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remove SWRITE* I/O types

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These flags aren't real I/O types, but tell ll_rw_block to always
lock the buffer instead of giving up on a failed trylock.

Instead add a new write_dirty_buffer helper that implements this semantic
and use it from the existing SWRITE* callers.  Note that the ll_rw_block
code had a bug where it didn't promote WRITE_SYNC_PLUG properly, which
this patch fixes.

In the ufs code clean up the helper that used to call ll_rw_block
to mirror sync_dirty_buffer, which is the function it implements for
compound buffers.

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 17:06:24 +02:00
committed by Al Viro
parent 87e99511ea
commit 9cb569d601
16 changed files with 73 additions and 94 deletions
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20
fs/ufs/util.c
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@@ -113,21 +113,17 @@ void ubh_mark_buffer_uptodate (struct ufs_buffer_head * ubh, int flag)
}
}
void ubh_ll_rw_block(int rw, struct ufs_buffer_head *ubh)
void ubh_sync_block(struct ufs_buffer_head *ubh)
{
if (!ubh)
return;
if (ubh) {
unsigned i;
ll_rw_block(rw, ubh->count, ubh->bh);
}
for (i = 0; i < ubh->count; i++)
write_dirty_buffer(ubh->bh[i], WRITE);
void ubh_wait_on_buffer (struct ufs_buffer_head * ubh)
{
unsigned i;
if (!ubh)
return;
for ( i = 0; i < ubh->count; i++ )
wait_on_buffer (ubh->bh[i]);
for (i = 0; i < ubh->count; i++)
wait_on_buffer(ubh->bh[i]);
}
}
void ubh_bforget (struct ufs_buffer_head * ubh)