs);
+}
+
+void hv_setup_vmbus_irq(void (*handler)(void))
+{
+        vmbus_handler = handler;
+        /*
+         * Setup the IDT for hypervisor callback. Prevent reallocation
+         * at module reload.
+         */
+        if (!test_bit(HYPERVISOR_CALLBACK_VECTOR, used_vectors))
+                alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR,
+                                hyperv_callback_vector);
+}
+
+void hv_remove_vmbus_irq(void)
+{
+        /* We have no way to deallocate the interrupt gate */
+        vmbus_handler = NULL;
+}
+EXPORT_SYMBOL_GPL(hv_setup_vmbus_irq);
+EXPORT_SYMBOL_GPL(hv_remove_vmbus_irq);
+#endif
+
 static uint32_t  __init ms_hyperv_platform(void)
 {
         u32 eax;
@@ -119,41 +159,3 @@ const __refconst struct hypervisor_x86 x86_hyper_ms_hyperv = {
         .init_platform          = ms_hyperv_init_platform,
 };
 EXPORT_SYMBOL(x86_hyper_ms_hyperv);
-
-#if IS_ENABLED(CONFIG_HYPERV)
-static int vmbus_irq = -1;
-static irq_handler_t vmbus_isr;
-
-void hv_register_vmbus_handler(int irq, irq_handler_t handler)
-{
-        /*
-         * Setup the IDT for hypervisor callback.
-         */
-        alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, hyperv_callback_vector);
-
-        vmbus_irq = irq;
-        vmbus_isr = handler;
-}
-
-void hyperv_vector_handler(struct pt_regs *regs)
-{
-        struct pt_regs *old_regs = set_irq_regs(regs);
-        struct irq_desc *desc;
-
-        irq_enter();
-        exit_idle();
-
-        desc = irq_to_desc(vmbus_irq);
-
-        if (desc)
-                generic_handle_irq_desc(vmbus_irq, desc);
-
-        irq_exit();
-        set_irq_regs(old_regs);
-}
-#else
-void hv_register_vmbus_handler(int irq, irq_handler_t handler)
-{
-}
-#endif
-EXPORT_SYMBOL_GPL(hv_register_vmbus_handler);
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index b91abfdd4931..014618dbaa7b 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -521,7 +521,7 @@ static int hpet_setup_irq(struct hpet_dev *dev)
 {
 
         if (request_irq(dev->irq, hpet_interrupt_handler,
-                        IRQF_TIMER | IRQF_DISABLED | IRQF_NOBALANCING,
+                        IRQF_TIMER | IRQF_NOBALANCING,
                         dev->name, dev))
                 return -1;
 
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index d99f31d9a750..42805fac0092 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -125,6 +125,12 @@ int arch_show_interrupts(struct seq_file *p, int prec)
                 seq_printf(p, "%10u ", per_cpu(mce_poll_count, j));
         seq_printf(p, "  Machine check polls\n");
 #endif
+#if defined(CONFIG_HYPERV) || defined(CONFIG_XEN)
+        seq_printf(p, "%*s: ", prec, "THR");
+        for_each_online_cpu(j)
+                seq_printf(p, "%10u ", irq_stats(j)->irq_hv_callback_count);
+        seq_printf(p, "  Hypervisor callback interrupts\n");
+#endif
         seq_printf(p, "%*s: %10u\n", prec, "ERR", atomic_read(&irq_err_count));
 #if defined(CONFIG_X86_IO_APIC)
         seq_printf(p, "%*s: %10u\n", prec, "MIS", atomic_read(&irq_mis_count));
diff --git a/arch/x86/kernel/time.c b/arch/x86/kernel/time.c
index 6ec91c00d84d..bf7ef5ce29df 100644
--- a/arch/x86/kernel/time.c
+++ b/arch/x86/kernel/time.c
@@ -62,7 +62,7 @@ static irqreturn_t timer_interrupt(int irq, void *dev_id)
 
 static struct irqaction irq0  = {
         .handler = timer_interrupt,
-        .flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL | IRQF_TIMER,
+        .flags = IRQF_NOBALANCING | IRQF_IRQPOLL | IRQF_TIMER,
         .name = "timer"
 };
 
diff --git a/arch/x86/xen/spinlock.c b/arch/x86/xen/spinlock.c
index 581521c843a5..4d3acc34a998 100644
--- a/arch/x86/xen/spinlock.c
+++ b/arch/x86/xen/spinlock.c
@@ -183,7 +183,7 @@ __visible void xen_lock_spinning(struct arch_spinlock *lock, __ticket_t want)
 
         local_irq_save(flags);
 
-        kstat_incr_irqs_this_cpu(irq, irq_to_desc(irq));
+        kstat_incr_irq_this_cpu(irq);
 out:
         cpumask_clear_cpu(cpu, &waiting_cpus);
         w->lock = NULL;
diff --git a/arch/xtensa/kernel/irq.c b/arch/xtensa/kernel/irq.c
index 482868a2de6e..3eee94f621eb 100644
--- a/arch/xtensa/kernel/irq.c
+++ b/arch/xtensa/kernel/irq.c
@@ -155,18 +155,6 @@ void __init init_IRQ(void)
 }
 
 #ifdef CONFIG_HOTPLUG_CPU
-static void route_irq(struct irq_data *data, unsigned int irq, unsigned int cpu)
-{
-        struct irq_desc *desc = irq_to_desc(irq);
-        struct irq_chip *chip = irq_data_get_irq_chip(data);
-        unsigned long flags;
-
-        raw_spin_lock_irqsave(&desc->lock, flags);
-        if (chip->irq_set_affinity)
-                chip->irq_set_affinity(data, cpumask_of(cpu), false);
-        raw_spin_unlock_irqrestore(&desc->lock, flags);
-}
-
 /*
  * The CPU has been marked offline.  Migrate IRQs off this CPU.  If
  * the affinity settings do not allow other CPUs, force them onto any
@@ -175,10 +163,9 @@ static void route_irq(struct irq_data *data, unsigned int irq, unsigned int cpu)
 void migrate_irqs(void)
 {
         unsigned int i, cpu = smp_processor_id();
-        struct irq_desc *desc;
 
-        for_each_irq_desc(i, desc) {
-                struct irq_data *data = irq_desc_get_irq_data(desc);
+        for_each_active_irq(i) {
+                struct irq_data *data = irq_get_irq_data(i);
                 unsigned int newcpu;
 
                 if (irqd_is_per_cpu(data))
@@ -194,11 +181,8 @@ void migrate_irqs(void)
                                             i, cpu);
 
                         cpumask_setall(data->affinity);
-                        newcpu = cpumask_any_and(data->affinity,
-                                                 cpu_online_mask);
                 }
-
-                route_irq(data, i, newcpu);
+                irq_set_affinity(i, data->affinity);
         }
 }
 #endif /* CONFIG_HOTPLUG_CPU */
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 077bb1bdac34..3f0a95290e14 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -25,7 +25,6 @@
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/device.h>
-#include <linux/irq.h>
 #include <linux/interrupt.h>
 #include <linux/sysctl.h>
 #include <linux/slab.h>
@@ -558,9 +557,6 @@ static struct bus_type  hv_bus = {
         .dev_groups =           vmbus_groups,
 };
 
-static const char *driver_name = "hyperv";
-
-
 struct onmessage_work_context {
         struct work_struct work;
         struct hv_message msg;
@@ -619,7 +615,7 @@ static void vmbus_on_msg_dpc(unsigned long data)
         }
 }
 
-static irqreturn_t vmbus_isr(int irq, void *dev_id)
+static void vmbus_isr(void)
 {
         int cpu = smp_processor_id();
         void *page_addr;
@@ -629,7 +625,7 @@ static irqreturn_t vmbus_isr(int irq, void *dev_id)
 
         page_addr = hv_context.synic_event_page[cpu];
         if (page_addr == NULL)
-                return IRQ_NONE;
+                return;
 
         event = (union hv_synic_event_flags *)page_addr +
                                          VMBUS_MESSAGE_SINT;
@@ -665,28 +661,8 @@ static irqreturn_t vmbus_isr(int irq, void *dev_id)
         msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT;
 
