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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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4
fs/jbd/checkpoint.c
View File

@@ -254,7 +254,9 @@ __flush_batch(journal_t *journal, struct buffer_head **bhs, int *batch_count)
{
int i;
ll_rw_block(SWRITE, *batch_count, bhs);
for (i = 0; i < *batch_count; i++)
write_dirty_buffer(bhs[i], WRITE);
for (i = 0; i < *batch_count; i++) {
struct buffer_head *bh = bhs[i];
clear_buffer_jwrite(bh);

2
fs/jbd/journal.c
View File

@@ -1024,7 +1024,7 @@ void journal_update_superblock(journal_t *journal, int wait)
if (wait)
sync_dirty_buffer(bh);
else
ll_rw_block(SWRITE, 1, &bh);
write_dirty_buffer(bh, WRITE);
out:
/* If we have just flushed the log (by marking s_start==0), then

2
fs/jbd/revoke.c
View File

@@ -617,7 +617,7 @@ static void flush_descriptor(journal_t *journal,
set_buffer_jwrite(bh);
BUFFER_TRACE(bh, "write");
set_buffer_dirty(bh);
ll_rw_block((write_op == WRITE) ? SWRITE : SWRITE_SYNC_PLUG, 1, &bh);
write_dirty_buffer(bh, write_op);
}
#endif