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block: shortcut writebuffer_flush if writing is disabled 

Saves a few bytes of binary space.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2013-07-19 11:58:43 +02:00
parent 8c41c54da8
commit c7848ffee2
1 changed files with 3 additions and 0 deletions
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3
common/block.c
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@ -43,6 +43,9 @@ static int writebuffer_flush(struct block_device *blk)
{
struct chunk *chunk;
if (!IS_ENABLED(CONFIG_BLOCK_WRITE))
return 0;
list_for_each_entry(chunk, &blk->buffered_blocks, list) {
if (chunk->dirty) {
blk->ops->write(blk, chunk->data, chunk->block_start, blk->rdbufsize);