         /* Check if there are actual msgs to be processed */
-        if (msg->header.message_type != HVMSG_NONE) {
-                handled = true;
+        if (msg->header.message_type != HVMSG_NONE)
                 tasklet_schedule(&msg_dpc);
-        }
-
-        if (handled)
-                return IRQ_HANDLED;
-        else
-                return IRQ_NONE;
-}
-
-/*
- * vmbus interrupt flow handler:
- * vmbus interrupts can concurrently occur on multiple CPUs and
- * can be handled concurrently.
- */
-
-static void vmbus_flow_handler(unsigned int irq, struct irq_desc *desc)
-{
-        kstat_incr_irqs_this_cpu(irq, desc);
-
-        desc->action->handler(irq, desc->action->dev_id);
 }
 
 /*
@@ -715,25 +691,7 @@ static int vmbus_bus_init(int irq)
         if (ret)
                 goto err_cleanup;
 
-        ret = request_irq(irq, vmbus_isr, 0, driver_name, hv_acpi_dev);
-
-        if (ret != 0) {
-                pr_err("Unable to request IRQ %d\n",
-                           irq);
-                goto err_unregister;
-        }
-
-        /*
-         * Vmbus interrupts can be handled concurrently on
-         * different CPUs. Establish an appropriate interrupt flow
-         * handler that can support this model.
-         */
-        irq_set_handler(irq, vmbus_flow_handler);
-
-        /*
-         * Register our interrupt handler.
-         */
-        hv_register_vmbus_handler(irq, vmbus_isr);
+        hv_setup_vmbus_irq(vmbus_isr);
 
         ret = hv_synic_alloc();
         if (ret)
@@ -753,9 +711,8 @@ static int vmbus_bus_init(int irq)
 
 err_alloc:
         hv_synic_free();
-        free_irq(irq, hv_acpi_dev);
+        hv_remove_vmbus_irq();
 
-err_unregister:
         bus_unregister(&hv_bus);
 
 err_cleanup:
@@ -947,7 +904,6 @@ static int __init hv_acpi_init(void)
         /*
          * Get irq resources first.
          */
-
         ret = acpi_bus_register_driver(&vmbus_acpi_driver);
 
         if (ret)
@@ -978,8 +934,7 @@ cleanup:
 
 static void __exit vmbus_exit(void)
 {
-
-        free_irq(irq, hv_acpi_dev);
+        hv_remove_vmbus_irq();
         vmbus_free_channels();
         bus_unregister(&hv_bus);
         hv_cleanup();
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index 5194afb39e78..1c0c151d108c 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_METAG_PERFCOUNTER_IRQS)	+= irq-metag.o
 obj-$(CONFIG_ARCH_MOXART)               += irq-moxart.o
 obj-$(CONFIG_ORION_IRQCHIP)             += irq-orion.o
 obj-$(CONFIG_ARCH_SUNXI)                += irq-sun4i.o
+obj-$(CONFIG_ARCH_SUNXI)                += irq-sunxi-nmi.o
 obj-$(CONFIG_ARCH_SPEAR3XX)             += spear-shirq.o
 obj-$(CONFIG_ARM_GIC)                   += irq-gic.o
 obj-$(CONFIG_ARM_NVIC)                  += irq-nvic.o
diff --git a/drivers/irqchip/irq-armada-370-xp.c b/drivers/irqchip/irq-armada-370-xp.c
index 540956465ed2..41be897df8d5 100644
--- a/drivers/irqchip/irq-armada-370-xp.c
+++ b/drivers/irqchip/irq-armada-370-xp.c
@@ -18,6 +18,7 @@
 #include <linux/init.h>
 #include <linux/irq.h>
 #include <linux/interrupt.h>
+#include <linux/irqchip/chained_irq.h>
 #include <linux/io.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
@@ -42,6 +43,7 @@
 #define ARMADA_370_XP_INT_SOURCE_CTL(irq)       (0x100 + irq*4)
 
 #define ARMADA_370_XP_CPU_INTACK_OFFS           (0x44)
+#define ARMADA_375_PPI_CAUSE                    (0x10)
 
 #define ARMADA_370_XP_SW_TRIG_INT_OFFS           (0x4)
 #define ARMADA_370_XP_IN_DRBEL_MSK_OFFS          (0xc)
@@ -352,7 +354,63 @@ static struct irq_domain_ops armada_370_xp_mpic_irq_ops = {
         .xlate = irq_domain_xlate_onecell,
 };
 
-static asmlinkage void __exception_irq_entry
+#ifdef CONFIG_PCI_MSI
+static void armada_370_xp_handle_msi_irq(struct pt_regs *regs, bool is_chained)
+{
+        u32 msimask, msinr;
+
+        msimask = readl_relaxed(per_cpu_int_base +
+                                ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS)
+                & PCI_MSI_DOORBELL_MASK;
+
+        writel(~msimask, per_cpu_int_base +
+               ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS);
+
+        for (msinr = PCI_MSI_DOORBELL_START;
+             msinr < PCI_MSI_DOORBELL_END; msinr++) {
+                int irq;
+
+                if (!(msimask & BIT(msinr)))
+                        continue;
+
+                irq = irq_find_mapping(armada_370_xp_msi_domain,
+                                       msinr - 16);
+
+                if (is_chained)
+                        generic_handle_irq(irq);
+                else
+                        handle_IRQ(irq, regs);
+        }
+}
+#else
+static void armada_370_xp_handle_msi_irq(struct pt_regs *r, bool b) {}
+#endif
+
+static void armada_370_xp_mpic_handle_cascade_irq(unsigned int irq,
+                                                  struct irq_desc *desc)
+{
+        struct irq_chip *chip = irq_get_chip(irq);
+        unsigned long irqmap, irqn;
+        unsigned int cascade_irq;
+
+        chained_irq_enter(chip, desc);
+
+        irqmap = readl_relaxed(per_cpu_int_base + ARMADA_375_PPI_CAUSE);
+
+        if (irqmap & BIT(0)) {
+                armada_370_xp_handle_msi_irq(NULL, true);
+                irqmap &= ~BIT(0);
+        }
+
+        for_each_set_bit(irqn, &irqmap, BITS_PER_LONG) {
+                cascade_irq = irq_find_mapping(armada_370_xp_mpic_domain, irqn);
+                generic_handle_irq(cascade_irq);
+        }
+
+        chained_irq_exit(chip, desc);
+}
+
+static void __exception_irq_entry
 armada_370_xp_handle_irq(struct pt_regs *regs)
 {
         u32 irqstat, irqnr;
@@ -372,31 +430,9 @@ armada_370_xp_handle_irq(struct pt_regs *regs)
                         continue;
                 }
 
-#ifdef CONFIG_PCI_MSI
                 /* MSI handling */
-                if (irqnr == 1) {
-                        u32 msimask, msinr;
-
-                        msimask = readl_relaxed(per_cpu_int_base +
-                                                ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS)
-                                & PCI_MSI_DOORBELL_MASK;
-
-                        writel(~msimask, per_cpu_int_base +
-                               ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS);
-
-                        for (msinr = PCI_MSI_DOORBELL_START;
-                             msinr < PCI_MSI_DOORBELL_END; msinr++) {
-                                int irq;
-
-                                if (!(msimask & BIT(msinr)))
-                                        continue;
-
-                                irq = irq_find_mapping(armada_370_xp_msi_domain,
-                                                       msinr - 16);
-                                handle_IRQ(irq, regs);
-                        }
-                }
-#endif
+                if (irqnr == 1)
+                        armada_370_xp_handle_msi_irq(regs, false);
 
 #ifdef CONFIG_SMP
                 /* IPI Handling */
@@ -427,6 +463,7 @@ static int __init armada_370_xp_mpic_of_init(struct device_node *node,
                                              struct device_node *parent)
 {
         struct resource main_int_res, per_cpu_int_res;
+        int parent_irq;
         u32 control;
 
         BUG_ON(of_address_to_resource(node, 0, &main_int_res));
@@ -455,8 +492,6 @@ static int __init armada_370_xp_mpic_of_init(struct device_node *node,
 
         BUG_ON(!armada_370_xp_mpic_domain);
 
-        irq_set_default_host(armada_370_xp_mpic_domain);
-
 #ifdef CONFIG_SMP
         armada_xp_mpic_smp_cpu_init();
 
@@ -472,7 +507,14 @@ static int __init armada_370_xp_mpic_of_init(struct device_node *node,
 
         armada_370_xp_msi_init(node, main_int_res.start);
 
