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@xxxxxxxxxxxxxxx # 4.17, 4.14, 4.9, 4.4
Reported-by: David Laight <david.laight@xxxxxxxxxx>
Reported-by: Jean Delvare <jdelvare@xxxxxxx>
Signed-off-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
---
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;
--
2.18.0.597.ga71716f1ad-goog
