12 files changed, 58 insertions, 24 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 4af7ab03266..187282da921 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -594,6 +594,16 @@ S:	Maintained
 F:      arch/arm/lib/floppydma.S
 F:      arch/arm/include/asm/floppy.h
 
+ARM PMU PROFILING AND DEBUGGING
+M:      Will Deacon <will.deacon@arm.com>
+S:      Maintained
+F:      arch/arm/kernel/perf_event*
+F:      arch/arm/oprofile/common.c
+F:      arch/arm/kernel/pmu.c
+F:      arch/arm/include/asm/pmu.h
+F:      arch/arm/kernel/hw_breakpoint.c
+F:      arch/arm/include/asm/hw_breakpoint.h
+
 ARM PORT
 M:      Russell King <linux@arm.linux.org.uk>
 L:      linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
diff --git a/arch/arm/common/dmabounce.c b/arch/arm/common/dmabounce.c
index e5681636626..841df7d21c2 100644
--- a/arch/arm/common/dmabounce.c
+++ b/arch/arm/common/dmabounce.c
@@ -255,7 +255,7 @@ static inline dma_addr_t map_single(struct device *dev, void *ptr, size_t size,
                 if (buf == 0) {
                         dev_err(dev, "%s: unable to map unsafe buffer %p!\n",
                                __func__, ptr);
-                        return 0;
+                        return ~0;
                 }
 
                 dev_dbg(dev,
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
index d53c0abc4dd..2b5b1421596 100644
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -583,7 +583,7 @@ static int armpmu_event_init(struct perf_event *event)
 static void armpmu_enable(struct pmu *pmu)
 {
         /* Enable all of the perf events on hardware. */
-        int idx;
+        int idx, enabled = 0;
         struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
 
         if (!armpmu)
@@ -596,9 +596,11 @@ static void armpmu_enable(struct pmu *pmu)
                         continue;
 
                 armpmu->enable(&event->hw, idx);
+                enabled = 1;
         }
 
-        armpmu->start();
+        if (enabled)
+                armpmu->start();
 }
 
 static void armpmu_disable(struct pmu *pmu)
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index ed11fb08b05..acbb447ac6b 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -73,6 +73,7 @@ __setup("fpe=", fpe_setup);
 #endif
 
 extern void paging_init(struct machine_desc *desc);
+extern void sanity_check_meminfo(void);
 extern void reboot_setup(char *str);
 
 unsigned int processor_id;
@@ -900,6 +901,7 @@ void __init setup_arch(char **cmdline_p)
 
         parse_early_param();
 
+        sanity_check_meminfo();
         arm_memblock_init(&meminfo, mdesc);
 
         paging_init(mdesc);
diff --git a/arch/arm/kernel/smp_twd.c b/arch/arm/kernel/smp_twd.c
index 60636f499cb..2c277d40cee 100644
--- a/arch/arm/kernel/smp_twd.c
+++ b/arch/arm/kernel/smp_twd.c
@@ -115,7 +115,7 @@ static void __cpuinit twd_calibrate_rate(void)
                 twd_timer_rate = (0xFFFFFFFFU - count) * (HZ / 5);
 
                 printk("%lu.%02luMHz.\n", twd_timer_rate / 1000000,
-                        (twd_timer_rate / 1000000) % 100);
+                        (twd_timer_rate / 10000) % 100);
         }
 }
 
diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
index 1d4b65fd673..6659a0d137a 100644
--- a/arch/arm/mach-ep93xx/core.c
+++ b/arch/arm/mach-ep93xx/core.c
@@ -251,9 +251,9 @@ static void ep93xx_uart_set_mctrl(struct amba_device *dev,
         unsigned int mcr;
 
         mcr = 0;
-        if (!(mctrl & TIOCM_RTS))
+        if (mctrl & TIOCM_RTS)
                 mcr |= 2;
-        if (!(mctrl & TIOCM_DTR))
+        if (mctrl & TIOCM_DTR)
                 mcr |= 1;
 