-        set_handle_irq(armada_370_xp_handle_irq);
+        parent_irq = irq_of_parse_and_map(node, 0);
+        if (parent_irq <= 0) {
+                irq_set_default_host(armada_370_xp_mpic_domain);
+                set_handle_irq(armada_370_xp_handle_irq);
+        } else {
+                irq_set_chained_handler(parent_irq,
+                                        armada_370_xp_mpic_handle_cascade_irq);
+        }
 
         return 0;
 }
diff --git a/drivers/irqchip/irq-bcm2835.c b/drivers/irqchip/irq-bcm2835.c
index 1693b8e7f26a..5916d6cdafa1 100644
--- a/drivers/irqchip/irq-bcm2835.c
+++ b/drivers/irqchip/irq-bcm2835.c
@@ -95,7 +95,7 @@ struct armctrl_ic {
 };
 
 static struct armctrl_ic intc __read_mostly;
-static asmlinkage void __exception_irq_entry bcm2835_handle_irq(
+static void __exception_irq_entry bcm2835_handle_irq(
         struct pt_regs *regs);
 
 static void armctrl_mask_irq(struct irq_data *d)
@@ -196,7 +196,7 @@ static void armctrl_handle_shortcut(int bank, struct pt_regs *regs,
         handle_IRQ(irq_linear_revmap(intc.domain, irq), regs);
 }
 
-static asmlinkage void __exception_irq_entry bcm2835_handle_irq(
+static void __exception_irq_entry bcm2835_handle_irq(
         struct pt_regs *regs)
 {
         u32 stat, irq;
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index 341c6016812d..531769b2433a 100644
--- a/drivers/irqchip/irq-gic.c
+++ b/drivers/irqchip/irq-gic.c
@@ -50,7 +50,7 @@
 
 union gic_base {
         void __iomem *common_base;
-        void __percpu __iomem **percpu_base;
+        void __percpu * __iomem *percpu_base;
 };
 
 struct gic_chip_data {
@@ -279,7 +279,7 @@ static int gic_set_wake(struct irq_data *d, unsigned int on)
 #define gic_set_wake    NULL
 #endif
 
-static asmlinkage void __exception_irq_entry gic_handle_irq(struct pt_regs *regs)
+static void __exception_irq_entry gic_handle_irq(struct pt_regs *regs)
 {
         u32 irqstat, irqnr;
         struct gic_chip_data *gic = &gic_data[0];
@@ -648,7 +648,7 @@ static void __init gic_pm_init(struct gic_chip_data *gic)
 #endif
 
 #ifdef CONFIG_SMP
-void gic_raise_softirq(const struct cpumask *mask, unsigned int irq)
+static void gic_raise_softirq(const struct cpumask *mask, unsigned int irq)
 {
         int cpu;
         unsigned long flags, map = 0;
@@ -869,7 +869,7 @@ static struct notifier_block gic_cpu_notifier = {
 };
 #endif
 
-const struct irq_domain_ops gic_irq_domain_ops = {
+static const struct irq_domain_ops gic_irq_domain_ops = {
         .map = gic_irq_domain_map,
         .xlate = gic_irq_domain_xlate,
 };
@@ -974,7 +974,8 @@ void __init gic_init_bases(unsigned int gic_nr, int irq_start,
 #ifdef CONFIG_OF
 static int gic_cnt __initdata;
 
-int __init gic_of_init(struct device_node *node, struct device_node *parent)
+static int __init
+gic_of_init(struct device_node *node, struct device_node *parent)
 {
         void __iomem *cpu_base;
         void __iomem *dist_base;
diff --git a/drivers/irqchip/irq-mmp.c b/drivers/irqchip/irq-mmp.c
index 2cb7cd0bc2f5..3c8827fe83f3 100644
--- a/drivers/irqchip/irq-mmp.c
+++ b/drivers/irqchip/irq-mmp.c
@@ -194,8 +194,7 @@ static struct mmp_intc_conf mmp2_conf = {
         .conf_mask      = 0x7f,
 };
 
-static asmlinkage void __exception_irq_entry
-mmp_handle_irq(struct pt_regs *regs)
+static void __exception_irq_entry mmp_handle_irq(struct pt_regs *regs)
 {
         int irq, hwirq;
 
@@ -207,8 +206,7 @@ mmp_handle_irq(struct pt_regs *regs)
         handle_IRQ(irq, regs);
 }
 
-static asmlinkage void __exception_irq_entry
-mmp2_handle_irq(struct pt_regs *regs)
+static void __exception_irq_entry mmp2_handle_irq(struct pt_regs *regs)
 {
         int irq, hwirq;
 
diff --git a/drivers/irqchip/irq-moxart.c b/drivers/irqchip/irq-moxart.c
index 5552fc2bf28a..00b3cc908f76 100644
--- a/drivers/irqchip/irq-moxart.c
+++ b/drivers/irqchip/irq-moxart.c
@@ -44,7 +44,7 @@ struct moxart_irq_data {
 
 static struct moxart_irq_data intc;
 
-static asmlinkage void __exception_irq_entry handle_irq(struct pt_regs *regs)
+static void __exception_irq_entry handle_irq(struct pt_regs *regs)
 {
         u32 irqstat;
         int hwirq;
diff --git a/drivers/irqchip/irq-orion.c b/drivers/irqchip/irq-orion.c
index 8e41be62812e..e25f246cd2fb 100644
--- a/drivers/irqchip/irq-orion.c
+++ b/drivers/irqchip/irq-orion.c
@@ -30,7 +30,7 @@
 
 static struct irq_domain *orion_irq_domain;
 
-static asmlinkage void
+static void
 __exception_irq_entry orion_handle_irq(struct pt_regs *regs)
 {
         struct irq_domain_chip_generic *dgc = orion_irq_domain->gc;
diff --git a/drivers/irqchip/irq-sirfsoc.c b/drivers/irqchip/irq-sirfsoc.c
index 3a070c587ed9..581eefe331ae 100644
--- a/drivers/irqchip/irq-sirfsoc.c
+++ b/drivers/irqchip/irq-sirfsoc.c
@@ -47,7 +47,7 @@ sirfsoc_alloc_gc(void __iomem *base, unsigned int irq_start, unsigned int num)
         ct->regs.mask = SIRFSOC_INT_RISC_MASK0;
 }
 
-static asmlinkage void __exception_irq_entry sirfsoc_handle_irq(struct pt_regs *regs)
+static void __exception_irq_entry sirfsoc_handle_irq(struct pt_regs *regs)
 {
         void __iomem *base = sirfsoc_irqdomain->host_data;
         u32 irqstat, irqnr;
diff --git a/drivers/irqchip/irq-sun4i.c b/drivers/irqchip/irq-sun4i.c
index a5438d889245..6fcef4a95a18 100644
--- a/drivers/irqchip/irq-sun4i.c
+++ b/drivers/irqchip/irq-sun4i.c
@@ -36,18 +36,16 @@
 static void __iomem *sun4i_irq_base;
 static struct irq_domain *sun4i_irq_domain;
 
-static asmlinkage void __exception_irq_entry sun4i_handle_irq(struct pt_regs *regs);
+static void __exception_irq_entry sun4i_handle_irq(struct pt_regs *regs);
 
 static void sun4i_irq_ack(struct irq_data *irqd)
 {
         unsigned int irq = irqd_to_hwirq(irqd);
-        unsigned int irq_off = irq % 32;
-        int reg = irq / 32;
-        u32 val;
 
