4 files changed, 9 insertions, 6 deletions

diff --git a/arch/x86_64/Makefile b/arch/x86_64/Makefile
index 128561d3e876..b024e4a86895 100644
--- a/arch/x86_64/Makefile
+++ b/arch/x86_64/Makefile
@@ -57,8 +57,8 @@ cflags-y += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)
 cflags-y += -maccumulate-outgoing-args
 
 # do binutils support CFI?
-cflags-y += $(call as-instr,.cfi_startproc\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
-AFLAGS += $(call as-instr,.cfi_startproc\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
+cflags-y += $(call as-instr,.cfi_startproc\n.cfi_rel_offset rsp${comma}0\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
+AFLAGS += $(call as-instr,.cfi_startproc\n.cfi_rel_offset rsp${comma}0\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
 
 # is .cfi_signal_frame supported too?
 cflags-y += $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1,)
diff --git a/arch/x86_64/kernel/head.S b/arch/x86_64/kernel/head.S
index e89abcdbdde8..b6167fe3330e 100644
--- a/arch/x86_64/kernel/head.S
+++ b/arch/x86_64/kernel/head.S
@@ -345,8 +345,7 @@ NEXT_PAGE(level2_kernel_pgt)
         /* 40MB kernel mapping. The kernel code cannot be bigger than that.
            When you change this change KERNEL_TEXT_SIZE in page.h too. */
         /* (2^48-(2*1024*1024*1024)-((2^39)*511)-((2^30)*510)) = 0 */
-        PMDS(0x0000000000000000, __PAGE_KERNEL_LARGE_EXEC|_PAGE_GLOBAL,
-                KERNEL_TEXT_SIZE/PMD_SIZE)
+        PMDS(0x0000000000000000, __PAGE_KERNEL_LARGE_EXEC|_PAGE_GLOBAL, KERNEL_TEXT_SIZE/PMD_SIZE)
         /* Module mapping starts here */
         .fill   (PTRS_PER_PMD - (KERNEL_TEXT_SIZE/PMD_SIZE)),8,0
 
diff --git a/arch/x86_64/kernel/nmi.c b/arch/x86_64/kernel/nmi.c
index cb8ee9d02f86..0ec6d2ddb931 100644
--- a/arch/x86_64/kernel/nmi.c
+++ b/arch/x86_64/kernel/nmi.c
@@ -85,7 +85,7 @@ int __init check_nmi_watchdog (void)
         int *counts;
         int cpu;
 
-        if ((nmi_watchdog == NMI_NONE) || (nmi_watchdog == NMI_DEFAULT))
+        if ((nmi_watchdog == NMI_NONE) || (nmi_watchdog == NMI_DISABLED)) 
                 return 0;
 
         if (!atomic_read(&nmi_active))
@@ -442,7 +442,7 @@ int proc_nmi_enabled(struct ctl_table *table, int write, struct file *file,
         if (!!old_state == !!nmi_watchdog_enabled)
                 return 0;
 
-        if (atomic_read(&nmi_active) < 0) {
+        if (atomic_read(&nmi_active) < 0 || nmi_watchdog == NMI_DISABLED) {
                 printk( KERN_WARNING "NMI watchdog is permanently disabled\n");
                 return -EIO;
         }
diff --git a/arch/x86_64/kernel/pci-dma.c b/arch/x86_64/kernel/pci-dma.c
index 05d745ede561..29711445c818 100644
--- a/arch/x86_64/kernel/pci-dma.c
+++ b/arch/x86_64/kernel/pci-dma.c
@@ -82,6 +82,10 @@ dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
         if (dma_mask == 0)
                 dma_mask = DMA_32BIT_MASK;
 
+        /* Device not DMA able */
+        if (dev->dma_mask == NULL)
+                return NULL;
+
         /* Don't invoke OOM killer */
         gfp |= __GFP_NORETRY;