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Date: Fri, 16 Dec 2016 11:56:31 +0100 From: Arnd Bergmann <arnd@...db.de> To: linux-arch@...r.kernel.org Cc: linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org, linux-arm-kernel@...r.kernel.org, Russell King <rmk+kernel@...linux.org.uk>, Andrew Morton <akpm@...ux-foundation.org>, kernel-build-reports@...ts.linaro.org, kvmarm@...ts.cs.columbia.edu, Arnd Bergmann <arnd@...db.de> Subject: [PATCH 10/13] asm-generic: mark cmpxchg as __always_inline for gcc-4.3 With CONFIG_OPTIMIZE_INLINING and older compilers, we can get a link error such as kernel/task_work.o: In function `__cmpxchg_local_generic': task_work.c:(.text+0x14c): undefined reference to `wrong_size_cmpxchg' kernel/locking/rtmutex.o: In function `__cmpxchg_local_generic': rtmutex.c:(.text+0x5ec): undefined reference to `wrong_size_cmpxchg' kernel/trace/ring_buffer.o: In function `__cmpxchg_local_generic': Marking the functions in question as __always_inline avoids that possibility. Signed-off-by: Arnd Bergmann <arnd@...db.de> --- include/asm-generic/cmpxchg-local.h | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/include/asm-generic/cmpxchg-local.h b/include/asm-generic/cmpxchg-local.h index 70bef78912b7..e82d7032b1b8 100644 --- a/include/asm-generic/cmpxchg-local.h +++ b/include/asm-generic/cmpxchg-local.h @@ -11,7 +11,8 @@ extern unsigned long wrong_size_cmpxchg(volatile void *ptr) * Generic version of __cmpxchg_local (disables interrupts). Takes an unsigned * long parameter, supporting various types of architectures. */ -static inline unsigned long __cmpxchg_local_generic(volatile void *ptr, +static __always_inline unsigned long +__cmpxchg_local_generic(volatile void *ptr, unsigned long old, unsigned long new, int size) { unsigned long flags, prev; @@ -50,8 +51,8 @@ static inline unsigned long __cmpxchg_local_generic(volatile void *ptr, /* * Generic version of __cmpxchg64_local. Takes an u64 parameter. */ -static inline u64 __cmpxchg64_local_generic(volatile void *ptr, - u64 old, u64 new) +static __always_inline u64 +__cmpxchg64_local_generic(volatile void *ptr, u64 old, u64 new) { u64 prev; unsigned long flags; -- 2.9.0
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