diff options
| author | Kees Cook <keescook@chromium.org> | 2021-09-29 15:02:14 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-11-17 11:04:16 +0100 |
| commit | e9ede14c116f1a6246eee89d320d60a90a86b5d5 (patch) | |
| tree | f63d77d881844fde4fceb3ae6e6626e41d57026c /include/linux | |
| parent | 38bdcbf9828f11f6ae8b55a9431b4349655f2c09 (diff) | |
sched: Add wrapper for get_wchan() to keep task blocked
[ Upstream commit 42a20f86dc19f9282d974df0ba4d226c865ab9dd ]
Having a stable wchan means the process must be blocked and for it to
stay that way while performing stack unwinding.
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> [arm]
Tested-by: Mark Rutland <mark.rutland@arm.com> [arm64]
Link: https://lkml.kernel.org/r/20211008111626.332092234@infradead.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/sched.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 8e10c7accdbc..4ee118cf0697 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -2030,6 +2030,7 @@ static inline void set_task_cpu(struct task_struct *p, unsigned int cpu) #endif /* CONFIG_SMP */ extern bool sched_task_on_rq(struct task_struct *p); +extern unsigned long get_wchan(struct task_struct *p); /* * In order to reduce various lock holder preemption latencies provide an |