[PATCH v19 13/40] dept: apply sdt_might_sleep_{start,end}() to hashed-waitqueue wait

Byungchul Park <[email protected]> Mon, 6 Jul 2026 15:19:01 +0900
Newsgroups org.kernel.vger.rcu,dev.linux.lists.linux-rt-devel,org.freedesktop.lists.dri-devel,org.kernel.vger.linux-arch,org.kernel.vger.linux-block,org.kernel.vger.linux-doc,org.kernel.vger.linux-ext4,org.kernel.vger.linux-fsdevel,org.kernel.vger.linux-i2c,org.kernel.vger.linux-ide,org.kernel.vger.linux-kernel,org.kernel.vger.linux-media,org.kernel.vger.linux-modules,org.kernel.vger.linux-nfs,org.kernel.vger.netdev,org.kernel.vger.rust-for-linux,org.kvack.linux-mm
Message-ID <[email protected]> 
Make dept able to track dependencies by hashed-waitqueue waits.

Signed-off-by: Byungchul Park <[email protected]>
---
 include/linux/wait_bit.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/wait_bit.h b/include/linux/wait_bit.h
index 9e29d79fc790..179a616ad245 100644
--- a/include/linux/wait_bit.h
+++ b/include/linux/wait_bit.h
@@ -6,6 +6,7 @@
  * Linux wait-bit related types and methods:
  */
 #include <linux/wait.h>
+#include <linux/dept_sdt.h>
 
 struct wait_bit_key {
 	unsigned long		*flags;
@@ -257,6 +258,7 @@ extern wait_queue_head_t *__var_waitqueue(void *p);
 	struct wait_bit_queue_entry __wbq_entry;			\
 	long __ret = ret; /* explicit shadow */				\
 									\
+	sdt_might_sleep_start(NULL);					\
 	init_wait_var_entry(&__wbq_entry, var,				\
 			    exclusive ? WQ_FLAG_EXCLUSIVE : 0);		\
 	for (;;) {							\
@@ -274,6 +276,7 @@ extern wait_queue_head_t *__var_waitqueue(void *p);
 		cmd;							\
 	}								\
 	finish_wait(__wq_head, &__wbq_entry.wq_entry);			\
+	sdt_might_sleep_end();						\
 __out:	__ret;								\
 })
 
-- 
2.17.1