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authorLinus Torvalds <torvalds@linux-foundation.org>2009-12-14 12:36:46 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-14 12:36:46 -0800
commit75b08038ceb62f3bd8935346679920f97c3cf9f6 (patch)
tree66cbc62bb569996c90877bbf010285828f669c9a /arch/x86/lib
parentfb1beb29b5c531b12485d7c32174a77120590481 (diff)
parent70fe440718d9f42bf963c2cffe12008eb5556165 (diff)
Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, mce: Clean up thermal init by introducing intel_thermal_supported() x86, mce: Thermal monitoring depends on APIC being enabled x86: Gart: fix breakage due to IOMMU initialization cleanup x86: Move swiotlb initialization before dma32_free_bootmem x86: Fix build warning in arch/x86/mm/mmio-mod.c x86: Remove usedac in feature-removal-schedule.txt x86: Fix duplicated UV BAU interrupt vector nvram: Fix write beyond end condition; prove to gcc copy is safe mm: Adjust do_pages_stat() so gcc can see copy_from_user() is safe x86: Limit the number of processor bootup messages x86: Remove enabling x2apic message for every CPU doc: Add documentation for bootloader_{type,version} x86, msr: Add support for non-contiguous cpumasks x86: Use find_e820() instead of hard coded trampoline address x86, AMD: Fix stale cpuid4_info shared_map data in shared_cpu_map cpumasks Trivial percpu-naming-introduced conflicts in arch/x86/kernel/cpu/intel_cacheinfo.c
Diffstat (limited to 'arch/x86/lib')
-rw-r--r--arch/x86/lib/msr.c26
1 files changed, 22 insertions, 4 deletions
diff --git a/arch/x86/lib/msr.c b/arch/x86/lib/msr.c
index 41628b104b9e..872834177937 100644
--- a/arch/x86/lib/msr.c
+++ b/arch/x86/lib/msr.c
@@ -7,7 +7,6 @@ struct msr_info {
u32 msr_no;
struct msr reg;
struct msr *msrs;
- int off;
int err;
};
@@ -18,7 +17,7 @@ static void __rdmsr_on_cpu(void *info)
int this_cpu = raw_smp_processor_id();
if (rv->msrs)
- reg = &rv->msrs[this_cpu - rv->off];
+ reg = per_cpu_ptr(rv->msrs, this_cpu);
else
reg = &rv->reg;
@@ -32,7 +31,7 @@ static void __wrmsr_on_cpu(void *info)
int this_cpu = raw_smp_processor_id();
if (rv->msrs)
- reg = &rv->msrs[this_cpu - rv->off];
+ reg = per_cpu_ptr(rv->msrs, this_cpu);
else
reg = &rv->reg;
@@ -80,7 +79,6 @@ static void __rwmsr_on_cpus(const struct cpumask *mask, u32 msr_no,
memset(&rv, 0, sizeof(rv));
- rv.off = cpumask_first(mask);
rv.msrs = msrs;
rv.msr_no = msr_no;
@@ -120,6 +118,26 @@ void wrmsr_on_cpus(const struct cpumask *mask, u32 msr_no, struct msr *msrs)
}
EXPORT_SYMBOL(wrmsr_on_cpus);
+struct msr *msrs_alloc(void)
+{
+ struct msr *msrs = NULL;
+
+ msrs = alloc_percpu(struct msr);
+ if (!msrs) {
+ pr_warning("%s: error allocating msrs\n", __func__);
+ return NULL;
+ }
+
+ return msrs;
+}
+EXPORT_SYMBOL(msrs_alloc);
+
+void msrs_free(struct msr *msrs)
+{
+ free_percpu(msrs);
+}
+EXPORT_SYMBOL(msrs_free);
+
/* These "safe" variants are slower and should be used when the target MSR
may not actually exist. */
static void __rdmsr_safe_on_cpu(void *info)