Commit-ID: c902a1e8d9c9b47cd8faa16892710247cdda9b02
Gitweb: https://git.kernel.org/tip/c902a1e8d9c9b47cd8faa16892710247cdda9b02
Author: Frederic Weisbecker <frederic@xxxxxxxxxx>
AuthorDate: Tue, 2 Apr 2019 18:02:42 +0200
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Thu, 18 Apr 2019 12:50:17 +0200
locking/lockdep: Map remaining magic numbers to lock usage mask names
Clarify the code with mapping some more constant numbers that haven't
been named after their corresponding LOCK_USAGE_* symbol.
Signed-off-by: Frederic Weisbecker <frederic@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Link: https://lkml.kernel.org/r/20190402160244.32434-3-frederic@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
kernel/locking/lockdep.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index 9c5819ef4a28..2288aa2fa4c6 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -516,11 +516,11 @@ static char get_usage_char(struct lock_class *class, enum lock_usage_bit bit)
{
char c = '.';
- if (class->usage_mask & lock_flag(bit + 2))
+ if (class->usage_mask & lock_flag(bit + LOCK_USAGE_DIR_MASK))
c = '+';
if (class->usage_mask & lock_flag(bit)) {
c = '-';
- if (class->usage_mask & lock_flag(bit + 2))
+ if (class->usage_mask & lock_flag(bit + LOCK_USAGE_DIR_MASK))
c = '?';
}
@@ -1971,7 +1971,10 @@ static const char *state_rnames[] = {
static inline const char *state_name(enum lock_usage_bit bit)
{
- return (bit & LOCK_USAGE_READ_MASK) ? state_rnames[bit >> 2] : state_names[bit >> 2];
+ if (bit & LOCK_USAGE_READ_MASK)
+ return state_rnames[bit >> LOCK_USAGE_DIR_MASK];
+ else
+ return state_names[bit >> LOCK_USAGE_DIR_MASK];
}
static int exclusive_bit(int new_bit)
@@ -3017,7 +3020,7 @@ static int (*state_verbose_f[])(struct lock_class *class) = {
static inline int state_verbose(enum lock_usage_bit bit,
struct lock_class *class)
{
- return state_verbose_f[bit >> 2](class);
+ return state_verbose_f[bit >> LOCK_USAGE_DIR_MASK](class);
}
typedef int (*check_usage_f)(struct task_struct *, struct held_lock *,
|