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locking/lockdep: Map remaining magic numbers to lock usage mask names

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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@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Link: https://lkml.kernel.org/r/20190402160244.32434-3-frederic@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Frederic Weisbecker 2019-04-02 18:02:42 +02:00 committed by Ingo Molnar
parent 0d2cc3b345
commit c902a1e8d9
1 changed files with 7 additions and 4 deletions
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11
kernel/locking/lockdep.c
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@ -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 *,