Merge branch 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 fixes from Peter Anvin:
 "This series fixes a couple of build failures, and fixes MTRR cleanup
  and memory setup on very specific memory maps.

  Finally, it fixes triggering backtraces on all CPUs, which was
  inadvertently disabled on x86."

* 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/efi: Fix dummy variable buffer allocation
  x86: Fix trigger_all_cpu_backtrace() implementation
  x86: Fix section mismatch on load_ucode_ap
  x86: fix build error and kconfig for ia32_emulation and binfmt
  range: Do not add new blank slot with add_range_with_merge
  x86, mtrr: Fix original mtrr range get for mtrr_cleanup

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 685692c94f051a8a7ad582442efcc3fa11173332..fe120da25625b23ef52c74b479bf715f265261b4 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2265,6 +2265,7 @@ source "fs/Kconfig.binfmt"
 config IA32_EMULATION
        bool "IA32 Emulation"
        depends on X86_64
+       select BINFMT_ELF
        select COMPAT_BINFMT_ELF
        select HAVE_UID16
        ---help---

diff --git a/arch/x86/include/asm/irq.h b/arch/x86/include/asm/irq.h
index ba870bb6dd8ef30ab81a317a8eb43dcb83066630..57873beb32927426b3f5c5c97284729195d2c2e5 100644 (file)
--- a/arch/x86/include/asm/irq.h
+++ b/arch/x86/include/asm/irq.h
@@ -41,4 +41,9 @@ extern int vector_used_by_percpu_irq(unsigned int vector);
 
 extern void init_ISA_irqs(void);
 
+#ifdef CONFIG_X86_LOCAL_APIC
+void arch_trigger_all_cpu_backtrace(void);
+#define arch_trigger_all_cpu_backtrace arch_trigger_all_cpu_backtrace
+#endif
+
 #endif /* _ASM_X86_IRQ_H */

diff --git a/arch/x86/include/asm/microcode.h b/arch/x86/include/asm/microcode.h
index 6825e2efd1b411fdc8090e8218f391a93a8b6b91..6bc3985ee473d52ae74f16a2cec2e1fbd2fb693f 100644 (file)
--- a/arch/x86/include/asm/microcode.h
+++ b/arch/x86/include/asm/microcode.h
@@ -60,11 +60,11 @@ static inline void __exit exit_amd_microcode(void) {}
 #ifdef CONFIG_MICROCODE_EARLY
 #define MAX_UCODE_COUNT 128
 extern void __init load_ucode_bsp(void);
-extern __init void load_ucode_ap(void);
+extern void __cpuinit load_ucode_ap(void);
 extern int __init save_microcode_in_initrd(void);
 #else
 static inline void __init load_ucode_bsp(void) {}
-static inline __init void load_ucode_ap(void) {}
+static inline void __cpuinit load_ucode_ap(void) {}
 static inline int __init save_microcode_in_initrd(void)
 {
        return 0;

diff --git a/arch/x86/include/asm/nmi.h b/arch/x86/include/asm/nmi.h
index c0fa356e90de24ea60ba8a0ac90c39e6bb05d73b..86f9301903c818c632b227537b44142b71883c8d 100644 (file)
--- a/arch/x86/include/asm/nmi.h
+++ b/arch/x86/include/asm/nmi.h
@@ -18,9 +18,7 @@ extern int proc_nmi_enabled(struct ctl_table *, int ,
                        void __user *, size_t *, loff_t *);
 extern int unknown_nmi_panic;
 
-void arch_trigger_all_cpu_backtrace(void);
-#define arch_trigger_all_cpu_backtrace arch_trigger_all_cpu_backtrace
-#endif
+#endif /* CONFIG_X86_LOCAL_APIC */
 
 #define NMI_FLAG_FIRST 1
 

diff --git a/arch/x86/kernel/apic/hw_nmi.c b/arch/x86/kernel/apic/hw_nmi.c
index 31cb9ae992b7d7921b03bd6173068bae3138a06e..a698d7165c96a5b8fc0c08c8ee7f419b52933b08 100644 (file)
--- a/arch/x86/kernel/apic/hw_nmi.c
+++ b/arch/x86/kernel/apic/hw_nmi.c
@@ -9,6 +9,7 @@
  *
  */
 #include <asm/apic.h>
+#include <asm/nmi.h>
 
