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Two minor issues:

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(1) Don't define load/store 64 atomics for o32. They aren't atomic
there.
(2) Add comment about why we need 64 atomic define on n32 only.
This commit is contained in:
Warner Losh 2019-12-17 03:20:37 +00:00
parent 185c3d2b93
commit fa9b4635f0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=355841
1 changed files with 7 additions and 1 deletions
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8
sys/mips/include/atomic.h
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@ -345,10 +345,16 @@ atomic_store_rel_##WIDTH(__volatile uint##WIDTH##_t *p, uint##WIDTH##_t v)\
}
ATOMIC_STORE_LOAD(32)
#if defined(__mips_n64) || defined(__mips_n32)
ATOMIC_STORE_LOAD(64)
#endif
#undef ATOMIC_STORE_LOAD
#ifdef __mips_n32
/*
* MIPS n32 is not a LP64 API, so atomic_load_64 isn't defined there. Define it
* here since n32 is an oddball !LP64 but that can do 64-bit atomics.
*/
#if defined(__mips_n32)
#define atomic_load_64 atomic_load_acq_64
#endif