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| author | H. Peter Anvin <hpa@linux.intel.com> | 2011-04-19 00:19:51 +0200 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2011-04-19 01:40:21 +0200 |
| commit | dc326fca2b640fc41aed7c015d0f456935a66255 (patch) | |
| tree | 9181ef9c416e8fba822d75b53155c896b3900e72 /arch/x86/kernel/jump_label.c | |
| parent | x86, percpu: Use ASM_NOP4 instead of hardcoding P6_NOP4 (diff) | |
| download | linux-dc326fca2b640fc41aed7c015d0f456935a66255.tar.xz linux-dc326fca2b640fc41aed7c015d0f456935a66255.zip | |
x86, cpu: Clean up and unify the NOP selection infrastructure
Clean up and unify the NOP selection infrastructure:
- Make the atomic 5-byte NOP a part of the selection system.
- Pick NOPs once during early boot and then be done with it.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Link: http://lkml.kernel.org/r/1303166160-10315-3-git-send-email-hpa@linux.intel.com
Diffstat (limited to 'arch/x86/kernel/jump_label.c')
| -rw-r--r-- | arch/x86/kernel/jump_label.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/kernel/jump_label.c b/arch/x86/kernel/jump_label.c index 961b6b30ba90..3fee346ef545 100644 --- a/arch/x86/kernel/jump_label.c +++ b/arch/x86/kernel/jump_label.c @@ -34,7 +34,7 @@ void arch_jump_label_transform(struct jump_entry *entry, code.offset = entry->target - (entry->code + JUMP_LABEL_NOP_SIZE); } else - memcpy(&code, ideal_nop5, JUMP_LABEL_NOP_SIZE); + memcpy(&code, ideal_nops[NOP_ATOMIC5], JUMP_LABEL_NOP_SIZE); get_online_cpus(); mutex_lock(&text_mutex); text_poke_smp((void *)entry->code, &code, JUMP_LABEL_NOP_SIZE); @@ -44,7 +44,8 @@ void arch_jump_label_transform(struct jump_entry *entry, void arch_jump_label_text_poke_early(jump_label_t addr) { - text_poke_early((void *)addr, ideal_nop5, JUMP_LABEL_NOP_SIZE); + text_poke_early((void *)addr, ideal_nops[NOP_ATOMIC5], + JUMP_LABEL_NOP_SIZE); } #endif |