[PATCH 1/5] x86: add context tag to mark mm when running a task in 32-bit compatibility mode

Stephen Wilson
2011-03-09T00:31:57Z

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>
---
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 80a1dee..8a2e5b4 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 compat;
+#endif
+
} mm_context_t;

#ifdef CONFIG_SMP
--
1.7.3.5