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| author | Ingo Molnar <mingo@elte.hu> | 2011-01-05 14:22:08 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-01-05 14:22:10 +0100 |
| commit | aef1b9cef78ae65c6501850851cc3f61f9be477b (patch) | |
| tree | 9769972983e84620df17c13b73f70a8341c4b125 /arch/x86/oprofile/op_model_amd.c | |
| parent | 20c457b8587bee4644d998331d9e13be82e05b4c (diff) | |
| parent | 3c0eee3fe6a3a1c745379547c7e7c904aa64f6d5 (diff) | |
| download | linux-aef1b9cef78ae65c6501850851cc3f61f9be477b.tar.bz2 | |
Merge commit 'v2.6.37' into perf/core
Merge reason: Add the final .37 tree.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/oprofile/op_model_amd.c')
| -rw-r--r-- | arch/x86/oprofile/op_model_amd.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/arch/x86/oprofile/op_model_amd.c b/arch/x86/oprofile/op_model_amd.c index f2984d43a6b3..51104b33fd51 100644 --- a/arch/x86/oprofile/op_model_amd.c +++ b/arch/x86/oprofile/op_model_amd.c @@ -637,21 +637,29 @@ static int __init_ibs_nmi(void) return 0; } -/* initialize the APIC for the IBS interrupts if available */ +/* + * check and reserve APIC extended interrupt LVT offset for IBS if + * available + * + * init_ibs() preforms implicitly cpu-local operations, so pin this + * thread to its current CPU + */ + static void init_ibs(void) { - ibs_caps = get_ibs_caps(); + preempt_disable(); + ibs_caps = get_ibs_caps(); if (!ibs_caps) - return; + goto out; - if (__init_ibs_nmi()) { + if (__init_ibs_nmi() < 0) ibs_caps = 0; - return; - } + else + printk(KERN_INFO "oprofile: AMD IBS detected (0x%08x)\n", ibs_caps); - printk(KERN_INFO "oprofile: AMD IBS detected (0x%08x)\n", - (unsigned)ibs_caps); +out: + preempt_enable(); } static int (*create_arch_files)(struct super_block *sb, struct dentry *root); |