linux-kernel - [PATCH 4/4] x86/oprofile: down with test_thread_flag(TIF

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Message-ID: <1460657414-12530-5-git-send-email-dsafonov@virtuozzo.com>
Date:	Thu, 14 Apr 2016 21:10:14 +0300
From:	Dmitry Safonov <dsafonov@...tuozzo.com>
To:	<linux-kernel@...r.kernel.org>
CC:	<luto@...capital.net>, <tglx@...utronix.de>, <mingo@...hat.com>,
	<hpa@...or.com>, <x86@...nel.org>, <rric@...nel.org>,
	<oprofile-list@...ts.sf.net>, <0x7f454c46@...il.com>,
	Dmitry Safonov <dsafonov@...tuozzo.com>
Subject: [PATCH 4/4] x86/oprofile: down with test_thread_flag(TIF_IA32)

As we have here full register set - just use user_64bit_mode
on it.

Signed-off-by: Dmitry Safonov <dsafonov@...tuozzo.com>
---
 arch/x86/oprofile/backtrace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/oprofile/backtrace.c b/arch/x86/oprofile/backtrace.c
index cb31a4440e58..405dadaee74a 100644
--- a/arch/x86/oprofile/backtrace.c
+++ b/arch/x86/oprofile/backtrace.c
@@ -69,7 +69,7 @@ x86_backtrace_32(struct pt_regs * const regs, unsigned int depth)
 	struct stack_frame_ia32 *head;
 
 	/* User process is IA32 */
-	if (!current || !test_thread_flag(TIF_IA32))
+	if (!current || user_64bit_mode(regs))
 		return 0;
 
 	head = (struct stack_frame_ia32 *) regs->bp;
-- 
2.8.0