Emphasize that return value of io_flush_cached_reqs() depends on number
of requests in the cache. It looks nicer and might help tools from
false-negative analyses.
Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
---
fs/io_uring.c | 16 ++++++++++------
1 file changed, 10 insertions(+), 6 deletions(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index c29f96e3111d..e4c92498a0af 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -1647,11 +1647,12 @@ static void io_req_complete_failed(struct io_kiocb *req, long res)
io_req_complete_post(req, res, 0);
}
+/* Returns true IFF there are requests in the cache */
static bool io_flush_cached_reqs(struct io_ring_ctx *ctx)
{
struct io_submit_state *state = &ctx->submit_state;
struct io_comp_state *cs = &state->comp;
- struct io_kiocb *req = NULL;
+ int nr;
/*
* If we have more than a batch's worth of requests in our IRQ side
@@ -1665,16 +1666,19 @@ static bool io_flush_cached_reqs(struct io_ring_ctx *ctx)
spin_unlock_irq(&ctx->completion_lock);
}
+ nr = state->free_reqs;
while (!list_empty(&cs->free_list)) {
- req = list_first_entry(&cs->free_list, struct io_kiocb,
- compl.list);
+ struct io_kiocb *req = list_first_entry(&cs->free_list,
+ struct io_kiocb, compl.list);
+
list_del(&req->compl.list);
- state->reqs[state->free_reqs++] = req;
- if (state->free_reqs == ARRAY_SIZE(state->reqs))
+ state->reqs[nr++] = req;
+ if (nr == ARRAY_SIZE(state->reqs))
break;
}
- return req != NULL;
+ state->free_reqs = nr;
+ return nr != 0;
}
static struct io_kiocb *io_alloc_req(struct io_ring_ctx *ctx)
--
2.24.0