-        val = readl(sun4i_irq_base + SUN4I_IRQ_PENDING_REG(reg));
-        writel(val | (1 << irq_off),
-               sun4i_irq_base + SUN4I_IRQ_PENDING_REG(reg));
+        if (irq != 0)
+                return; /* Only IRQ 0 / the ENMI needs to be acked */
+
+        writel(BIT(0), sun4i_irq_base + SUN4I_IRQ_PENDING_REG(0));
 }
 
 static void sun4i_irq_mask(struct irq_data *irqd)
@@ -76,16 +74,16 @@ static void sun4i_irq_unmask(struct irq_data *irqd)
 
 static struct irq_chip sun4i_irq_chip = {
         .name           = "sun4i_irq",
-        .irq_ack        = sun4i_irq_ack,
+        .irq_eoi        = sun4i_irq_ack,
         .irq_mask       = sun4i_irq_mask,
         .irq_unmask     = sun4i_irq_unmask,
+        .flags          = IRQCHIP_EOI_THREADED | IRQCHIP_EOI_IF_HANDLED,
 };
 
 static int sun4i_irq_map(struct irq_domain *d, unsigned int virq,
                          irq_hw_number_t hw)
 {
-        irq_set_chip_and_handler(virq, &sun4i_irq_chip,
-                                 handle_level_irq);
+        irq_set_chip_and_handler(virq, &sun4i_irq_chip, handle_fasteoi_irq);
         set_irq_flags(virq, IRQF_VALID | IRQF_PROBE);
 
         return 0;
@@ -109,7 +107,7 @@ static int __init sun4i_of_init(struct device_node *node,
         writel(0, sun4i_irq_base + SUN4I_IRQ_ENABLE_REG(1));
         writel(0, sun4i_irq_base + SUN4I_IRQ_ENABLE_REG(2));
 
-        /* Mask all the interrupts */
+        /* Unmask all the interrupts, ENABLE_REG(x) is used for masking */
         writel(0, sun4i_irq_base + SUN4I_IRQ_MASK_REG(0));
         writel(0, sun4i_irq_base + SUN4I_IRQ_MASK_REG(1));
         writel(0, sun4i_irq_base + SUN4I_IRQ_MASK_REG(2));
@@ -134,16 +132,30 @@ static int __init sun4i_of_init(struct device_node *node,
 
         return 0;
 }
-IRQCHIP_DECLARE(allwinner_sun4i_ic, "allwinner,sun4i-ic", sun4i_of_init);
+IRQCHIP_DECLARE(allwinner_sun4i_ic, "allwinner,sun4i-a10-ic", sun4i_of_init);
 
-static asmlinkage void __exception_irq_entry sun4i_handle_irq(struct pt_regs *regs)
+static void __exception_irq_entry sun4i_handle_irq(struct pt_regs *regs)
 {
         u32 irq, hwirq;
 
+        /*
+         * hwirq == 0 can mean one of 3 things:
+         * 1) no more irqs pending
+         * 2) irq 0 pending
+         * 3) spurious irq
+         * So if we immediately get a reading of 0, check the irq-pending reg
+         * to differentiate between 2 and 3. We only do this once to avoid
+         * the extra check in the common case of 1 hapening after having
+         * read the vector-reg once.
+         */
         hwirq = readl(sun4i_irq_base + SUN4I_IRQ_VECTOR_REG) >> 2;
-        while (hwirq != 0) {
+        if (hwirq == 0 &&
+                  !(readl(sun4i_irq_base + SUN4I_IRQ_PENDING_REG(0)) & BIT(0)))
+                return;
+
+        do {
                 irq = irq_find_mapping(sun4i_irq_domain, hwirq);
                 handle_IRQ(irq, regs);
                 hwirq = readl(sun4i_irq_base + SUN4I_IRQ_VECTOR_REG) >> 2;
-        }
+        } while (hwirq != 0);
 }
diff --git a/drivers/irqchip/irq-sunxi-nmi.c b/drivers/irqchip/irq-sunxi-nmi.c
new file mode 100644
index 000000000000..12f547a44ae4
--- /dev/null
+++ b/drivers/irqchip/irq-sunxi-nmi.c
@@ -0,0 +1,208 @@
+/*
+ * Allwinner A20/A31 SoCs NMI IRQ chip driver.
+ *
+ * Carlo Caione <carlo.caione@gmail.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/bitops.h>
+#include <linux/device.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/irqchip/chained_irq.h>
+#include "irqchip.h"
+
+#define SUNXI_NMI_SRC_TYPE_MASK 0x00000003
+
+enum {
+        SUNXI_SRC_TYPE_LEVEL_LOW = 0,
+        SUNXI_SRC_TYPE_EDGE_FALLING,
+        SUNXI_SRC_TYPE_LEVEL_HIGH,
+        SUNXI_SRC_TYPE_EDGE_RISING,
+};
+
+struct sunxi_sc_nmi_reg_offs {
+        u32 ctrl;
+        u32 pend;
+        u32 enable;
+};
+
+static struct sunxi_sc_nmi_reg_offs sun7i_reg_offs = {
+        .ctrl   = 0x00,
+        .pend   = 0x04,
+        .enable = 0x08,
+};
+
+static struct sunxi_sc_nmi_reg_offs sun6i_reg_offs = {
+        .ctrl   = 0x00,
+        .pend   = 0x04,
+        .enable = 0x34,
+};
+
+static inline void sunxi_sc_nmi_write(struct irq_chip_generic *gc, u32 off,
+                                      u32 val)
+{
+        irq_reg_writel(val, gc->reg_base + off);
+}
+
+static inline u32 sunxi_sc_nmi_read(struct irq_chip_generic *gc, u32 off)
+{
+        return irq_reg_readl(gc->reg_base + off);
+}
+
+static void sunxi_sc_nmi_handle_irq(unsigned int irq, struct irq_desc *desc)
+{
+        struct irq_domain *domain = irq_desc_get_handler_data(desc);
+        struct irq_chip *chip = irq_get_chip(irq);
+        unsigned int virq = irq_find_mapping(domain, 0);
+
+        chained_irq_enter(chip, desc);
+        generic_handle_irq(virq);
+        chained_irq_exit(chip, desc);
+}
+
+static int sunxi_sc_nmi_set_type(struct irq_data *data, unsigned int flow_type)
+{
+        struct irq_chip_generic *gc = irq_data_get_irq_chip_data(data);
+        struct irq_chip_type *ct = gc->chip_types;
+        u32 src_type_reg;
+        u32 ctrl_off = ct->regs.type;
+        unsigned int src_type;
+        unsigned int i;
+
+        irq_gc_lock(gc);
+
+        switch (flow_type & IRQF_TRIGGER_MASK) {
+        case IRQ_TYPE_EDGE_FALLING:
+                src_type = SUNXI_SRC_TYPE_EDGE_FALLING;
+                break;
+        case IRQ_TYPE_EDGE_RISING:
+                src_type = SUNXI_SRC_TYPE_EDGE_RISING;
+                break;
+        case IRQ_TYPE_LEVEL_HIGH:
+                src_type = SUNXI_SRC_TYPE_LEVEL_HIGH;
+                break;
+        case IRQ_TYPE_NONE:
+        case IRQ_TYPE_LEVEL_LOW:
+                src_type = SUNXI_SRC_TYPE_LEVEL_LOW;
+                break;
+        default:
+                irq_gc_unlock(gc);
+                pr_err("%s: Cannot assign multiple trigger modes to IRQ %d.\n",
+                        __func__, data->irq);
+                return -EBADR;
+        }
+
+        irqd_set_trigger_type(data, flow_type);
+        irq_setup_alt_chip(data, flow_type);
+
+        for (i = 0; i <= gc->num_ct; i++, ct++)
+                if (ct->type & flow_type)
+                        ctrl_off = ct->regs.type;
+
+        src_type_reg = sunxi_sc_nmi_read(gc, ctrl_off);
+        src_type_reg &= ~SUNXI_NMI_SRC_TYPE_MASK;
+        src_type_reg |= src_type;
+        sunxi_sc_nmi_write(gc, ctrl_off, src_type_reg);
+
+        irq_gc_unlock(gc);
+
+        return IRQ_SET_MASK_OK;
+}
+
+static int __init sunxi_sc_nmi_irq_init(struct device_node *node,
+                                        struct sunxi_sc_nmi_reg_offs *reg_offs)
+{
+        struct irq_domain *domain;
+        struct irq_chip_generic *gc;
+        unsigned int irq;
+        unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN;
+        int ret;
+
+
+        domain = irq_domain_add_linear(node, 1, &irq_generic_chip_ops, NULL);
+        if (!domain) {
+                pr_err("%s: Could not register interrupt domain.\n", node->name);
+                return -ENOMEM;
+        }
+
+        ret = irq_alloc_domain_generic_chips(domain, 1, 2, node->name,
+                                             handle_fasteoi_irq, clr, 0,
+                                             IRQ_GC_INIT_MASK_CACHE);
+        if (ret) {
+                 pr_err("%s: Could not allocate generic interrupt chip.\n",
+                         node->name);
+                 goto fail_irqd_remove;
+        }
+
+        irq = irq_of_parse_and_map(node, 0);
+        if (irq <= 0) {
+                pr_err("%s: unable to parse irq\n", node->name);
+                ret = -EINVAL;
+                goto fail_irqd_remove;
+        }
+
+        gc = irq_get_domain_generic_chip(domain, 0);
+        gc->reg_base = of_iomap(node, 0);
+        if (!gc->reg_base) {
+                pr_err("%s: unable to map resource\n", node->name);
+                ret = -ENOMEM;
+                goto fail_irqd_remove;
+        }
+
+        gc->chip_types[0].type                  = IRQ_TYPE_LEVEL_MASK;
+        gc->chip_types[0].chip.irq_mask         = irq_gc_mask_clr_bit;
+        gc->chip_types[0].chip.irq_unmask       = irq_gc_mask_set_bit;
+        gc->chip_types[0].chip.irq_eoi          = irq_gc_ack_set_bit;
+        gc->chip_types[0].chip.irq_set_type     = sunxi_sc_nmi_set_type;
+        gc->chip_types[0].chip.flags            = IRQCHIP_EOI_THREADED | IRQCHIP_EOI_IF_HANDLED;
+        gc->chip_types[0].regs.ack              = reg_offs->pend;
+        gc->chip_types[0].regs.mask             = reg_offs->enable;
+        gc->chip_types[0].regs.type             = reg_offs->ctrl;
+
+        gc->chip_types[1].type                  = IRQ_TYPE_EDGE_BOTH;
+        gc->chip_types[1].chip.name             = gc->chip_types[0].chip.name;
+        gc->chip_types[1].chip.irq_ack          = irq_gc_ack_set_bit;
+        gc->chip_types[1].chip.irq_mask         = irq_gc_mask_clr_bit;
+        gc->chip_types[1].chip.irq_unmask       = irq_gc_mask_set_bit;
+        gc->chip_types[1].chip.irq_set_type     = sunxi_sc_nmi_set_type;
+        gc->chip_types[1].regs.ack              = reg_offs->pend;
+        gc->chip_types[1].regs.mask             = reg_offs->enable;
+        gc->chip_types[1].regs.type             = reg_offs->ctrl;
+        gc->chip_types[1].handler               = handle_edge_irq;
+
+        sunxi_sc_nmi_write(gc, reg_offs->enable, 0);
+        sunxi_sc_nmi_write(gc, reg_offs->pend, 0x1);
+
+        irq_set_handler_data(irq, domain);
+        irq_set_chained_handler(irq, sunxi_sc_nmi_handle_irq);
+
+        return 0;
+
+fail_irqd_remove:
+        irq_domain_remove(domain);
+
+        return ret;
+}
+
+static int __init sun6i_sc_nmi_irq_init(struct device_node *node,
+                                        struct device_node *parent)
+{
+        return sunxi_sc_nmi_irq_init(node, &sun6i_reg_offs);
+}
+IRQCHIP_DECLARE(sun6i_sc_nmi, "allwinner,sun6i-a31-sc-nmi", sun6i_sc_nmi_irq_init);
+
+static int __init sun7i_sc_nmi_irq_init(struct device_node *node,
+                                        struct device_node *parent)
+{
+        return sunxi_sc_nmi_irq_init(node, &sun7i_reg_offs);
+}
+IRQCHIP_DECLARE(sun7i_sc_nmi, "allwinner,sun7i-a20-sc-nmi", sun7i_sc_nmi_irq_init);
diff --git a/drivers/irqchip/irq-vic.c b/drivers/irqchip/irq-vic.c
index 8e21ae0bab46..473f09a74d4d 100644
--- a/drivers/irqchip/irq-vic.c
+++ b/drivers/irqchip/irq-vic.c
@@ -228,7 +228,7 @@ static int handle_one_vic(struct vic_device *vic, struct pt_regs *regs)
  * Keep iterating over all registered VIC's until there are no pending
  * interrupts.
  */
-static asmlinkage void __exception_irq_entry vic_handle_irq(struct pt_regs *regs)
+static void __exception_irq_entry vic_handle_irq(struct pt_regs *regs)
 {
         int i, handled;
 