         __raw_writel(mcr, base + EP93XX_UART_MCR_OFFSET);
diff --git a/arch/arm/mach-vt8500/irq.c b/arch/arm/mach-vt8500/irq.c
index 245140c0df1..642de0408f2 100644
--- a/arch/arm/mach-vt8500/irq.c
+++ b/arch/arm/mach-vt8500/irq.c
@@ -39,9 +39,10 @@
 static void __iomem *ic_regbase;
 static void __iomem *sic_regbase;
 
-static void vt8500_irq_mask(unsigned int irq)
+static void vt8500_irq_mask(struct irq_data *d)
 {
         void __iomem *base = ic_regbase;
+        unsigned irq = d->irq;
         u8 edge;
 
         if (irq >= 64) {
@@ -64,9 +65,10 @@ static void vt8500_irq_mask(unsigned int irq)
         }
 }
 
-static void vt8500_irq_unmask(unsigned int irq)
+static void vt8500_irq_unmask(struct irq_data *d)
 {
         void __iomem *base = ic_regbase;
+        unsigned irq = d->irq;
         u8 dctr;
 
         if (irq >= 64) {
@@ -78,10 +80,11 @@ static void vt8500_irq_unmask(unsigned int irq)
         writeb(dctr, base + VT8500_IC_DCTR + irq);
 }
 
-static int vt8500_irq_set_type(unsigned int irq, unsigned int flow_type)
+static int vt8500_irq_set_type(struct irq_data *d, unsigned int flow_type)
 {
         void __iomem *base = ic_regbase;
-        unsigned int orig_irq = irq;
+        unsigned irq = d->irq;
+        unsigned orig_irq = irq;
         u8 dctr;
 
         if (irq >= 64) {
@@ -114,11 +117,11 @@ static int vt8500_irq_set_type(unsigned int irq, unsigned int flow_type)
 }
 
 static struct irq_chip vt8500_irq_chip = {
-        .name      = "vt8500",
-        .ack       = vt8500_irq_mask,
-        .mask      = vt8500_irq_mask,
-        .unmask    = vt8500_irq_unmask,
-        .set_type  = vt8500_irq_set_type,
+        .name = "vt8500",
+        .irq_ack = vt8500_irq_mask,
+        .irq_mask = vt8500_irq_mask,
+        .irq_unmask = vt8500_irq_unmask,
+        .irq_set_type = vt8500_irq_set_type,
 };
 
 void __init vt8500_init_irq(void)
diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c
index ef59099a546..44c086710d2 100644
--- a/arch/arm/mm/cache-l2x0.c
+++ b/arch/arm/mm/cache-l2x0.c
@@ -120,17 +120,22 @@ static void l2x0_cache_sync(void)
         spin_unlock_irqrestore(&l2x0_lock, flags);
 }
 
-static void l2x0_flush_all(void)
+static void __l2x0_flush_all(void)
 {
-        unsigned long flags;
-
-        /* clean all ways */
-        spin_lock_irqsave(&l2x0_lock, flags);
         debug_writel(0x03);
         writel_relaxed(l2x0_way_mask, l2x0_base + L2X0_CLEAN_INV_WAY);
         cache_wait_way(l2x0_base + L2X0_CLEAN_INV_WAY, l2x0_way_mask);
         cache_sync();
         debug_writel(0x00);
+}
+
+static void l2x0_flush_all(void)
+{
+        unsigned long flags;
+
+        /* clean all ways */
+        spin_lock_irqsave(&l2x0_lock, flags);
+        __l2x0_flush_all();
         spin_unlock_irqrestore(&l2x0_lock, flags);
 }
 
@@ -266,7 +271,9 @@ static void l2x0_disable(void)
         unsigned long flags;
 
         spin_lock_irqsave(&l2x0_lock, flags);
-        writel(0, l2x0_base + L2X0_CTRL);
+        __l2x0_flush_all();
+        writel_relaxed(0, l2x0_base + L2X0_CTRL);
+        dsb();
         spin_unlock_irqrestore(&l2x0_lock, flags);
 }
 
