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| author | Anton Staaf <robotboy@chromium.org> | 2015-07-22 09:11:46 -0700 |
|---|---|---|
| committer | ChromeOS Commit Bot <chromeos-commit-bot@chromium.org> | 2015-07-27 19:30:44 +0000 |
| commit | 4626177c3b055fdbab6344065d9b335a40ea1c1e (patch) | |
| tree | a704de5752df739253b0a4b2dcb350075087a1eb /core/cortex-m0/atomic.h | |
| parent | 3e9bd8027c9317dbf12cdd59d735efd47fb3f1f4 (diff) | |
| download | chrome-ec-4626177c3b055fdbab6344065d9b335a40ea1c1e.tar.gz | |
Atomic: Mark the modified uint32_t volatile
The atomic_* functions are often used in contexts where the data they
will operate on are volatile (due to being shared between tasks or a
task and an interrupt handler). Adding volatile here makes using the
atomic_* functions a little easier in those cases and removes a cast
from the call sites (which could be obscuring a bug, if for instance
the variable was modified to be a uint16_t).
Signed-off-by: Anton Staaf <robotboy@chromium.org>
BRANCH=None
BUG=None
TEST=make buildall -j
Change-Id: I71356eb3cf2c0506df38532eee767c7d78f9240e
Reviewed-on: https://chromium-review.googlesource.com/287516
Trybot-Ready: Anton Staaf <robotboy@chromium.org>
Tested-by: Anton Staaf <robotboy@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Commit-Queue: Anton Staaf <robotboy@chromium.org>
Diffstat (limited to 'core/cortex-m0/atomic.h')
| -rw-r--r-- | core/cortex-m0/atomic.h | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/core/cortex-m0/atomic.h b/core/cortex-m0/atomic.h index 62bc2ff370..32260ada07 100644 --- a/core/cortex-m0/atomic.h +++ b/core/cortex-m0/atomic.h @@ -27,27 +27,27 @@ : "b" (a), "r" (v) : "cc"); \ } while (0) -static inline void atomic_clear(uint32_t *addr, uint32_t bits) +static inline void atomic_clear(uint32_t volatile *addr, uint32_t bits) { ATOMIC_OP(bic, addr, bits); } -static inline void atomic_or(uint32_t *addr, uint32_t bits) +static inline void atomic_or(uint32_t volatile *addr, uint32_t bits) { ATOMIC_OP(orr, addr, bits); } -static inline void atomic_add(uint32_t *addr, uint32_t value) +static inline void atomic_add(uint32_t volatile *addr, uint32_t value) { ATOMIC_OP(add, addr, value); } -static inline void atomic_sub(uint32_t *addr, uint32_t value) +static inline void atomic_sub(uint32_t volatile *addr, uint32_t value) { ATOMIC_OP(sub, addr, value); } -static inline uint32_t atomic_read_clear(uint32_t *addr) +static inline uint32_t atomic_read_clear(uint32_t volatile *addr) { uint32_t ret; |