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| author | Richard Kuo <rkuo@codeaurora.org> | 2013-11-25 13:49:26 -0600 |
|---|---|---|
| committer | Richard Kuo <rkuo@codeaurora.org> | 2014-04-04 18:20:02 -0500 |
| commit | b10fa7b62d4201602dac45290b43defd4a980a12 (patch) | |
| tree | 4a8f1acc0d5ac4f4f41e54b0f29230abd781f654 /arch/hexagon | |
| parent | 17ca896dae8272a3dadf6343dca9daa5c2e6ebb5 (diff) | |
| download | lwn-b10fa7b62d4201602dac45290b43defd4a980a12.tar.gz lwn-b10fa7b62d4201602dac45290b43defd4a980a12.zip | |
Hexagon: fix atomic_set
Normal writes in our our architecture don't invalidate lock
reservations.
Signed-off-by: Richard Kuo <rkuo@codeaurora.org>
Diffstat (limited to 'arch/hexagon')
| -rw-r--r-- | arch/hexagon/include/asm/atomic.h | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/arch/hexagon/include/asm/atomic.h b/arch/hexagon/include/asm/atomic.h index 7aae4cb2a29a..17dc63780c06 100644 --- a/arch/hexagon/include/asm/atomic.h +++ b/arch/hexagon/include/asm/atomic.h @@ -26,7 +26,20 @@ #include <asm/cmpxchg.h> #define ATOMIC_INIT(i) { (i) } -#define atomic_set(v, i) ((v)->counter = (i)) + +/* Normal writes in our arch don't clear lock reservations */ + +static inline void atomic_set(atomic_t *v, int new) +{ + asm volatile( + "1: r6 = memw_locked(%0);\n" + " memw_locked(%0,p0) = %1;\n" + " if (!P0) jump 1b;\n" + : + : "r" (&v->counter), "r" (new) + : "memory", "p0", "r6" + ); +} /** * atomic_read - reads a word, atomically |