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| author |   Peter Zijlstra (Intel) <peterz@infradead.org> | 2025-03-14 10:26:55 -0700 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2025-03-17 11:23:36 +0100 |
| commit | fdfda868ee3b5da1fbdb7710b731e09d8dd3a615 (patch) | |
| tree | e7c5ae3f76196791b45f67bc9091ac71fcb9bd4a | |
| parent | perf: Save PMU specific data in task_struct (diff) | |
| download | wireguard-linux-fdfda868ee3b5da1fbdb7710b731e09d8dd3a615.tar.xz wireguard-linux-fdfda868ee3b5da1fbdb7710b731e09d8dd3a615.zip | |
locking/percpu-rwsem: Add guard support
To simplify the usage of the percpu rw semaphore.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250314172700.438923-2-kan.liang@linux.intel.com
Diffstat (limited to '')
| -rw-r--r-- | include/linux/percpu-rwsem.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/percpu-rwsem.h b/include/linux/percpu-rwsem.h index c012df33a9f0..af7d75ede619 100644 --- a/include/linux/percpu-rwsem.h +++ b/include/linux/percpu-rwsem.h @@ -8,6 +8,7 @@ #include <linux/wait.h> #include <linux/rcu_sync.h> #include <linux/lockdep.h> +#include <linux/cleanup.h> struct percpu_rw_semaphore { struct rcu_sync rss; @@ -125,6 +126,13 @@ extern bool percpu_is_read_locked(struct percpu_rw_semaphore *); extern void percpu_down_write(struct percpu_rw_semaphore *); extern void percpu_up_write(struct percpu_rw_semaphore *); +DEFINE_GUARD(percpu_read, struct percpu_rw_semaphore *, + percpu_down_read(_T), percpu_up_read(_T)) +DEFINE_GUARD_COND(percpu_read, _try, percpu_down_read_trylock(_T)) + +DEFINE_GUARD(percpu_write, struct percpu_rw_semaphore *, + percpu_down_write(_T), percpu_up_write(_T)) + static inline bool percpu_is_write_locked(struct percpu_rw_semaphore *sem) { return atomic_read(&sem->block); |