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| author | Masami Hiramatsu <mhiramat@redhat.com> | 2009-03-06 16:37:54 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-03-06 16:49:01 +0100 |
| commit | 78ff7fae04554b49d29226ed12536268c2500d1f (patch) | |
| tree | 377980e0543a7c9d0f6567498a186284ae85e432 /arch/x86/include/asm/fixmap.h | |
| parent | tracing, Text Edit Lock - SMP alternatives support (diff) | |
| download | linux-78ff7fae04554b49d29226ed12536268c2500d1f.tar.xz linux-78ff7fae04554b49d29226ed12536268c2500d1f.zip | |
x86: implement atomic text_poke() via fixmap
Use fixmaps instead of vmap/vunmap in text_poke() for avoiding
page allocation and delayed unmapping.
At the result of above change, text_poke() becomes atomic and can be called
from stop_machine() etc.
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
LKML-Reference: <49B14352.2040705@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/include/asm/fixmap.h')
| -rw-r--r-- | arch/x86/include/asm/fixmap.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/include/asm/fixmap.h b/arch/x86/include/asm/fixmap.h index 63a79c77d220..81937a5dc77c 100644 --- a/arch/x86/include/asm/fixmap.h +++ b/arch/x86/include/asm/fixmap.h @@ -111,6 +111,8 @@ enum fixed_addresses { #ifdef CONFIG_PARAVIRT FIX_PARAVIRT_BOOTMAP, #endif + FIX_TEXT_POKE0, /* reserve 2 pages for text_poke() */ + FIX_TEXT_POKE1, __end_of_permanent_fixed_addresses, #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT FIX_OHCI1394_BASE, |