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| author | Masami Hiramatsu <mhiramat@redhat.com> | 2009-03-09 12:40:40 -0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-03-10 16:24:23 +0100 |
| commit | 7cf49427042400d40bdc80b5c3399b6b5945afa8 (patch) | |
| tree | a9466accbbe3e8dfea5a7206d735d5281ae0f257 /arch/x86 | |
| parent | 12e87e36e0141c08dbc8b2177c93c75fb18ad7e5 (diff) | |
| download | blackbird-op-linux-7cf49427042400d40bdc80b5c3399b6b5945afa8.tar.gz blackbird-op-linux-7cf49427042400d40bdc80b5c3399b6b5945afa8.zip | |
x86: expand irq-off region in text_poke()
Expand irq-off region to cover fixmap using code and cache synchronizing.
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
LKML-Reference: <49B54688.8090403@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/alternative.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c index 2d903b760ddb..f57658702571 100644 --- a/arch/x86/kernel/alternative.c +++ b/arch/x86/kernel/alternative.c @@ -526,13 +526,12 @@ void *__kprobes text_poke(void *addr, const void *opcode, size_t len) pages[1] = virt_to_page(addr + PAGE_SIZE); } BUG_ON(!pages[0]); + local_irq_save(flags); set_fixmap(FIX_TEXT_POKE0, page_to_phys(pages[0])); if (pages[1]) set_fixmap(FIX_TEXT_POKE1, page_to_phys(pages[1])); vaddr = (char *)fix_to_virt(FIX_TEXT_POKE0); - local_irq_save(flags); memcpy(&vaddr[(unsigned long)addr & ~PAGE_MASK], opcode, len); - local_irq_restore(flags); clear_fixmap(FIX_TEXT_POKE0); if (pages[1]) clear_fixmap(FIX_TEXT_POKE1); @@ -542,5 +541,6 @@ void *__kprobes text_poke(void *addr, const void *opcode, size_t len) that causes hangs on some VIA CPUs. */ for (i = 0; i < len; i++) BUG_ON(((char *)addr)[i] != ((char *)opcode)[i]); + local_irq_restore(flags); return addr; } |
