[tip:x86/urgent] x86, compat: Use test_thread_flag(TIF_IA32) in compat signal delivery

[tip-bot for Suresh Siddha]

Commit-ID:  0b91f45b23cb73ce11acdc3cf4c6efd4441e3b3e
Gitweb:     http://git.kernel.org/tip/0b91f45b23cb73ce11acdc3cf4c6efd4441e3b3e
Author:     Suresh Siddha <suresh.b.siddha@xxxxxxxxx>
AuthorDate: Thu, 14 Jun 2012 18:07:15 -0700
Committer:  H. Peter Anvin <hpa@xxxxxxxxx>
CommitDate: Thu, 14 Jun 2012 18:16:04 -0700

x86, compat: Use test_thread_flag(TIF_IA32) in compat signal delivery

Signal delivery compat path may not have the 'TS_COMPAT' flag (that
flag indicates how we entered the kernel).  So use
test_thread_flag(TIF_IA32) instead of is_ia32_task(): one of the
functions of TIF_IA32 is just what kind of signal frame we want.

Signed-off-by: Suresh Siddha <suresh.b.siddha@xxxxxxxxx>
Link: http://lkml.kernel.org/r/1339722435.3475.57.camel@xxxxxxxxxxxxxxxxxxxxxxxxxx
Cc: stable@xxxxxxxxxx	# v3.4
Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxx>
---
 arch/x86/ia32/ia32_signal.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/ia32/ia32_signal.c b/arch/x86/ia32/ia32_signal.c
index daeca56..673ac9b 100644
--- a/arch/x86/ia32/ia32_signal.c
+++ b/arch/x86/ia32/ia32_signal.c
@@ -38,7 +38,7 @@
 int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
 {
 	int err = 0;
-	bool ia32 = is_ia32_task();
+	bool ia32 = test_thread_flag(TIF_IA32);
 
 	if (!access_ok(VERIFY_WRITE, to, sizeof(compat_siginfo_t)))
 		return -EFAULT;
--
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