[PATCH] x86_64: Implement is_compat_task the right way
By setting a flag during a 32bit system call only
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/x86_64/kernel/asm-offsets.c b/arch/x86_64/kernel/asm-offsets.c
index 00a08d1..cfb4f9c 100644
--- a/arch/x86_64/kernel/asm-offsets.c
+++ b/arch/x86_64/kernel/asm-offsets.c
@@ -33,6 +33,7 @@
ENTRY(flags);
ENTRY(addr_limit);
ENTRY(preempt_count);
+ ENTRY(status);
BLANK();
#undef ENTRY
#define ENTRY(entry) DEFINE(pda_ ## entry, offsetof(struct x8664_pda, entry))
diff --git a/arch/x86_64/kernel/entry.S b/arch/x86_64/kernel/entry.S
index 45e0ab8..300555b 100644
--- a/arch/x86_64/kernel/entry.S
+++ b/arch/x86_64/kernel/entry.S
@@ -313,6 +313,7 @@
movl threadinfo_flags(%rcx),%edx
andl %edi,%edx
jnz int_careful
+ andl $~TS_COMPAT,threadinfo_status(%rcx)
jmp retint_swapgs
/* Either reschedule or signal or syscall exit tracking needed. */