10 files changed, 109 insertions, 50 deletions

diff --git a/arch/x86/kernel/amd_gart_64.c b/arch/x86/kernel/amd_gart_64.c
index b1e7c7f7a0af..e66311200cbd 100644
--- a/arch/x86/kernel/amd_gart_64.c
+++ b/arch/x86/kernel/amd_gart_64.c
@@ -477,7 +477,7 @@ error:
 /* allocate and map a coherent mapping */
 static void *
 gart_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_addr,
-                    gfp_t flag)
+                    gfp_t flag, struct dma_attrs *attrs)
 {
         dma_addr_t paddr;
         unsigned long align_mask;
@@ -500,7 +500,8 @@ gart_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_addr,
                 }
                 __free_pages(page, get_order(size));
         } else
-                return dma_generic_alloc_coherent(dev, size, dma_addr, flag);
+                return dma_generic_alloc_coherent(dev, size, dma_addr, flag,
+                                                  attrs);
 
         return NULL;
 }
@@ -508,7 +509,7 @@ gart_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_addr,
 /* free a coherent mapping */
 static void
 gart_free_coherent(struct device *dev, size_t size, void *vaddr,
-                   dma_addr_t dma_addr)
+                   dma_addr_t dma_addr, struct dma_attrs *attrs)
 {
         gart_unmap_page(dev, dma_addr, size, DMA_BIDIRECTIONAL, NULL);
         free_pages((unsigned long)vaddr, get_order(size));
@@ -700,8 +701,8 @@ static struct dma_map_ops gart_dma_ops = {
         .unmap_sg                       = gart_unmap_sg,
         .map_page                       = gart_map_page,
         .unmap_page                     = gart_unmap_page,
-        .alloc_coherent                 = gart_alloc_coherent,
-        .free_coherent                  = gart_free_coherent,
+        .alloc                          = gart_alloc_coherent,
+        .free                           = gart_free_coherent,
         .mapping_error                  = gart_mapping_error,
 };
 
diff --git a/arch/x86/kernel/cpu/perf_event_p4.c b/arch/x86/kernel/cpu/perf_event_p4.c
index ef484d9d0a25..a2dfacfd7103 100644
--- a/arch/x86/kernel/cpu/perf_event_p4.c
+++ b/arch/x86/kernel/cpu/perf_event_p4.c
@@ -1271,6 +1271,17 @@ done:
         return num ? -EINVAL : 0;
 }
 
+PMU_FORMAT_ATTR(cccr, "config:0-31" );
+PMU_FORMAT_ATTR(escr, "config:32-62");
+PMU_FORMAT_ATTR(ht,   "config:63"   );
+
+static struct attribute *intel_p4_formats_attr[] = {
+        &format_attr_cccr.attr,
+        &format_attr_escr.attr,
+        &format_attr_ht.attr,
+        NULL,
+};
+
 static __initconst const struct x86_pmu p4_pmu = {
         .name                   = "Netburst P4/Xeon",
         .handle_irq             = p4_pmu_handle_irq,
@@ -1305,6 +1316,8 @@ static __initconst const struct x86_pmu p4_pmu = {
          * the former idea is taken from OProfile code
          */
         .perfctr_second_write   = 1,
+
+        .format_attrs           = intel_p4_formats_attr,
 };
 
 __init int p4_pmu_init(void)
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index 7943e0c21bde..3dafc6003b7c 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -282,8 +282,13 @@ void fixup_irqs(void)
                 else if (!(warned++))
                         set_affinity = 0;
 
+                /*
+                 * We unmask if the irq was not marked masked by the
+                 * core code. That respects the lazy irq disable
+                 * behaviour.
+                 */
                 if (!irqd_can_move_in_process_context(data) &&
-                    !irqd_irq_disabled(data) && chip->irq_unmask)
+                    !irqd_irq_masked(data) && chip->irq_unmask)
                         chip->irq_unmask(data);
 
                 raw_spin_unlock(&desc->lock);
diff --git a/arch/x86/kernel/kdebugfs.c b/arch/x86/kernel/kdebugfs.c
index 90fcf62854bb..1d5d31ea686b 100644
--- a/arch/x86/kernel/kdebugfs.c
+++ b/arch/x86/kernel/kdebugfs.c
@@ -68,16 +68,9 @@ static ssize_t setup_data_read(struct file *file, char __user *user_buf,
         return count;
 }
 
-static int setup_data_open(struct inode *inode, struct file *file)
-{
-        file->private_data = inode->i_private;
-
-        return 0;
-}
-
 static const struct file_operations fops_setup_data = {
         .read           = setup_data_read,
-        .open           = setup_data_open,
+        .open           = simple_open,
         .llseek         = default_llseek,
 };
 
diff --git a/arch/x86/kernel/kgdb.c b/arch/x86/kernel/kgdb.c
index db6720edfdd0..8bfb6146f753 100644
--- a/arch/x86/kernel/kgdb.c
+++ b/arch/x86/kernel/kgdb.c
@@ -43,6 +43,8 @@
 #include <linux/smp.h>
 #include <linux/nmi.h>
 #include <linux/hw_breakpoint.h>
+#include <linux/uaccess.h>
+#include <linux/memory.h>
 