diff --git a/drivers/irqchip/irq-vt8500.c b/drivers/irqchip/irq-vt8500.c
index 1846e7d66681..eb6e91efdec8 100644
--- a/drivers/irqchip/irq-vt8500.c
+++ b/drivers/irqchip/irq-vt8500.c
@@ -178,8 +178,7 @@ static struct irq_domain_ops vt8500_irq_domain_ops = {
         .xlate = irq_domain_xlate_onecell,
 };
 
-static asmlinkage
-void __exception_irq_entry vt8500_handle_irq(struct pt_regs *regs)
+static void __exception_irq_entry vt8500_handle_irq(struct pt_regs *regs)
 {
         u32 stat, i;
         int irqnr, virq;
diff --git a/drivers/irqchip/irq-xtensa-mx.c b/drivers/irqchip/irq-xtensa-mx.c
index f693f1bc1348..e1c2f9632893 100644
--- a/drivers/irqchip/irq-xtensa-mx.c
+++ b/drivers/irqchip/irq-xtensa-mx.c
@@ -122,7 +122,7 @@ static int xtensa_mx_irq_retrigger(struct irq_data *d)
 static int xtensa_mx_irq_set_affinity(struct irq_data *d,
                 const struct cpumask *dest, bool force)
 {
-        unsigned mask = 1u << cpumask_any(dest);
+        unsigned mask = 1u << cpumask_any_and(dest, cpu_online_mask);
 
         set_er(mask, MIROUT(d->hwirq - HW_IRQ_MX_BASE));
         return 0;
diff --git a/drivers/irqchip/irq-zevio.c b/drivers/irqchip/irq-zevio.c
index 8ed04c4a43ee..ceb3a4318f73 100644
--- a/drivers/irqchip/irq-zevio.c
+++ b/drivers/irqchip/irq-zevio.c
@@ -50,7 +50,7 @@ static void zevio_irq_ack(struct irq_data *irqd)
         readl(gc->reg_base + regs->ack);
 }
 
-static asmlinkage void __exception_irq_entry zevio_handle_irq(struct pt_regs *regs)
+static void __exception_irq_entry zevio_handle_irq(struct pt_regs *regs)
 {
         int irqnr;
 
diff --git a/drivers/irqchip/irqchip.c b/drivers/irqchip/irqchip.c
index f496afce29de..cad3e2495552 100644
--- a/drivers/irqchip/irqchip.c
+++ b/drivers/irqchip/irqchip.c
@@ -10,8 +10,7 @@
 
 #include <linux/init.h>
 #include <linux/of_irq.h>
-
-#include "irqchip.h"
+#include <linux/irqchip.h>
 
 /*
  * This special of_device_id is the sentinel at the end of the
diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index 17ce88f79d2b..2e48ecf09e2c 100644
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -294,14 +294,12 @@ no_valid_irq:
 static void clear_irq(unsigned int irq)
 {
         unsigned int pos, nvec;
-        struct irq_desc *desc;
         struct msi_desc *msi;
         struct pcie_port *pp;
         struct irq_data *data = irq_get_irq_data(irq);
 
         /* get the port structure */
-        desc = irq_to_desc(irq);
-        msi = irq_desc_get_msi_desc(desc);
+        msi = irq_data_get_msi(data);
         pp = sys_to_pcie(msi->dev->bus->sysdata);
         if (!pp) {
                 BUG();
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index d691e6a13aae..9e058c4657a3 100644
--- a/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@ -18,6 +18,7 @@
 #include <linux/device.h>
 #include <linux/kernel_stat.h>
 #include <linux/interrupt.h>
+#include <linux/irq.h>
 #include <asm/cio.h>
 #include <asm/delay.h>
 #include <asm/irq.h>
@@ -584,8 +585,6 @@ static irqreturn_t do_cio_interrupt(int irq, void *dummy)
         return IRQ_HANDLED;
 }
 
-static struct irq_desc *irq_desc_io;
-
 static struct irqaction io_interrupt = {
         .name    = "IO",
         .handler = do_cio_interrupt,
@@ -596,7 +595,6 @@ void __init init_cio_interrupts(void)
         irq_set_chip_and_handler(IO_INTERRUPT,
                                  &dummy_irq_chip, handle_percpu_irq);
         setup_irq(IO_INTERRUPT, &io_interrupt);
-        irq_desc_io = irq_to_desc(IO_INTERRUPT);
 }
 
