Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

lockdep: fully reduce mark_lock_irq()

Browse source 
Now what its only two functions, they again look rather 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 17:18:32 +01:00 committed by Ingo Molnar
parent 42c50d544e
commit 9d3651a23d
1 changed files with 9 additions and 79 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

88
kernel/lockdep.c
View file

@ -2061,13 +2061,13 @@ typedef int (*check_usage_f)(struct task_struct *, struct held_lock *,
enum lock_usage_bit bit, const char *name);
static int
mark_lock_irq_write(struct task_struct *curr, struct held_lock *this,
int new_bit)
mark_lock_irq(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 read = new_bit & 1;
int dir = new_bit & 2;
check_usage_f usage = dir ?
@ -2075,57 +2075,17 @@ mark_lock_irq_write(struct task_struct *curr, struct held_lock *this,
if (!valid_state(curr, this, new_bit, excl_bit))
return 0;
if (!valid_state(curr, this, new_bit, excl_bit + 1))
if (!read && !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 (!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 (!usage(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_read(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;
if (!valid_state(curr, this, new_bit, excl_bit))
if ((!read || (!dir || STRICT_READ_CHECKS)) &&
!usage(curr, this, excl_bit, name))
return 0;
if (!dir) {
/*
* just marked it hardirq-read-safe, check that this lock
* took no hardirq-unsafe lock in the past:
*/
if (!check_usage_forwards(curr, this, excl_bit, name))
return 0;
} else if (STRICT_READ_CHECKS) {
/*
* just marked it hardirq-read-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 ((!read && STRICT_READ_CHECKS) &&
!usage(curr, this, excl_bit + 1, rname))
return 0;
if (state_verbose(new_bit, hlock_class(this)))
return 2;
@ -2133,36 +2093,6 @@ mark_lock_irq_read(struct task_struct *curr, struct held_lock *this,
return 1;
}
static int mark_lock_irq(struct task_struct *curr, struct held_lock *this,
enum lock_usage_bit new_bit)
{
int ret = 1;
switch(new_bit) {
case LOCK_USED_IN_HARDIRQ:
case LOCK_USED_IN_SOFTIRQ:
case LOCK_USED_IN_RECLAIM_FS:
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:
case LOCK_USED_IN_RECLAIM_FS_READ:
case LOCK_ENABLED_HARDIRQ_READ:
case LOCK_ENABLED_SOFTIRQ_READ:
case LOCK_ENABLED_RECLAIM_FS_READ:
return mark_lock_irq_read(curr, this, new_bit);
default:
WARN_ON(1);
break;
}
return ret;
}
enum mark_type {
#define LOCKDEP_STATE(__STATE) __STATE,
#include "lockdep_states.h"