Fixes commit d0a8d9378d16 ("x86/paravirt: Make native_save_fl() extern inline").

It was reported that the above commit was 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.

Cc: stable@vger.kernel.org # 4.17, 4.14, 4.9, 4.4 Reported-by: David Laight david.laight@aculab.com Reported-by: Jean Delvare jdelvare@suse.de Signed-off-by: Nick Desaulniers ndesaulniers@google.com --- arch/x86/include/asm/irqflags.h | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/arch/x86/include/asm/irqflags.h b/arch/x86/include/asm/irqflags.h index c4fc17220df9..c14f2a74b2be 100644 --- 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;