summaryrefslogtreecommitdiffstats
path: root/arch/x86
diff options
context:
space:
mode:
authorStephen Wilson <wilsons@start.ca>2011-03-13 15:49:13 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2011-03-23 16:36:52 -0400
commitc2ef45df3b98a027ec8f9081bd2a19dff520ef9d (patch)
tree1df9ccca6a81471d20569e6c3196e32466a2a3fd /arch/x86
parent2fadaef41283aad7100fa73f01998cddaca25833 (diff)
downloadop-kernel-dev-c2ef45df3b98a027ec8f9081bd2a19dff520ef9d.zip
op-kernel-dev-c2ef45df3b98a027ec8f9081bd2a19dff520ef9d.tar.gz
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>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/include/asm/mmu.h6
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..aeff3e8 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
OpenPOWER on IntegriCloud