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lockdep: merge the !_READ mark_lock_irq() helpers 

These two are also remakably similar

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2009-01-22 16:58:16 +01:00 committed by Ingo Molnar
parent 780e820b2d
commit 42c50d544e
1 changed files with 15 additions and 43 deletions
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58
kernel/lockdep.c
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@ -2057,31 +2057,39 @@ static int exclusive_bit(int new_bit)
return state | (dir ^ 2);
}
typedef int (*check_usage_f)(struct task_struct *, struct held_lock *,
enum lock_usage_bit bit, const char *name);
static int
mark_lock_irq_used_in(struct task_struct *curr, struct held_lock *this,
mark_lock_irq_write(struct task_struct *curr, struct held_lock *this,
int new_bit)
{
const char *name = state_name(new_bit);
const char *rname = state_rname(new_bit);
int excl_bit = exclusive_bit(new_bit);
int dir = new_bit & 2;
check_usage_f usage = dir ?
check_usage_backwards : check_usage_forwards;
if (!valid_state(curr, this, new_bit, excl_bit))
return 0;
if (!valid_state(curr, this, new_bit, excl_bit + 1))
return 0;
/*
* just marked it hardirq-safe, check that this lock
* took no hardirq-unsafe lock in the past:
*/
if (!check_usage_forwards(curr, this, excl_bit, name))
if (!usage(curr, this, excl_bit, name))
return 0;
#if STRICT_READ_CHECKS
/*
* just marked it hardirq-safe, check that this lock
* took no hardirq-unsafe-read lock in the past:
*/
if (!check_usage_forwards(curr, this, excl_bit + 1, rname))
if (!usage(curr, this, excl_bit + 1, rname))
return 0;
#endif
if (state_verbose(new_bit, hlock_class(this)))
@ -2125,40 +2133,6 @@ mark_lock_irq_read(struct task_struct *curr, struct held_lock *this,
return 1;
}
static int
mark_lock_irq_enabled(struct task_struct *curr, struct held_lock *this,
int new_bit)
{
const char *name = state_name(new_bit);
const char *rname = state_rname(new_bit);
int excl_bit = exclusive_bit(new_bit);
if (!valid_state(curr, this, new_bit, excl_bit))
return 0;
if (!valid_state(curr, this, new_bit, excl_bit + 1))
return 0;
/*
* just marked it hardirq-unsafe, check that no hardirq-safe
* lock in the system ever took it in the past:
*/
if (!check_usage_backwards(curr, this, excl_bit, name))
return 0;
#if STRICT_READ_CHECKS
/*
* just marked it hardirq-unsafe, check that no
* hardirq-safe-read lock in the system ever took
* it in the past:
*/
if (!check_usage_backwards(curr, this, excl_bit + 1, rname))
return 0;
#endif
if (state_verbose(new_bit, hlock_class(this)))
return 2;
return 1;
}
static int mark_lock_irq(struct task_struct *curr, struct held_lock *this,
enum lock_usage_bit new_bit)
{
@ -2168,7 +2142,10 @@ static int mark_lock_irq(struct task_struct *curr, struct held_lock *this,
case LOCK_USED_IN_HARDIRQ:
case LOCK_USED_IN_SOFTIRQ:
case LOCK_USED_IN_RECLAIM_FS:
return mark_lock_irq_used_in(curr, this, new_bit);
case LOCK_ENABLED_HARDIRQ:
case LOCK_ENABLED_SOFTIRQ:
case LOCK_ENABLED_RECLAIM_FS:
return mark_lock_irq_write(curr, this, new_bit);
case LOCK_USED_IN_HARDIRQ_READ:
case LOCK_USED_IN_SOFTIRQ_READ:
@ -2178,11 +2155,6 @@ static int mark_lock_irq(struct task_struct *curr, struct held_lock *this,
case LOCK_ENABLED_RECLAIM_FS_READ:
return mark_lock_irq_read(curr, this, new_bit);
case LOCK_ENABLED_HARDIRQ:
case LOCK_ENABLED_SOFTIRQ:
case LOCK_ENABLED_RECLAIM_FS:
return mark_lock_irq_enabled(curr, this, new_bit);
default:
WARN_ON(1);
break;