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io_uring: add abstraction around apoll cache

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In preparation for adding limits, and one more user, abstract out the
core bits of the allocation+free cache.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe
2022-07-07 14:16:20 -06:00
parent 9da7471ed1
commit 9b797a37c4
5 changed files with 62 additions and 20 deletions
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9
io_uring/poll.h
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@@ -1,5 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
#include "alloc_cache.h"
enum {
IO_APOLL_OK,
IO_APOLL_ABORTED,
@@ -14,7 +16,10 @@ struct io_poll {
};
struct async_poll {
struct io_poll poll;
union {
struct io_poll poll;
struct io_cache_entry cache;
};
struct io_poll *double_poll;
};
@@ -31,4 +36,4 @@ int io_arm_poll_handler(struct io_kiocb *req, unsigned issue_flags);
bool io_poll_remove_all(struct io_ring_ctx *ctx, struct task_struct *tsk,
bool cancel_all);
void io_flush_apoll_cache(struct io_ring_ctx *ctx);
void io_apoll_cache_free(struct io_cache_entry *entry);