 #ifdef CONFIG_CCW_CONSOLE
@@ -623,7 +621,7 @@ void cio_tsch(struct subchannel *sch)
                 local_bh_disable();
                 irq_enter();
         }
-        kstat_incr_irqs_this_cpu(IO_INTERRUPT, irq_desc_io);
+        kstat_incr_irq_this_cpu(IO_INTERRUPT);
         if (sch->driver && sch->driver->irq)
                 sch->driver->irq(sch);
         else
diff --git a/drivers/xen/events/events_2l.c b/drivers/xen/events/events_2l.c
index d7ff91757307..5db43fc100a4 100644
--- a/drivers/xen/events/events_2l.c
+++ b/drivers/xen/events/events_2l.c
@@ -166,7 +166,6 @@ static void evtchn_2l_handle_events(unsigned cpu)
         int start_word_idx, start_bit_idx;
         int word_idx, bit_idx;
         int i;
-        struct irq_desc *desc;
         struct shared_info *s = HYPERVISOR_shared_info;
         struct vcpu_info *vcpu_info = __this_cpu_read(xen_vcpu);
 
@@ -176,11 +175,8 @@ static void evtchn_2l_handle_events(unsigned cpu)
                 unsigned int evtchn = evtchn_from_irq(irq);
                 word_idx = evtchn / BITS_PER_LONG;
                 bit_idx = evtchn % BITS_PER_LONG;
-                if (active_evtchns(cpu, s, word_idx) & (1ULL << bit_idx)) {
-                        desc = irq_to_desc(irq);
-                        if (desc)
-                                generic_handle_irq_desc(irq, desc);
-                }
+                if (active_evtchns(cpu, s, word_idx) & (1ULL << bit_idx))
+                        generic_handle_irq(irq);
         }
 
         /*
@@ -245,11 +241,8 @@ static void evtchn_2l_handle_events(unsigned cpu)
                         port = (word_idx * BITS_PER_EVTCHN_WORD) + bit_idx;
                         irq = get_evtchn_to_irq(port);
 
-                        if (irq != -1) {
-                                desc = irq_to_desc(irq);
-                                if (desc)
-                                        generic_handle_irq_desc(irq, desc);
-                        }
+                        if (irq != -1)
+                                generic_handle_irq(irq);
 
                         bit_idx = (bit_idx + 1) % BITS_PER_EVTCHN_WORD;
 
diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c
index f4a9e3311297..c3458f58de90 100644
--- a/drivers/xen/events/events_base.c
+++ b/drivers/xen/events/events_base.c
@@ -336,9 +336,8 @@ static void bind_evtchn_to_cpu(unsigned int chn, unsigned int cpu)
 
         BUG_ON(irq == -1);
 #ifdef CONFIG_SMP
-        cpumask_copy(irq_to_desc(irq)->irq_data.affinity, cpumask_of(cpu));
+        cpumask_copy(irq_get_irq_data(irq)->affinity, cpumask_of(cpu));
 #endif
-
         xen_evtchn_port_bind_to_cpu(info, cpu);
 
         info->cpu = cpu;
@@ -373,10 +372,8 @@ static void xen_irq_init(unsigned irq)
 {
         struct irq_info *info;
 #ifdef CONFIG_SMP
-        struct irq_desc *desc = irq_to_desc(irq);
-
         /* By default all event channels notify CPU#0. */
-        cpumask_copy(desc->irq_data.affinity, cpumask_of(0));
+        cpumask_copy(irq_get_irq_data(irq)->affinity, cpumask_of(0));
 #endif
 
         info = kzalloc(sizeof(*info), GFP_KERNEL);
@@ -490,13 +487,6 @@ static void pirq_query_unmask(int irq)
                 info->u.pirq.flags |= PIRQ_NEEDS_EOI;
 }
 
-static bool probing_irq(int irq)
-{
-        struct irq_desc *desc = irq_to_desc(irq);
-
-        return desc && desc->action == NULL;
-}
-
 static void eoi_pirq(struct irq_data *data)
 {
         int evtchn = evtchn_from_irq(data->irq);
@@ -538,8 +528,7 @@ static unsigned int __startup_pirq(unsigned int irq)
                                         BIND_PIRQ__WILL_SHARE : 0;
         rc = HYPERVISOR_event_channel_op(EVTCHNOP_bind_pirq, &bind_pirq);
         if (rc != 0) {
-                if (!probing_irq(irq))
-                        pr_info("Failed to obtain physical IRQ %d\n", irq);
+                pr_warn("Failed to obtain physical IRQ %d\n", irq);
                 return 0;
         }
         evtchn = bind_pirq.port;
@@ -772,17 +761,12 @@ error_irq:
 
 int xen_destroy_irq(int irq)
 {
-        struct irq_desc *desc;
         struct physdev_unmap_pirq unmap_irq;
         struct irq_info *info = info_for_irq(irq);
         int rc = -ENOENT;
 
         mutex_lock(&irq_mapping_update_lock);
 
-        desc = irq_to_desc(irq);
-        if (!desc)
-                goto out;
-
         if (xen_initial_domain()) {
                 unmap_irq.pirq = info->u.pirq.pirq;
                 unmap_irq.domid = info->u.pirq.domid;
@@ -1251,6 +1235,7 @@ void xen_evtchn_do_upcall(struct pt_regs *regs)
 #ifdef CONFIG_X86
         exit_idle();
 #endif
+        inc_irq_stat(irq_hv_callback_count);
 
         __xen_evtchn_do_upcall();
 
@@ -1339,7 +1324,7 @@ static int rebind_irq_to_cpu(unsigned irq, unsigned tcpu)
 static int set_affinity_irq(struct irq_data *data, const struct cpumask *dest,
                             bool force)
 {
-        unsigned tcpu = cpumask_first(dest);
+        unsigned tcpu = cpumask_first_and(dest, cpu_online_mask);
 
         return rebind_irq_to_cpu(data->irq, tcpu);
 }
diff --git a/drivers/xen/events/events_fifo.c b/drivers/xen/events/events_fifo.c
index 1de2a191b395..96109a9972b6 100644
--- a/drivers/xen/events/events_fifo.c
+++ b/drivers/xen/events/events_fifo.c
@@ -235,14 +235,10 @@ static uint32_t clear_linked(volatile event_word_t *word)
 static void handle_irq_for_port(unsigned port)
 {
         int irq;
-        struct irq_desc *desc;
 
         irq = get_evtchn_to_irq(port);
-        if (irq != -1) {
-                desc = irq_to_desc(irq);
-                if (desc)
-                        generic_handle_irq_desc(irq, desc);
-        }
+        if (irq != -1)
+                generic_handle_irq(irq);
 }
 
 static void consume_one_event(unsigned cpu,
diff --git a/include/linux/hardirq.h b/include/linux/hardirq.h
index 12d5f972f23f..cba442ec3c66 100644
--- a/include/linux/hardirq.h
+++ b/include/linux/hardirq.h
@@ -9,6 +9,7 @@
 
 
 extern void synchronize_irq(unsigned int irq);
+extern void synchronize_hardirq(unsigned int irq);
 
 #if defined(CONFIG_TINY_RCU)
 
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index a2678d35b5a2..c7bfac1c4a7b 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -188,6 +188,7 @@ extern void disable_irq(unsigned int irq);
 extern void disable_percpu_irq(unsigned int irq);
 extern void enable_irq(unsigned int irq);
 extern void enable_percpu_irq(unsigned int irq, unsigned int type);
+extern void irq_wake_thread(unsigned int irq, void *dev_id);
 
