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ide: use mutex instead of ide_cfg_sem semaphore in IDE driver

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The IDE driver uses a semaphore as mutex.
Use the mutex API instead of the (binary) semaphore.

Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Matthias Kaehlcke 2007-07-09 23:17:55 +02:00 committed by Bartlomiej Zolnierkiewicz
parent c283f5dbe3
commit ef29888ea8
3 changed files with 9 additions and 9 deletions
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6
drivers/ide/ide-probe.c
View file

@ -1025,7 +1025,7 @@ static int init_irq (ide_hwif_t *hwif)
BUG_ON(irqs_disabled());
BUG_ON(hwif == NULL);
down(&ide_cfg_sem);
mutex_lock(&ide_cfg_mtx);
hwif->hwgroup = NULL;
#if MAX_HWIFS > 1
/*
@ -1154,7 +1154,7 @@ static int init_irq (ide_hwif_t *hwif)
printk(" (%sed with %s)",
hwif->sharing_irq ? "shar" : "serializ", match->name);
printk("\n");
up(&ide_cfg_sem);
mutex_unlock(&ide_cfg_mtx);
return 0;
out_unlink:
spin_lock_irq(&ide_lock);
@ -1177,7 +1177,7 @@ static int init_irq (ide_hwif_t *hwif)
}
spin_unlock_irq(&ide_lock);
out_up:
up(&ide_cfg_sem);
mutex_unlock(&ide_cfg_mtx);
return 1;
}

8
drivers/ide/ide.c
View file

@ -169,7 +169,7 @@ static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
static int idebus_parameter; /* holds the "idebus=" parameter */
static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
DECLARE_MUTEX(ide_cfg_sem);
DEFINE_MUTEX(ide_cfg_mtx);
__cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
#ifdef CONFIG_IDEPCI_PCIBUS_ORDER
@ -564,7 +564,7 @@ void ide_unregister(unsigned int index)
{
ide_drive_t *drive;
ide_hwif_t *hwif, *g;
static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
ide_hwgroup_t *hwgroup;
int irq_count = 0, unit;
@ -572,7 +572,7 @@ void ide_unregister(unsigned int index)
BUG_ON(in_interrupt());
BUG_ON(irqs_disabled());
down(&ide_cfg_sem);
mutex_lock(&ide_cfg_mtx);
spin_lock_irq(&ide_lock);
hwif = &ide_hwifs[index];
if (!hwif->present)
@ -679,7 +679,7 @@ void ide_unregister(unsigned int index)
abort:
spin_unlock_irq(&ide_lock);
up(&ide_cfg_sem);
mutex_unlock(&ide_cfg_mtx);
}
EXPORT_SYMBOL(ide_unregister);

4
include/linux/ide.h
View file

@ -1382,11 +1382,11 @@ extern const ide_pio_timings_t ide_pio_timings[6];
extern spinlock_t ide_lock;
extern struct semaphore ide_cfg_sem;
extern struct mutex ide_cfg_mtx;
/*
* Structure locking:
*
* ide_cfg_sem and ide_lock together protect changes to
* ide_cfg_mtx and ide_lock together protect changes to
* ide_hwif_t->{next,hwgroup}
* ide_drive_t->next
*