This bug was introduced in commit 950e79dd7313 ("io_uring: minor
io_cqring_wait() optimization"), which was made in preparation for
adc8682ec690 ("io_uring: Add support for napi_busy_poll"). The latter
got reverted in cb3182167325 ("Revert "io_uring: Add support for
napi_busy_poll""), so simply undo the former as well.
Fixes: 950e79dd7313 ("io_uring: minor io_cqring_wait() optimization")
Signed-off-by: Alexey Izbyshev <izbyshev@xxxxxxxxx>
---
io_uring/io_uring.c | 26 +++++++++++++-------------
1 file changed, 13 insertions(+), 13 deletions(-)
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
index cd9a137ad6ce..b764a18f3a49 100644
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -2595,19 +2595,6 @@ static int io_cqring_wait(struct io_ring_ctx *ctx, int min_events,
if (__io_cqring_events_user(ctx) >= min_events)
return 0;
- if (sig) {
-#ifdef CONFIG_COMPAT
- if (in_compat_syscall())
- ret = set_compat_user_sigmask((const compat_sigset_t __user *)sig,
- sigsz);
- else
-#endif
- ret = set_user_sigmask(sig, sigsz);
-
- if (ret)
- return ret;
- }
-
init_waitqueue_func_entry(&iowq.wq, io_wake_function);
iowq.wq.private = current;
INIT_LIST_HEAD(&iowq.wq.entry);
@@ -2624,6 +2611,19 @@ static int io_cqring_wait(struct io_ring_ctx *ctx, int min_events,
iowq.timeout = ktime_add_ns(timespec64_to_ktime(ts), ktime_get_ns());
}
+ if (sig) {
+#ifdef CONFIG_COMPAT
+ if (in_compat_syscall())
+ ret = set_compat_user_sigmask((const compat_sigset_t __user *)sig,
+ sigsz);
+ else
+#endif
+ ret = set_user_sigmask(sig, sigsz);
+
+ if (ret)
+ return ret;
+ }
+
trace_io_uring_cqring_wait(ctx, min_events);
do {
unsigned long check_cq;
--
2.44.0
