[PATCH v15 35/43] dept: make dept stop from working on debug_locks_off()
From: Byungchul Park <byungchul@sk.com>
Date: 2025-05-13 10:08:10
Also in:
dri-devel, linux-block, linux-ext4, linux-fsdevel, linux-ide, linux-mm, lkml
Subsystem:
library code, the rest · Maintainers:
Andrew Morton, Linus Torvalds
For many reasons, debug_locks_off() is called to stop lock debuging feature e.g. on panic(). dept should also stop it in the conditions. Signed-off-by: Byungchul Park <byungchul@sk.com> --- include/linux/dept.h | 2 ++ kernel/dependency/dept.c | 6 ++++++ lib/debug_locks.c | 2 ++ 3 files changed, 10 insertions(+)
diff --git a/include/linux/dept.h b/include/linux/dept.h
index 19d72b0b0c4b..a6ff9db9bcf9 100644
--- a/include/linux/dept.h
+++ b/include/linux/dept.h@@ -395,6 +395,7 @@ struct dept_ext_wgen { unsigned int wgen; }; +extern void dept_stop_emerg(void); extern void dept_on(void); extern void dept_off(void); extern void dept_init(void);
@@ -447,6 +448,7 @@ struct dept_ext_wgen { }; #define DEPT_MAP_INITIALIZER(n, k) { } +#define dept_stop_emerg() do { } while (0) #define dept_on() do { } while (0) #define dept_off() do { } while (0) #define dept_init() do { } while (0)
diff --git a/kernel/dependency/dept.c b/kernel/dependency/dept.c
index 5397167c7031..3313ac4df3a6 100644
--- a/kernel/dependency/dept.c
+++ b/kernel/dependency/dept.c@@ -186,6 +186,12 @@ static void dept_unlock(void) arch_spin_unlock(&dept_spin); } +void dept_stop_emerg(void) +{ + WRITE_ONCE(dept_stop, 1); +} +EXPORT_SYMBOL_GPL(dept_stop_emerg); + enum bfs_ret { BFS_CONTINUE, BFS_DONE,
diff --git a/lib/debug_locks.c b/lib/debug_locks.c
index a75ee30b77cb..14a965914a8f 100644
--- a/lib/debug_locks.c
+++ b/lib/debug_locks.c@@ -38,6 +38,8 @@ EXPORT_SYMBOL_GPL(debug_locks_silent); */ int debug_locks_off(void) { + dept_stop_emerg(); + if (debug_locks && __debug_locks_off()) { if (!debug_locks_silent) { console_verbose();
--
2.17.1