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buffer: switch do_emergency_thaw() away from pdflush_operation()

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This is (again) a preparatory patch similar to commit
a2a9537ac0. It open codes a simple
async way of executing do_thaw_all() out of context, so we can get
rid of pdflush.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe 2009-04-08 13:44:08 +02:00
parent 329007ce25
commit 053c525fcf
1 changed files with 9 additions and 2 deletions
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11
fs/buffer.c
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@ -547,7 +547,7 @@ static int osync_buffers_list(spinlock_t *lock, struct list_head *list)
return err; return err;
} }
void do_thaw_all(unsigned long unused) void do_thaw_all(struct work_struct *work)
{ {
struct super_block *sb; struct super_block *sb;
char b[BDEVNAME_SIZE]; char b[BDEVNAME_SIZE];
@ -567,6 +567,7 @@ void do_thaw_all(unsigned long unused)
goto restart; goto restart;
} }
spin_unlock(&sb_lock); spin_unlock(&sb_lock);
kfree(work);
printk(KERN_WARNING "Emergency Thaw complete\n"); printk(KERN_WARNING "Emergency Thaw complete\n");
} }
@ -577,7 +578,13 @@ void do_thaw_all(unsigned long unused)
*/ */
void emergency_thaw_all(void) void emergency_thaw_all(void)
{ {
pdflush_operation(do_thaw_all, 0); struct work_struct *work;
work = kmalloc(sizeof(*work), GFP_ATOMIC);
if (work) {
INIT_WORK(work, do_thaw_all);
schedule_work(work);
}
} }
/** /**