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Hexagon: fix atomic_set 

Normal writes in our our architecture don't invalidate lock
reservations.

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>
hifive-unleashed-5.1
Richard Kuo 2013-11-25 13:49:26 -06:00
parent 17ca896dae
commit b10fa7b62d
1 changed files with 14 additions and 1 deletions
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15
arch/hexagon/include/asm/atomic.h
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@ -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