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author | Kees Cook <keescook@chromium.org> | 2021-09-29 15:02:14 -0700 |
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committer | Peter Zijlstra <peterz@infradead.org> | 2021-10-15 11:25:14 +0200 |
commit | 42a20f86dc19f9282d974df0ba4d226c865ab9dd (patch) | |
tree | 548e09e31785a53f7907e0e4c28471d0e53fcbb5 /include/linux/sched.h | |
parent | bc9bbb81730ea667c31c5b284f95ee312bab466f (diff) | |
download | linux-stable-42a20f86dc19f9282d974df0ba4d226c865ab9dd.tar.gz linux-stable-42a20f86dc19f9282d974df0ba4d226c865ab9dd.tar.bz2 linux-stable-42a20f86dc19f9282d974df0ba4d226c865ab9dd.zip |
sched: Add wrapper for get_wchan() to keep task blocked
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
Diffstat (limited to 'include/linux/sched.h')
-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 343603f77f8b..5f8db54226af 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -2139,6 +2139,7 @@ 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 |