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kill BH_Ordered flag

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Instead of abusing a buffer_head flag just add a variant of
sync_dirty_buffer which allows passing the exact type of write
flag required.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Christoph Hellwig 2010-08-11 17:05:45 +02:00 • committed by Al Viro
parent dad5eb6daa
commit 87e99511ea
5 changed files with 63 additions and 73 deletions
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17
fs/buffer.c
View file

@ -2911,13 +2911,6 @@ int submit_bh(int rw, struct buffer_head * bh)
BUG_ON(buffer_delay(bh));
BUG_ON(buffer_unwritten(bh));
/*
* Mask in barrier bit for a write (could be either a WRITE or a
* WRITE_SYNC
*/
if (buffer_ordered(bh) && (rw & WRITE))
rw |= WRITE_BARRIER;
/*
* Only clear out a write error when rewriting
*/
@ -3021,7 +3014,7 @@ EXPORT_SYMBOL(ll_rw_block);
* and then start new I/O and then wait upon it. The caller must have a ref on
* the buffer_head.
*/
int sync_dirty_buffer(struct buffer_head *bh)
int __sync_dirty_buffer(struct buffer_head *bh, int rw)
{
int ret = 0;
@ -3030,7 +3023,7 @@ int sync_dirty_buffer(struct buffer_head *bh)
if (test_clear_buffer_dirty(bh)) {
get_bh(bh);
bh->b_end_io = end_buffer_write_sync;
ret = submit_bh(WRITE_SYNC, bh);
ret = submit_bh(rw, bh);
wait_on_buffer(bh);
if (buffer_eopnotsupp(bh)) {
clear_buffer_eopnotsupp(bh);
@ -3043,6 +3036,12 @@ int sync_dirty_buffer(struct buffer_head *bh)
}
return ret;
}
EXPORT_SYMBOL(__sync_dirty_buffer);
int sync_dirty_buffer(struct buffer_head *bh)
{
return __sync_dirty_buffer(bh, WRITE_SYNC);
}
EXPORT_SYMBOL(sync_dirty_buffer);
/*