diff options
| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2022-03-11 16:03:42 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-03-14 10:09:28 +0000 |
| commit | fbd9a2ceba5c74bbfa19cf257ae4b4b2c820860d (patch) | |
| tree | d0d852fb3a532af0b709b993879ecfe758bd0d71 /include | |
| parent | d96657dc9238f8e9bda47b377e17e7c6f90935af (diff) | |
| download | linux-next-fbd9a2ceba5c74bbfa19cf257ae4b4b2c820860d.tar.gz | |
net: Add lockdep asserts to ____napi_schedule().
____napi_schedule() needs to be invoked with disabled interrupts due to
__raise_softirq_irqoff (in order not to corrupt the per-CPU list).
____napi_schedule() needs also to be invoked from an interrupt context
so that the raised-softirq is processed while the interrupt context is
left.
Add lockdep asserts for both conditions.
While this is the second time the irq/softirq check is needed, provide a
generic lockdep_assert_softirq_will_run() which is used by both caller.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/lockdep.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h index 467b94257105..0cc65d216701 100644 --- a/include/linux/lockdep.h +++ b/include/linux/lockdep.h @@ -329,6 +329,12 @@ extern void lock_unpin_lock(struct lockdep_map *lock, struct pin_cookie); #define lockdep_assert_none_held_once() \ lockdep_assert_once(!current->lockdep_depth) +/* + * Ensure that softirq is handled within the callchain and not delayed and + * handled by chance. + */ +#define lockdep_assert_softirq_will_run() \ + lockdep_assert_once(hardirq_count() | softirq_count()) #define lockdep_recursing(tsk) ((tsk)->lockdep_recursion) @@ -414,6 +420,7 @@ extern int lockdep_is_held(const void *); #define lockdep_assert_held_read(l) do { (void)(l); } while (0) #define lockdep_assert_held_once(l) do { (void)(l); } while (0) #define lockdep_assert_none_held_once() do { } while (0) +#define lockdep_assert_softirq_will_run() do { } while (0) #define lockdep_recursing(tsk) (0) |