 #include <asm/debugreg.h>
 #include <asm/apicdef.h>
@@ -741,6 +743,64 @@ void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long ip)
         regs->ip = ip;
 }
 
+int kgdb_arch_set_breakpoint(struct kgdb_bkpt *bpt)
+{
+        int err;
+        char opc[BREAK_INSTR_SIZE];
+
+        bpt->type = BP_BREAKPOINT;
+        err = probe_kernel_read(bpt->saved_instr, (char *)bpt->bpt_addr,
+                                BREAK_INSTR_SIZE);
+        if (err)
+                return err;
+        err = probe_kernel_write((char *)bpt->bpt_addr,
+                                 arch_kgdb_ops.gdb_bpt_instr, BREAK_INSTR_SIZE);
+#ifdef CONFIG_DEBUG_RODATA
+        if (!err)
+                return err;
+        /*
+         * It is safe to call text_poke() because normal kernel execution
+         * is stopped on all cores, so long as the text_mutex is not locked.
+         */
+        if (mutex_is_locked(&text_mutex))
+                return -EBUSY;
+        text_poke((void *)bpt->bpt_addr, arch_kgdb_ops.gdb_bpt_instr,
+                  BREAK_INSTR_SIZE);
+        err = probe_kernel_read(opc, (char *)bpt->bpt_addr, BREAK_INSTR_SIZE);
+        if (err)
+                return err;
+        if (memcmp(opc, arch_kgdb_ops.gdb_bpt_instr, BREAK_INSTR_SIZE))
+                return -EINVAL;
+        bpt->type = BP_POKE_BREAKPOINT;
+#endif /* CONFIG_DEBUG_RODATA */
+        return err;
+}
+
+int kgdb_arch_remove_breakpoint(struct kgdb_bkpt *bpt)
+{
+#ifdef CONFIG_DEBUG_RODATA
+        int err;
+        char opc[BREAK_INSTR_SIZE];
+
+        if (bpt->type != BP_POKE_BREAKPOINT)
+                goto knl_write;
+        /*
+         * It is safe to call text_poke() because normal kernel execution
+         * is stopped on all cores, so long as the text_mutex is not locked.
+         */
+        if (mutex_is_locked(&text_mutex))
+                goto knl_write;
+        text_poke((void *)bpt->bpt_addr, bpt->saved_instr, BREAK_INSTR_SIZE);
+        err = probe_kernel_read(opc, (char *)bpt->bpt_addr, BREAK_INSTR_SIZE);
+        if (err || memcmp(opc, bpt->saved_instr, BREAK_INSTR_SIZE))
+                goto knl_write;
+        return err;
+knl_write:
+#endif /* CONFIG_DEBUG_RODATA */
+        return probe_kernel_write((char *)bpt->bpt_addr,
+                                  (char *)bpt->saved_instr, BREAK_INSTR_SIZE);
+}
+
 struct kgdb_arch arch_kgdb_ops = {
         /* Breakpoint instruction: */
         .gdb_bpt_instr          = { 0xcc },
diff --git a/arch/x86/kernel/pci-calgary_64.c b/arch/x86/kernel/pci-calgary_64.c
index 6ac5782f4d6b..d0b2fb9ccbb1 100644
--- a/arch/x86/kernel/pci-calgary_64.c
+++ b/arch/x86/kernel/pci-calgary_64.c
@@ -430,7 +430,7 @@ static void calgary_unmap_page(struct device *dev, dma_addr_t dma_addr,
 }
 
 static void* calgary_alloc_coherent(struct device *dev, size_t size,
-        dma_addr_t *dma_handle, gfp_t flag)
+        dma_addr_t *dma_handle, gfp_t flag, struct dma_attrs *attrs)
 {
         void *ret = NULL;
         dma_addr_t mapping;
@@ -463,7 +463,8 @@ error:
 }
 
 static void calgary_free_coherent(struct device *dev, size_t size,
-                                  void *vaddr, dma_addr_t dma_handle)
+                                  void *vaddr, dma_addr_t dma_handle,
+                                  struct dma_attrs *attrs)
 {
         unsigned int npages;
         struct iommu_table *tbl = find_iommu_table(dev);
@@ -476,8 +477,8 @@ static void calgary_free_coherent(struct device *dev, size_t size,
 }
 
