[PATCH RFC v7 11/23] dept: Apply sdt_might_sleep_weak() to hashed-waitqueue wait

Byungchul Park
2023-01-09T04:07:38Z

Makes Dept able to track dependencies by hashed-waitqueue waits, but
weakly.

Signed-off-by: Byungchul Park <byungchul.park@lge.com>
---
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 7725b75..bad30ba 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 {
void *flags;
@@ -246,6 +247,7 @@ struct wait_bit_queue_entry {
struct wait_bit_queue_entry __wbq_entry; \
long __ret = ret; /* explicit shadow */ \
\
+ sdt_might_sleep_weak(NULL); \
init_wait_var_entry(&__wbq_entry, var, \
exclusive ? WQ_FLAG_EXCLUSIVE : 0); \
for (;;) { \
@@ -263,6 +265,7 @@ struct wait_bit_queue_entry {
cmd; \
} \
finish_wait(__wq_head, &__wbq_entry.wq_entry); \
+ sdt_might_sleep_finish(); \
__out: __ret; \
})

--
1.9.1