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ide: add ide_[un]lock_hwgroup() helpers

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Add ide_[un]lock_hwgroup() inline helpers for obtaining exclusive
access to the given hwgroup and update the core code accordingly.

[ This change besides making code saner results in more efficient
  use of ide_{get,release}_lock(). ]

Cc: Michael Schmitz <schmitz@biophys.uni-duesseldorf.de>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Elias Oltmanns <eo@nebensachen.de>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2009-01-02 16:12:50 +01:00
commit 631de3708d
3 changed files with 32 additions and 22 deletions
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20
include/linux/ide.h
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@ -1280,6 +1280,26 @@ extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
extern void ide_timer_expiry(unsigned long);
extern irqreturn_t ide_intr(int irq, void *dev_id);
static inline int ide_lock_hwgroup(ide_hwgroup_t *hwgroup)
{
if (hwgroup->busy)
return 1;
hwgroup->busy = 1;
/* for atari only */
ide_get_lock(ide_intr, hwgroup);
return 0;
}
static inline void ide_unlock_hwgroup(ide_hwgroup_t *hwgroup)
{
/* for atari only */
ide_release_lock();
hwgroup->busy = 0;
}
extern void do_ide_request(struct request_queue *);
void ide_init_disk(struct gendisk *, ide_drive_t *);