 #include <linux/cpumask.h>
 #include <linux/kdebug.h>

diff --git a/arch/x86/kernel/cpu/mtrr/cleanup.c b/arch/x86/kernel/cpu/mtrr/cleanup.c
index 35ffda5d0727d19b11cccccdde0e0d461b9e15ee..5f90b85ff22e584be8d1d7eb1615acde7584b397 100644 (file)
--- a/arch/x86/kernel/cpu/mtrr/cleanup.c
+++ b/arch/x86/kernel/cpu/mtrr/cleanup.c
@@ -714,15 +714,15 @@ int __init mtrr_cleanup(unsigned address_bits)
        if (mtrr_tom2)
                x_remove_size = (mtrr_tom2 >> PAGE_SHIFT) - x_remove_base;
 
-       nr_range = x86_get_mtrr_mem_range(range, 0, x_remove_base, x_remove_size);
        /*
         * [0, 1M) should always be covered by var mtrr with WB
         * and fixed mtrrs should take effect before var mtrr for it:
         */
-       nr_range = add_range_with_merge(range, RANGE_NUM, nr_range, 0,
+       nr_range = add_range_with_merge(range, RANGE_NUM, 0, 0,
                                        1ULL<<(20 - PAGE_SHIFT));
-       /* Sort the ranges: */
-       sort_range(range, nr_range);
+       /* add from var mtrr at last */
+       nr_range = x86_get_mtrr_mem_range(range, nr_range,
+                                         x_remove_base, x_remove_size);
 
        range_sums = sum_ranges(range, nr_range);
        printk(KERN_INFO "total RAM covered: %ldM\n",

diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index 5ae2eb09419ec54d2ac7618904c31d961149df43..d2fbcedcf6eaf2fd77179075c1be2c5c4d3d8347 100644 (file)
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -1069,7 +1069,10 @@ efi_status_t efi_query_variable_store(u32 attributes, unsigned long size)
                 * that by attempting to use more space than is available.
                 */
                unsigned long dummy_size = remaining_size + 1024;
-               void *dummy = kmalloc(dummy_size, GFP_ATOMIC);
+               void *dummy = kzalloc(dummy_size, GFP_ATOMIC);
+
+               if (!dummy)
+                       return EFI_OUT_OF_RESOURCES;
 
                status = efi.set_variable(efi_dummy_name, &EFI_DUMMY_GUID,
                                          EFI_VARIABLE_NON_VOLATILE |
@@ -1089,6 +1092,8 @@ efi_status_t efi_query_variable_store(u32 attributes, unsigned long size)
                                         0, dummy);
                }
 
+               kfree(dummy);
+
                /*
                 * The runtime code may now have triggered a garbage collection
                 * run, so check the variable info again

diff --git a/kernel/range.c b/kernel/range.c
index eb911dbce2679d29fea7226084be73d34a7336dd..322ea8e93e4ba36c11c0348a34c12e58c983da03 100644 (file)
--- a/kernel/range.c
+++ b/kernel/range.c
@@ -4,7 +4,7 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/sort.h>
-
+#include <linux/string.h>
 #include <linux/range.h>
 
 int add_range(struct range *range, int az, int nr_range, u64 start, u64 end)
@@ -32,9 +32,8 @@ int add_range_with_merge(struct range *range, int az, int nr_range,
        if (start >= end)
                return nr_range;
 
-       /* Try to merge it with old one: */
+       /* get new start/end: */
        for (i = 0; i < nr_range; i++) {
-               u64 final_start, final_end;
                u64 common_start, common_end;
 
                if (!range[i].end)
@@ -45,14 +44,16 @@ int add_range_with_merge(struct range *range, int az, int nr_range,
                if (common_start > common_end)
                        continue;
 
-               final_start = min(range[i].start, start);
-               final_end = max(range[i].end, end);
+               /* new start/end, will add it back at last */
+               start = min(range[i].start, start);
+               end = max(range[i].end, end);
 
-               /* clear it and add it back for further merge */
-               range[i].start = 0;
-               range[i].end =  0;
-               return add_range_with_merge(range, az, nr_range,
-                       final_start, final_end);
+               memmove(&range[i], &range[i + 1],
+                       (nr_range - (i + 1)) * sizeof(range[i]));
+               range[nr_range - 1].start = 0;
+               range[nr_range - 1].end   = 0;
+               nr_range--;
+               i--;
        }
 
        /* Need to add it: */