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@arndb.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;