Commit cf3a13d7 authored Jul 01, 2013 by Chen Gang Committed by Chris Metcalf Jul 17, 2013

arch: tile: include: asm: add cmpxchg64() definition

Need add cmpxchg64(), or will cause compiling issue.

Need define it as cmpxchg() only for 64-bit operation, since cmpxchg()
can support 8 bytes.

The related error (with allmodconfig):

drivers/block/blockconsole.c: In function ‘bcon_advance_console_bytes’:
drivers/block/blockconsole.c:164:2: error: implicit declaration of function ‘cmpxchg64’ [-Werror=implicit-function-declaration]

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>

parent ad81f054

arch/tile/include/asm/cmpxchg.h

+6 −0

Original line number	Diff line number	Diff line
		@@ -68,6 +68,12 @@ extern unsigned long __cmpxchg_called_with_bad_pointer(void);

		#define tas(ptr) (xchg((ptr), 1))

		#define cmpxchg64(ptr, o, n) \
		({ \
		BUILD_BUG_ON(sizeof(*(ptr)) != 8); \
		cmpxchg((ptr), (o), (n)); \
		})

		#endif /* __ASSEMBLY__ */

		#endif /* _ASM_TILE_CMPXCHG_H */

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