 /* The following three functions are for the core kernel use only. */
 extern void suspend_device_irqs(void);
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 7dc10036eff5..d278838908cb 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -303,6 +303,10 @@ static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d)
  * @irq_pm_shutdown:    function called from core code on shutdown once per chip
  * @irq_calc_mask:      Optional function to set irq_data.mask for special cases
  * @irq_print_chip:     optional to print special chip info in show_interrupts
+ * @irq_request_resources:      optional to request resources before calling
+ *                              any other callback related to this irq
+ * @irq_release_resources:      optional to release resources acquired with
+ *                              irq_request_resources
  * @flags:              chip specific flags
  */
 struct irq_chip {
@@ -336,6 +340,8 @@ struct irq_chip {
         void            (*irq_calc_mask)(struct irq_data *data);
 
         void            (*irq_print_chip)(struct irq_data *data, struct seq_file *p);
+        int             (*irq_request_resources)(struct irq_data *data);
+        void            (*irq_release_resources)(struct irq_data *data);
 
         unsigned long   flags;
 };
@@ -349,6 +355,8 @@ struct irq_chip {
  * IRQCHIP_ONOFFLINE_ENABLED:   Only call irq_on/off_line callbacks
  *                              when irq enabled
  * IRQCHIP_SKIP_SET_WAKE:       Skip chip.irq_set_wake(), for this irq chip
+ * IRQCHIP_ONESHOT_SAFE:        One shot does not require mask/unmask
+ * IRQCHIP_EOI_THREADED:        Chip requires eoi() on unmask in threaded mode
  */
 enum {
         IRQCHIP_SET_TYPE_MASKED         = (1 <<  0),
@@ -357,6 +365,7 @@ enum {
         IRQCHIP_ONOFFLINE_ENABLED       = (1 <<  3),
         IRQCHIP_SKIP_SET_WAKE           = (1 <<  4),
         IRQCHIP_ONESHOT_SAFE            = (1 <<  5),
+        IRQCHIP_EOI_THREADED            = (1 <<  6),
 };
 
 /* This include will go away once we isolated irq_desc usage to core code */
diff --git a/include/linux/kernel_stat.h b/include/linux/kernel_stat.h
index d7c61317db86..ecbc52f9ff77 100644
--- a/include/linux/kernel_stat.h
+++ b/include/linux/kernel_stat.h
@@ -51,14 +51,8 @@ DECLARE_PER_CPU(struct kernel_cpustat, kernel_cpustat);
 
 extern unsigned long long nr_context_switches(void);
 
-#include <linux/irq.h>
 extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
-
-#define kstat_incr_irqs_this_cpu(irqno, DESC)           \
-do {                                                    \
-        __this_cpu_inc(*(DESC)->kstat_irqs);            \
-        __this_cpu_inc(kstat.irqs_sum);                 \
-} while (0)
+extern void kstat_incr_irq_this_cpu(unsigned int irq);
 
 static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
 {
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index dc04c166c54d..6397df2d6945 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -281,6 +281,19 @@ void unmask_irq(struct irq_desc *desc)
         }
 }
 
+void unmask_threaded_irq(struct irq_desc *desc)
+{
+        struct irq_chip *chip = desc->irq_data.chip;
+
+        if (chip->flags & IRQCHIP_EOI_THREADED)
+                chip->irq_eoi(&desc->irq_data);
+
+        if (chip->irq_unmask) {
+                chip->irq_unmask(&desc->irq_data);
+                irq_state_clr_masked(desc);
+        }
+}
+
 /*
  *      handle_nested_irq - Handle a nested irq from a irq thread
  *      @irq:   the interrupt number
@@ -435,6 +448,27 @@ static inline void preflow_handler(struct irq_desc *desc)
 static inline void preflow_handler(struct irq_desc *desc) { }
 #endif
 
+static void cond_unmask_eoi_irq(struct irq_desc *desc, struct irq_chip *chip)
+{
+        if (!(desc->istate & IRQS_ONESHOT)) {
+                chip->irq_eoi(&desc->irq_data);
+                return;
+        }
+        /*
+         * We need to unmask in the following cases:
+         * - Oneshot irq which did not wake the thread (caused by a
+         *   spurious interrupt or a primary handler handling it
+         *   completely).
+         */
+        if (!irqd_irq_disabled(&desc->irq_data) &&
+            irqd_irq_masked(&desc->irq_data) && !desc->threads_oneshot) {
+                chip->irq_eoi(&desc->irq_data);
+                unmask_irq(desc);
+        } else if (!(chip->flags & IRQCHIP_EOI_THREADED)) {
+                chip->irq_eoi(&desc->irq_data);
+        }
+}
+
 /**
  *      handle_fasteoi_irq - irq handler for transparent controllers
  *      @irq:   the interrupt number
@@ -448,6 +482,8 @@ static inline void preflow_handler(struct irq_desc *desc) { }
 void
 handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc)
 {
+        struct irq_chip *chip = desc->irq_data.chip;
+
         raw_spin_lock(&desc->lock);
 
         if (unlikely(irqd_irq_inprogress(&desc->irq_data)))
@@ -473,18 +509,14 @@ handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc)
         preflow_handler(desc);
         handle_irq_event(desc);
 
-        if (desc->istate & IRQS_ONESHOT)
-                cond_unmask_irq(desc);
+        cond_unmask_eoi_irq(desc, chip);
 
-out_eoi:
-        desc->irq_data.chip->irq_eoi(&desc->irq_data);
-out_unlock:
         raw_spin_unlock(&desc->lock);
         return;
 out:
-        if (!(desc->irq_data.chip->flags & IRQCHIP_EOI_IF_HANDLED))
-                goto out_eoi;
-        goto out_unlock;
+        if (!(chip->flags & IRQCHIP_EOI_IF_HANDLED))
+                chip->irq_eoi(&desc->irq_data);
+        raw_spin_unlock(&desc->lock);
 }
 
 /**
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 131ca176b497..635480270858 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -41,6 +41,7 @@ irqreturn_t no_action(int cpl, void *dev_id)
 {
         return IRQ_NONE;
 }
+EXPORT_SYMBOL_GPL(no_action);
 
 static void warn_no_thread(unsigned int irq, struct irqaction *action)
 {
@@ -51,7 +52,7 @@ static void warn_no_thread(unsigned int irq, struct irqaction *action)
                "but no thread function available.", irq, action->name);
 }
 
-static void irq_wake_thread(struct irq_desc *desc, struct irqaction *action)
+void __irq_wake_thread(struct irq_desc *desc, struct irqaction *action)
 {
         /*
          * In case the thread crashed and was killed we just pretend that
@@ -157,7 +158,7 @@ handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action)
                                 break;
                         }
 
-                        irq_wake_thread(desc, action);
+                        __irq_wake_thread(desc, action);
 
                         /* Fall through to add to randomness */
                 case IRQ_HANDLED:
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
index 001fa5bab490..ddf1ffeb79f1 100644
--- a/kernel/irq/internals.h
+++ b/kernel/irq/internals.h
@@ -6,6 +6,7 @@
  * of this file for your non core code.
  */
 #include <linux/irqdesc.h>
+#include <linux/kernel_stat.h>
 
 #ifdef CONFIG_SPARSE_IRQ
 # define IRQ_BITMAP_BITS        (NR_IRQS + 8196)
@@ -73,6 +74,7 @@ extern void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu);
 extern void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu);
 extern void mask_irq(struct irq_desc *desc);
 extern void unmask_irq(struct irq_desc *desc);
+extern void unmask_threaded_irq(struct irq_desc *desc);
 
 extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
 
@@ -82,6 +84,7 @@ irqreturn_t handle_irq_event(struct irq_desc *desc);
 /* Resending of interrupts :*/
 void check_irq_resend(struct irq_desc *desc, unsigned int irq);
 bool irq_wait_for_poll(struct irq_desc *desc);
+void __irq_wake_thread(struct irq_desc *desc, struct irqaction *action);
 
 #ifdef CONFIG_PROC_FS
 extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);
@@ -179,3 +182,9 @@ static inline bool irqd_has_set(struct irq_data *d, unsigned int mask)
 {
         return d->state_use_accessors & mask;
 }
+
+static inline void kstat_incr_irqs_this_cpu(unsigned int irq, struct irq_desc *desc)
+{
+        __this_cpu_inc(*desc->kstat_irqs);
+        __this_cpu_inc(kstat.irqs_sum);
+}
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 8ab8e9390297..a7174617616b 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -489,6 +489,11 @@ void dynamic_irq_cleanup(unsigned int irq)
         raw_spin_unlock_irqrestore(&desc->lock, flags);
 }
 