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 9d9e736c2b4..594d677b92c 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -759,7 +759,7 @@ early_param("vmalloc", early_vmalloc);
 
 static phys_addr_t lowmem_limit __initdata = 0;
 
-static void __init sanity_check_meminfo(void)
+void __init sanity_check_meminfo(void)
 {
         int i, j, highmem = 0;
 
@@ -1032,8 +1032,9 @@ void __init paging_init(struct machine_desc *mdesc)
 {
         void *zero_page;
 
+        memblock_set_current_limit(lowmem_limit);
+
         build_mem_type_table();
-        sanity_check_meminfo();
         prepare_page_table();
         map_lowmem();
         devicemaps_init(mdesc);
diff --git a/arch/arm/mm/nommu.c b/arch/arm/mm/nommu.c
index 687d02319a4..941a98c9e8a 100644
--- a/arch/arm/mm/nommu.c
+++ b/arch/arm/mm/nommu.c
@@ -27,6 +27,10 @@ void __init arm_mm_memblock_reserve(void)
         memblock_reserve(CONFIG_VECTORS_BASE, PAGE_SIZE);
 }
 
+void __init sanity_check_meminfo(void)
+{
+}
+
 /*
  * paging_init() sets up the page tables, initialises the zone memory
  * maps, and sets up the zero page, bad page and bad page tables.
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 7721de942c6..fe140724a02 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -582,6 +582,8 @@ mmci_data_irq(struct mmci_host *host, struct mmc_data *data,
                         data->error = -EILSEQ;
                 } else if (status & MCI_DATATIMEOUT) {
                         data->error = -ETIMEDOUT;
+                } else if (status & MCI_STARTBITERR) {
+                        data->error = -ECOMM;
                 } else if (status & MCI_TXUNDERRUN) {
                         data->error = -EIO;
                 } else if (status & MCI_RXOVERRUN) {
diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
index bb32e21c09d..2164e8c6476 100644
--- a/drivers/mmc/host/mmci.h
+++ b/drivers/mmc/host/mmci.h
@@ -86,6 +86,7 @@
 #define MCI_CMDRESPEND          (1 << 6)
 #define MCI_CMDSENT             (1 << 7)
 #define MCI_DATAEND             (1 << 8)
+#define MCI_STARTBITERR         (1 << 9)
 #define MCI_DATABLOCKEND        (1 << 10)
 #define MCI_CMDACTIVE           (1 << 11)
 #define MCI_TXACTIVE            (1 << 12)
@@ -112,6 +113,7 @@
 #define MCI_CMDRESPENDCLR       (1 << 6)
 #define MCI_CMDSENTCLR          (1 << 7)
 #define MCI_DATAENDCLR          (1 << 8)
+#define MCI_STARTBITERRCLR      (1 << 9)
 #define MCI_DATABLOCKENDCLR     (1 << 10)
 /* Extended status bits for the ST Micro variants */
 #define MCI_ST_SDIOITC          (1 << 22)
@@ -127,6 +129,7 @@
 #define MCI_CMDRESPENDMASK      (1 << 6)
 #define MCI_CMDSENTMASK         (1 << 7)
 #define MCI_DATAENDMASK         (1 << 8)
+#define MCI_STARTBITERRMASK     (1 << 9)
 #define MCI_DATABLOCKENDMASK    (1 << 10)
 #define MCI_CMDACTIVEMASK       (1 << 11)
 #define MCI_TXACTIVEMASK        (1 << 12)
@@ -150,7 +153,7 @@
 #define MCI_IRQENABLE   \
         (MCI_CMDCRCFAILMASK|MCI_DATACRCFAILMASK|MCI_CMDTIMEOUTMASK|     \
         MCI_DATATIMEOUTMASK|MCI_TXUNDERRUNMASK|MCI_RXOVERRUNMASK|       \
-        MCI_CMDRESPENDMASK|MCI_CMDSENTMASK)
+        MCI_CMDRESPENDMASK|MCI_CMDSENTMASK|MCI_STARTBITERRMASK)
 
 /* These interrupts are directed to IRQ1 when two IRQ lines are available */
 #define MCI_IRQ1MASK \