From: Sergey Senozhatsky <senozhatsky@chromium.org>
Date: Tue, 10 Jun 2025 04:52:28 +0000 (+0900)
Subject: sched/wait: Add wait_event_state_exclusive()
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=dd6a5a71c811289eec234e78cb9ca34d055d2ad5;p=thirdparty%2Fkernel%2Fstable.git

sched/wait: Add wait_event_state_exclusive()

Allows exclusive waits with a custom @state.

Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
---

diff --git a/include/linux/wait.h b/include/linux/wait.h
index 09855d8194180..f648044466d5f 100644
--- a/include/linux/wait.h
+++ b/include/linux/wait.h
@@ -965,6 +965,18 @@ extern int do_wait_intr_irq(wait_queue_head_t *, wait_queue_entry_t *);
 	__ret;									\
 })
 
+#define __wait_event_state_exclusive(wq, condition, state)			\
+	___wait_event(wq, condition, state, 1, 0, schedule())
+
+#define wait_event_state_exclusive(wq, condition, state)			\
+({										\
+	int __ret = 0;								\
+	might_sleep();								\
+	if (!(condition))							\
+		__ret = __wait_event_state_exclusive(wq, condition, state);	\
+	__ret;									\
+})
+
 #define __wait_event_killable_timeout(wq_head, condition, timeout)		\
 	___wait_event(wq_head, ___wait_cond_timeout(condition),			\
 		      TASK_KILLABLE, 0, timeout,				\