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dm: rearrange dm_wq_work

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Refactor dm_wq_work() to make later patch more readable.

Signed-off-by: Alasdair G Kergon <[email protected]>
This commit is contained in:
Alasdair G Kergon 2009-04-09 00:27:13 +01:00
commit df12ee9963
1 changed files with 9 additions and 8 deletions
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17
drivers/md/dm.c
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@ -1437,18 +1437,19 @@ static void dm_wq_work(struct work_struct *work)
down_write(&md->io_lock);
next_bio:
spin_lock_irq(&md->deferred_lock);
c = bio_list_pop(&md->deferred);
spin_unlock_irq(&md->deferred_lock);
while (1) {
spin_lock_irq(&md->deferred_lock);
c = bio_list_pop(&md->deferred);
spin_unlock_irq(&md->deferred_lock);
if (!c) {
clear_bit(DMF_BLOCK_IO, &md->flags);
break;
}
if (c) {
__split_and_process_bio(md, c);
goto next_bio;
}
clear_bit(DMF_BLOCK_IO, &md->flags);
up_write(&md->io_lock);
}