 static struct dma_map_ops calgary_dma_ops = {
-        .alloc_coherent = calgary_alloc_coherent,
-        .free_coherent = calgary_free_coherent,
+        .alloc = calgary_alloc_coherent,
+        .free = calgary_free_coherent,
         .map_sg = calgary_map_sg,
         .unmap_sg = calgary_unmap_sg,
         .map_page = calgary_map_page,
diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index 28e5e06fcba4..3003250ac51d 100644
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -96,7 +96,8 @@ void __init pci_iommu_alloc(void)
         }
 }
 void *dma_generic_alloc_coherent(struct device *dev, size_t size,
-                                 dma_addr_t *dma_addr, gfp_t flag)
+                                 dma_addr_t *dma_addr, gfp_t flag,
+                                 struct dma_attrs *attrs)
 {
         unsigned long dma_mask;
         struct page *page;
diff --git a/arch/x86/kernel/pci-nommu.c b/arch/x86/kernel/pci-nommu.c
index 3af4af810c07..f96050685b46 100644
--- a/arch/x86/kernel/pci-nommu.c
+++ b/arch/x86/kernel/pci-nommu.c
@@ -75,7 +75,7 @@ static int nommu_map_sg(struct device *hwdev, struct scatterlist *sg,
 }
 
 static void nommu_free_coherent(struct device *dev, size_t size, void *vaddr,
-                                dma_addr_t dma_addr)
+                                dma_addr_t dma_addr, struct dma_attrs *attrs)
 {
         free_pages((unsigned long)vaddr, get_order(size));
 }
@@ -96,8 +96,8 @@ static void nommu_sync_sg_for_device(struct device *dev,
 }
 
 struct dma_map_ops nommu_dma_ops = {
-        .alloc_coherent         = dma_generic_alloc_coherent,
-        .free_coherent          = nommu_free_coherent,
+        .alloc                  = dma_generic_alloc_coherent,
+        .free                   = nommu_free_coherent,
         .map_sg                 = nommu_map_sg,
         .map_page               = nommu_map_page,
         .sync_single_for_device = nommu_sync_single_for_device,
diff --git a/arch/x86/kernel/pci-swiotlb.c b/arch/x86/kernel/pci-swiotlb.c
index 8f972cbddef0..6c483ba98b9c 100644
--- a/arch/x86/kernel/pci-swiotlb.c
+++ b/arch/x86/kernel/pci-swiotlb.c
@@ -15,21 +15,30 @@
 int swiotlb __read_mostly;
 
 static void *x86_swiotlb_alloc_coherent(struct device *hwdev, size_t size,
-                                        dma_addr_t *dma_handle, gfp_t flags)
+                                        dma_addr_t *dma_handle, gfp_t flags,
+                                        struct dma_attrs *attrs)
 {
         void *vaddr;
 
-        vaddr = dma_generic_alloc_coherent(hwdev, size, dma_handle, flags);
+        vaddr = dma_generic_alloc_coherent(hwdev, size, dma_handle, flags,
+                                           attrs);
         if (vaddr)
                 return vaddr;
 
         return swiotlb_alloc_coherent(hwdev, size, dma_handle, flags);
 }
 
+static void x86_swiotlb_free_coherent(struct device *dev, size_t size,
+                                      void *vaddr, dma_addr_t dma_addr,
+                                      struct dma_attrs *attrs)
+{
+        swiotlb_free_coherent(dev, size, vaddr, dma_addr);
+}
+
 static struct dma_map_ops swiotlb_dma_ops = {
         .mapping_error = swiotlb_dma_mapping_error,
-        .alloc_coherent = x86_swiotlb_alloc_coherent,
-        .free_coherent = swiotlb_free_coherent,
+        .alloc = x86_swiotlb_alloc_coherent,
+        .free = x86_swiotlb_free_coherent,
         .sync_single_for_cpu = swiotlb_sync_single_for_cpu,
         .sync_single_for_device = swiotlb_sync_single_for_device,
         .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index a33afaa5ddb7..1d92a5ab6e8b 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -362,34 +362,10 @@ void (*pm_idle)(void);
 EXPORT_SYMBOL(pm_idle);
 #endif
 
-#ifdef CONFIG_X86_32
-/*
- * This halt magic was a workaround for ancient floppy DMA
- * wreckage. It should be safe to remove.
- */
-static int hlt_counter;
-void disable_hlt(void)
-{
-        hlt_counter++;
-}
-EXPORT_SYMBOL(disable_hlt);
-
-void enable_hlt(void)
-{
-        hlt_counter--;
-}
-EXPORT_SYMBOL(enable_hlt);
-
-static inline int hlt_use_halt(void)
-{
-        return (!hlt_counter && boot_cpu_data.hlt_works_ok);
-}
-#else
 static inline int hlt_use_halt(void)
 {
         return 1;
 }
-#endif
 
 #ifndef CONFIG_SMP
 static inline void play_dead(void)