diff options
| author | Jens Axboe <axboe@kernel.dk> | 2023-06-13 08:34:08 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-09-29 02:37:07 -0600 |
| commit | e9a56c9325ef28d5481712e85dd5d3f8b2a68e88 (patch) | |
| tree | 72752529ff7eab88986e8e48d72ad8a6985dad71 /kernel/futex | |
| parent | 5177c0cb306a8628bafbf1e6b7aa7e1b7436b8dc (diff) | |
futex: make the vectored futex operations available
Rename unqueue_multiple() as futex_unqueue_multiple(), and make both
that and futex_wait_multiple_setup() available for external users. This
is in preparation for wiring up vectored waits in io_uring.
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'kernel/futex')
| -rw-r--r-- | kernel/futex/futex.h | 5 | ||||
| -rw-r--r-- | kernel/futex/waitwake.c | 10 |
2 files changed, 10 insertions, 5 deletions
diff --git a/kernel/futex/futex.h b/kernel/futex/futex.h index 6b6a6b3da103..8b195d06f4e8 100644 --- a/kernel/futex/futex.h +++ b/kernel/futex/futex.h @@ -366,6 +366,11 @@ extern int futex_parse_waitv(struct futex_vector *futexv, unsigned int nr_futexes, futex_wake_fn *wake, void *wake_data); +extern int futex_wait_multiple_setup(struct futex_vector *vs, int count, + int *woken); + +extern int futex_unqueue_multiple(struct futex_vector *v, int count); + extern int futex_wait_multiple(struct futex_vector *vs, unsigned int count, struct hrtimer_sleeper *to); diff --git a/kernel/futex/waitwake.c b/kernel/futex/waitwake.c index 6fcf5f723719..61b112897a84 100644 --- a/kernel/futex/waitwake.c +++ b/kernel/futex/waitwake.c @@ -372,7 +372,7 @@ void futex_wait_queue(struct futex_hash_bucket *hb, struct futex_q *q, } /** - * unqueue_multiple - Remove various futexes from their hash bucket + * futex_unqueue_multiple - Remove various futexes from their hash bucket * @v: The list of futexes to unqueue * @count: Number of futexes in the list * @@ -382,7 +382,7 @@ void futex_wait_queue(struct futex_hash_bucket *hb, struct futex_q *q, * - >=0 - Index of the last futex that was awoken; * - -1 - No futex was awoken */ -static int unqueue_multiple(struct futex_vector *v, int count) +int futex_unqueue_multiple(struct futex_vector *v, int count) { int ret = -1, i; @@ -410,7 +410,7 @@ static int unqueue_multiple(struct futex_vector *v, int count) * - 0 - Success * - <0 - -EFAULT, -EWOULDBLOCK or -EINVAL */ -static int futex_wait_multiple_setup(struct futex_vector *vs, int count, int *woken) +int futex_wait_multiple_setup(struct futex_vector *vs, int count, int *woken) { struct futex_hash_bucket *hb; bool retry = false; @@ -472,7 +472,7 @@ retry: * was woken, we don't return error and return this index to * userspace */ - *woken = unqueue_multiple(vs, i); + *woken = futex_unqueue_multiple(vs, i); if (*woken >= 0) return 1; @@ -557,7 +557,7 @@ int futex_wait_multiple(struct futex_vector *vs, unsigned int count, __set_current_state(TASK_RUNNING); - ret = unqueue_multiple(vs, count); + ret = futex_unqueue_multiple(vs, count); if (ret >= 0) return ret; |