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| author | Stephen Wilson <wilsons@start.ca> | 2011-03-13 15:49:13 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2011-03-23 16:36:52 -0400 |
| commit | c2ef45df3b98a027ec8f9081bd2a19dff520ef9d (patch) | |
| tree | 1df9ccca6a81471d20569e6c3196e32466a2a3fd | |
| parent | 2fadaef41283aad7100fa73f01998cddaca25833 (diff) | |
| download | linux-c2ef45df3b98a027ec8f9081bd2a19dff520ef9d.tar.gz linux-c2ef45df3b98a027ec8f9081bd2a19dff520ef9d.tar.bz2 linux-c2ef45df3b98a027ec8f9081bd2a19dff520ef9d.zip | |
x86: add context tag to mark mm when running a task in 32-bit compatibility mode
This tag is intended to mirror the thread info TIF_IA32 flag. Will be used to
identify mm's which support 32 bit tasks running in compatibility mode without
requiring a reference to the task itself.
Signed-off-by: Stephen Wilson <wilsons@start.ca>
Reviewed-by: Michel Lespinasse <walken@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | arch/x86/include/asm/mmu.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/include/asm/mmu.h b/arch/x86/include/asm/mmu.h index 80a1dee5bea5..aeff3e89b222 100644 --- a/arch/x86/include/asm/mmu.h +++ b/arch/x86/include/asm/mmu.h @@ -13,6 +13,12 @@ typedef struct { int size; struct mutex lock; void *vdso; + +#ifdef CONFIG_X86_64 + /* True if mm supports a task running in 32 bit compatibility mode. */ + unsigned short ia32_compat; +#endif + } mm_context_t; #ifdef CONFIG_SMP |