linux/arch/x86/include/asm/mmu.h
Stephen Wilson c2ef45df3b 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>
2011-03-23 16:36:52 -04:00

33 lines
537 B
C

#ifndef _ASM_X86_MMU_H
#define _ASM_X86_MMU_H
#include <linux/spinlock.h>
#include <linux/mutex.h>
/*
* The x86 doesn't have a mmu context, but
* we put the segment information here.
*/
typedef struct {
void *ldt;
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
void leave_mm(int cpu);
#else
static inline void leave_mm(int cpu)
{
}
#endif
#endif /* _ASM_X86_MMU_H */