+void kstat_incr_irq_this_cpu(unsigned int irq)
+{
+        kstat_incr_irqs_this_cpu(irq, irq_to_desc(irq));
+}
+
 unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
 {
         struct irq_desc *desc = irq_to_desc(irq);
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index d3bf660cb57f..2486a4c1a710 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -32,24 +32,10 @@ static int __init setup_forced_irqthreads(char *arg)
 early_param("threadirqs", setup_forced_irqthreads);
 #endif
 
-/**
- *      synchronize_irq - wait for pending IRQ handlers (on other CPUs)
- *      @irq: interrupt number to wait for
- *
- *      This function waits for any pending IRQ handlers for this interrupt
- *      to complete before returning. If you use this function while
- *      holding a resource the IRQ handler may need you will deadlock.
- *
- *      This function may be called - with care - from IRQ context.
- */
-void synchronize_irq(unsigned int irq)
+static void __synchronize_hardirq(struct irq_desc *desc)
 {
-        struct irq_desc *desc = irq_to_desc(irq);
         bool inprogress;
 
-        if (!desc)
-                return;
-
         do {
                 unsigned long flags;
 
@@ -67,12 +53,56 @@ void synchronize_irq(unsigned int irq)
 
                 /* Oops, that failed? */
         } while (inprogress);
+}
 
-        /*
-         * We made sure that no hardirq handler is running. Now verify
-         * that no threaded handlers are active.
-         */
-        wait_event(desc->wait_for_threads, !atomic_read(&desc->threads_active));
+/**
+ *      synchronize_hardirq - wait for pending hard IRQ handlers (on other CPUs)
+ *      @irq: interrupt number to wait for
+ *
+ *      This function waits for any pending hard IRQ handlers for this
+ *      interrupt to complete before returning. If you use this
+ *      function while holding a resource the IRQ handler may need you
+ *      will deadlock. It does not take associated threaded handlers
+ *      into account.
+ *
+ *      Do not use this for shutdown scenarios where you must be sure
+ *      that all parts (hardirq and threaded handler) have completed.
+ *
+ *      This function may be called - with care - from IRQ context.
+ */
+void synchronize_hardirq(unsigned int irq)
+{
+        struct irq_desc *desc = irq_to_desc(irq);
+
+        if (desc)
+                __synchronize_hardirq(desc);
+}
+EXPORT_SYMBOL(synchronize_hardirq);
+
+/**
+ *      synchronize_irq - wait for pending IRQ handlers (on other CPUs)
+ *      @irq: interrupt number to wait for
+ *
+ *      This function waits for any pending IRQ handlers for this interrupt
+ *      to complete before returning. If you use this function while
+ *      holding a resource the IRQ handler may need you will deadlock.
+ *
+ *      This function may be called - with care - from IRQ context.
+ */
+void synchronize_irq(unsigned int irq)
+{
+        struct irq_desc *desc = irq_to_desc(irq);
+
+        if (desc) {
+                __synchronize_hardirq(desc);
+                /*
+                 * We made sure that no hardirq handler is
+                 * running. Now verify that no threaded handlers are
+                 * active.
+                 */
+                wait_event(desc->wait_for_threads,
+                           !atomic_read(&desc->threads_active));
+        }
 }
 EXPORT_SYMBOL(synchronize_irq);
 
@@ -718,7 +748,7 @@ again:
 
         if (!desc->threads_oneshot && !irqd_irq_disabled(&desc->irq_data) &&
             irqd_irq_masked(&desc->irq_data))
-                unmask_irq(desc);
+                unmask_threaded_irq(desc);
 
 out_unlock:
         raw_spin_unlock_irq(&desc->lock);
@@ -727,7 +757,7 @@ out_unlock:
 
 #ifdef CONFIG_SMP
 /*
- * Check whether we need to chasnge the affinity of the interrupt thread.
+ * Check whether we need to change the affinity of the interrupt thread.
  */
 static void
 irq_thread_check_affinity(struct irq_desc *desc, struct irqaction *action)
@@ -880,6 +910,33 @@ static int irq_thread(void *data)
         return 0;
 }
 
+/**
+ *      irq_wake_thread - wake the irq thread for the action identified by dev_id
+ *      @irq:           Interrupt line
+ *      @dev_id:        Device identity for which the thread should be woken
+ *
+ */
+void irq_wake_thread(unsigned int irq, void *dev_id)
+{
+        struct irq_desc *desc = irq_to_desc(irq);
+        struct irqaction *action;
+        unsigned long flags;
+
+        if (!desc || WARN_ON(irq_settings_is_per_cpu_devid(desc)))
+                return;
+
+        raw_spin_lock_irqsave(&desc->lock, flags);
+        for (action = desc->action; action; action = action->next) {
+                if (action->dev_id == dev_id) {
+                        if (action->thread)
+                                __irq_wake_thread(desc, action);
+                        break;
+                }
+        }
+        raw_spin_unlock_irqrestore(&desc->lock, flags);
+}
+EXPORT_SYMBOL_GPL(irq_wake_thread);
+
 static void irq_setup_forced_threading(struct irqaction *new)
 {
         if (!force_irqthreads)
@@ -896,6 +953,23 @@ static void irq_setup_forced_threading(struct irqaction *new)
         }
 }
 
+static int irq_request_resources(struct irq_desc *desc)
+{
+        struct irq_data *d = &desc->irq_data;
+        struct irq_chip *c = d->chip;
+
+        return c->irq_request_resources ? c->irq_request_resources(d) : 0;
+}
+
+static void irq_release_resources(struct irq_desc *desc)
+{
+        struct irq_data *d = &desc->irq_data;
+        struct irq_chip *c = d->chip;
+
+        if (c->irq_release_resources)
+                c->irq_release_resources(d);
+}
+
 /*
  * Internal function to register an irqaction - typically used to
  * allocate special interrupts that are part of the architecture.
@@ -1091,6 +1165,13 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
         }
 
         if (!shared) {
+                ret = irq_request_resources(desc);
+                if (ret) {
+                        pr_err("Failed to request resources for %s (irq %d) on irqchip %s\n",
+                               new->name, irq, desc->irq_data.chip->name);
+                        goto out_mask;
+                }
+
                 init_waitqueue_head(&desc->wait_for_threads);
 
                 /* Setup the type (level, edge polarity) if configured: */
@@ -1261,8 +1342,10 @@ static struct irqaction *__free_irq(unsigned int irq, void *dev_id)
         *action_ptr = action->next;
 
         /* If this was the last handler, shut down the IRQ line: */
-        if (!desc->action)
+        if (!desc->action) {
                 irq_shutdown(desc);
+                irq_release_resources(desc);
+        }
 
 #ifdef CONFIG_SMP
         /* make sure affinity_hint is cleaned up */
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index 36f6ee181b0c..ac1ba2f11032 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -324,15 +324,15 @@ void register_irq_proc(unsigned int irq, struct irq_desc *desc)
 
 #ifdef CONFIG_SMP
         /* create /proc/irq/<irq>/smp_affinity */
-        proc_create_data("smp_affinity", 0600, desc->dir,
+        proc_create_data("smp_affinity", 0644, desc->dir,
                          &irq_affinity_proc_fops, (void *)(long)irq);
 
         /* create /proc/irq/<irq>/affinity_hint */
-        proc_create_data("affinity_hint", 0400, desc->dir,
+        proc_create_data("affinity_hint", 0444, desc->dir,
                          &irq_affinity_hint_proc_fops, (void *)(long)irq);
 
         /* create /proc/irq/<irq>/smp_affinity_list */
-        proc_create_data("smp_affinity_list", 0600, desc->dir,
+        proc_create_data("smp_affinity_list", 0644, desc->dir,
                          &irq_affinity_list_proc_fops, (void *)(long)irq);
 
         proc_create_data("node", 0444, desc->dir,
@@ -372,7 +372,7 @@ void unregister_handler_proc(unsigned int irq, struct irqaction *action)
 static void register_default_affinity_proc(void)
 {
 #ifdef CONFIG_SMP
-        proc_create("irq/default_smp_affinity", 0600, NULL,
+        proc_create("irq/default_smp_affinity", 0644, NULL,
                     &default_affinity_proc_fops);
 #endif
 }
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 490fcbb1dc5b..b50990a5bea0 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -25,6 +25,7 @@
 #include <linux/smp.h>
 #include <linux/smpboot.h>
 #include <linux/tick.h>
+#include <linux/irq.h>
 
 #define CREATE_TRACE_POINTS
 #include <trace/events/irq.h>