[tip: x86/urgent] x86/entry: Mark check_user_regs() noinstr

[tip-bot2 for Thomas Gleixner]

The following commit has been merged into the x86/urgent branch of tip:

Commit-ID:     006e1ced516d2bfd9db63a32b5dba3c2abf43b04
Gitweb:        https://git.kernel.org/tip/006e1ced516d2bfd9db63a32b5dba3c2abf43b04
Author:        Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate:    Wed, 08 Jul 2020 21:28:06 +02:00
Committer:     Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Thu, 09 Jul 2020 11:18:29 +02:00

x86/entry: Mark check_user_regs() noinstr

It's called from the non-instrumentable section.

Fixes: c9c26150e61d ("x86/entry: Assert that syscalls are on the right stack")
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Acked-by: Andy Lutomirski <luto@xxxxxxxxxx>
Link: https://lkml.kernel.org/r/20200708192934.191497962@xxxxxxxxxxxxx

---
 arch/x86/entry/common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c
index e83b3f1..ea7b515 100644
--- a/arch/x86/entry/common.c
+++ b/arch/x86/entry/common.c
@@ -46,7 +46,7 @@
 #include <trace/events/syscalls.h>
 
 /* Check that the stack and regs on entry from user mode are sane. */
-static void check_user_regs(struct pt_regs *regs)
+static noinstr void check_user_regs(struct pt_regs *regs)
 {
 	if (IS_ENABLED(CONFIG_DEBUG_ENTRY)) {
 		/*