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x86: add context tag to mark mm when running a task in 32-bit compatibility mode

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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>
This commit is contained in:
Stephen Wilson 2011-03-13 15:49:13 -04:00 committed by Al Viro
parent 2fadaef412
commit c2ef45df3b
1 changed files with 6 additions and 0 deletions
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6
arch/x86/include/asm/mmu.h
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@ -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