summaryrefslogtreecommitdiffstats
path: root/kernel/locking
diff options
context:
space:
mode:
authorYuyang Du <duyuyang@gmail.com>2019-05-06 16:19:37 +0800
committerIngo Molnar <mingo@kernel.org>2019-06-03 11:55:51 +0200
commit091806515124b20f8cff7927b4b7ff399483b109 (patch)
tree08ecf0e7c42ffb957e7ce7549cbb35300c170337 /kernel/locking
parent68e9dc29f8f42c79d2a3755223ed910ce36b4ae2 (diff)
downloadlinux-091806515124b20f8cff7927b4b7ff399483b109.tar.bz2
locking/lockdep: Consolidate lock usage bit initialization
Lock usage bit initialization is consolidated into one function mark_usage(). Trivial readability improvement. No functional change. Signed-off-by: Yuyang Du <duyuyang@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: bvanassche@acm.org Cc: frederic@kernel.org Cc: ming.lei@redhat.com Cc: will.deacon@arm.com Link: https://lkml.kernel.org/r/20190506081939.74287-22-duyuyang@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/locking')
-rw-r--r--kernel/locking/lockdep.c22
1 files changed, 14 insertions, 8 deletions
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index 63b82921698d..1123e7e6c78d 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -3460,8 +3460,12 @@ void trace_softirqs_off(unsigned long ip)
debug_atomic_inc(redundant_softirqs_off);
}
-static int mark_irqflags(struct task_struct *curr, struct held_lock *hlock)
+static int
+mark_usage(struct task_struct *curr, struct held_lock *hlock, int check)
{
+ if (!check)
+ goto lock_used;
+
/*
* If non-trylock use in a hardirq or softirq context, then
* mark the lock as used in these contexts:
@@ -3505,6 +3509,11 @@ static int mark_irqflags(struct task_struct *curr, struct held_lock *hlock)
}
}
+lock_used:
+ /* mark it as used: */
+ if (!mark_lock(curr, hlock, LOCK_USED))
+ return 0;
+
return 1;
}
@@ -3546,8 +3555,8 @@ int mark_lock_irq(struct task_struct *curr, struct held_lock *this,
return 1;
}
-static inline int mark_irqflags(struct task_struct *curr,
- struct held_lock *hlock)
+static inline int
+mark_usage(struct task_struct *curr, struct held_lock *hlock, int check)
{
return 1;
}
@@ -3833,11 +3842,8 @@ static int __lock_acquire(struct lockdep_map *lock, unsigned int subclass,
#endif
hlock->pin_count = pin_count;
- if (check && !mark_irqflags(curr, hlock))
- return 0;
-
- /* mark it as used: */
- if (!mark_lock(curr, hlock, LOCK_USED))
+ /* Initialize the lock usage bit */
+ if (!mark_usage(curr, hlock, check))
return 0;
/*