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Revert "io_uring/sqpoll: close race on waiting for sqring entries"

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This reverts commit a00eccba07.
This commit is contained in:
Ksawlii 2024-11-24 00:22:52 +01:00
parent 9bf31e8691
commit 05db595c67
1 changed files with 1 additions and 8 deletions
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9
io_uring/io_uring.c
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@ -1607,14 +1607,7 @@ static inline bool io_sqring_full(struct io_ring_ctx *ctx)
{
struct io_rings *r = ctx->rings;
/*
* SQPOLL must use the actual sqring head, as using the cached_sq_head
* is race prone if the SQPOLL thread has grabbed entries but not yet
* committed them to the ring. For !SQPOLL, this doesn't matter, but
* since this helper is just used for SQPOLL sqring waits (or POLLOUT),
* just read the actual sqring head unconditionally.
*/
return READ_ONCE(r->sq.tail) - READ_ONCE(r->sq.head) == ctx->sq_entries;
return READ_ONCE(r->sq.tail) - ctx->cached_sq_head == ctx->sq_entries;
}
static inline unsigned int __io_cqring_events(struct io_ring_ctx *ctx)