x86/entry: Mark check_user_regs() noinstr

KAGA-KOKO · KAGA-KOKO · commit 006e1ced516d · 2020-07-09T11:18:29.000+02:00
It's called from the non-instrumentable section. Fixes: c9c2615 ("x86/entry: Assert that syscalls are on the right stack") Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Andy Lutomirski <luto@kernel.org> Link: https://lkml.kernel.org/r/20200708192934.191497962@linutronix.de
diff --git 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)) {
 		/*

Original file line number	Diff line number	Diff line change
`@@ -46,7 +46,7 @@`
`46`	`46`	`#include <trace/events/syscalls.h>`
`47`	`47`
`48`	`48`	`/* Check that the stack and regs on entry from user mode are sane. */`
`49`		`-static void check_user_regs(struct pt_regs *regs)`
	`49`	`+static noinstr void check_user_regs(struct pt_regs *regs)`
`50`	`50`	`{`
`51`	`51`	`if (IS_ENABLED(CONFIG_DEBUG_ENTRY)) {`
`52`	`52`	`/*`