4.17-stable review patch. If anyone has any objections, please let me know.
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From: Nick Desaulniers ndesaulniers@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.laight@aculab.com Reported-by: Jean Delvare jdelvare@suse.de Signed-off-by: Nick Desaulniers ndesaulniers@google.com Signed-off-by: Thomas Gleixner tglx@linutronix.de Cc: hpa@zytor.com Cc: jgross@suse.com Cc: kstewart@linuxfoundation.org Cc: gregkh@linuxfoundation.org Cc: boris.ostrovsky@oracle.com Cc: astrachan@google.com Cc: mka@chromium.org Cc: arnd@arndb.de Cc: tstellar@redhat.com Cc: sedat.dilek@gmail.com Cc: David.Laight@aculab.com Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20180803170550.164688-1-ndesaulniers@google.com Signed-off-by: Greg Kroah-Hartman gregkh@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;