提交 f71194a7 编写于 作者: L Linus Torvalds

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
......@@ -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---
......
......@@ -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 */
......@@ -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;
......
......@@ -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
......
......@@ -9,6 +9,7 @@
*
*/
#include <asm/apic.h>
#include <asm/nmi.h>
#include <linux/cpumask.h>
#include <linux/kdebug.h>
......
......@@ -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",
......
......@@ -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
......
......@@ -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: */
......
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