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authorLinus Torvalds <torvalds@linux-foundation.org>2009-03-03 14:32:55 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-03-03 14:32:55 -0800
commit3024e4a99744f5b59704a6570524a312f94f010f (patch)
tree52739d6ef2af3afe3dc7b0f7ee942fd43da107c1
parentf2a4165526a9746afc4ba5413b1756614a49d450 (diff)
parent780eef9492b16a1543a3b2ae9f9526a735fc9856 (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: oprofile: don't set counter width from cpuid on Core2 x86: fix init_memory_mapping() to handle small ranges
-rw-r--r--arch/x86/mm/init_64.c2
-rw-r--r--arch/x86/oprofile/op_model_ppro.c14
2 files changed, 14 insertions, 2 deletions
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index e6d36b490250..b1352250096e 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -714,6 +714,8 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
pos = start_pfn << PAGE_SHIFT;
end_pfn = ((pos + (PMD_SIZE - 1)) >> PMD_SHIFT)
<< (PMD_SHIFT - PAGE_SHIFT);
+ if (end_pfn > (end >> PAGE_SHIFT))
+ end_pfn = end >> PAGE_SHIFT;
if (start_pfn < end_pfn) {
nr_range = save_mr(mr, nr_range, start_pfn, end_pfn, 0);
pos = end_pfn << PAGE_SHIFT;
diff --git a/arch/x86/oprofile/op_model_ppro.c b/arch/x86/oprofile/op_model_ppro.c
index e9f80c744cf3..10131fbdaada 100644
--- a/arch/x86/oprofile/op_model_ppro.c
+++ b/arch/x86/oprofile/op_model_ppro.c
@@ -78,8 +78,18 @@ static void ppro_setup_ctrs(struct op_msrs const * const msrs)
if (cpu_has_arch_perfmon) {
union cpuid10_eax eax;
eax.full = cpuid_eax(0xa);
- if (counter_width < eax.split.bit_width)
- counter_width = eax.split.bit_width;
+
+ /*
+ * For Core2 (family 6, model 15), don't reset the
+ * counter width:
+ */
+ if (!(eax.split.version_id == 0 &&
+ current_cpu_data.x86 == 6 &&
+ current_cpu_data.x86_model == 15)) {
+
+ if (counter_width < eax.split.bit_width)
+ counter_width = eax.split.bit_width;
+ }
}
/* clear all counters */