4.17-stable review patch. If anyone has any objections, please let me know.
------------------
From: Nick Desaulniers <ndesaulni...@google.com>
commit 208cbb32558907f68b3b2a081ca2337ac3744794 upstream.
It was reported that the commit d0a8d9378d16 is causing users of gcc < 4.9
to observe -Werror=missing-prototypes errors.
Indeed, it seems that:
extern inline unsigned long native_save_fl(void) { return 0; }
compiled with -Werror=missing-prototypes produces this warning in gcc <
4.9, but not gcc >= 4.9.
Fixes: d0a8d9378d16 ("x86/paravirt: Make native_save_fl() extern inline").
Reported-by: David Laight <david.lai...@aculab.com>
Reported-by: Jean Delvare <jdelv...@suse.de>
Signed-off-by: Nick Desaulniers <ndesaulni...@google.com>
Signed-off-by: Thomas Gleixner <t...@linutronix.de>
Cc: h...@zytor.com
Cc: jgr...@suse.com
Cc: kstew...@linuxfoundation.org
Cc: gre...@linuxfoundation.org
Cc: boris.ostrov...@oracle.com
Cc: astrac...@google.com
Cc: m...@chromium.org
Cc: a...@arndb.de
Cc: tstel...@redhat.com
Cc: sedat.di...@gmail.com
Cc: david.lai...@aculab.com
Cc: sta...@vger.kernel.org
Link: https://lkml.kernel.org/r/20180803170550.164688-1-ndesaulni...@google.com
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
arch/x86/include/asm/irqflags.h | 2 ++
1 file changed, 2 insertions(+)
--- a/arch/x86/include/asm/irqflags.h
+++ b/arch/x86/include/asm/irqflags.h
@@ -13,6 +13,8 @@
* Interrupt control:
*/
+/* Declaration required for gcc < 4.9 to prevent -Werror=missing-prototypes */
+extern inline unsigned long native_save_fl(void);
extern inline unsigned long native_save_fl(void)
{
unsigned long flags;
