diff options
| author | Dmitry Monakhov <dmonakhov@openvz.org> | 2007-10-16 01:24:47 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 09:42:53 -0700 |
| commit | 68671f35fe8d785277118a333c88768a4f894917 (patch) | |
| tree | 50cb5a378db1b021c2ec3573388af3480df49791 /fs | |
| parent | ef8b4520bd9f8294ffce9abd6158085bde5dc902 (diff) | |
| download | kernel-crypto-68671f35fe8d785277118a333c88768a4f894917.tar.gz kernel-crypto-68671f35fe8d785277118a333c88768a4f894917.tar.xz kernel-crypto-68671f35fe8d785277118a333c88768a4f894917.zip | |
mm: add end_buffer_read helper function
Move duplicated code from end_buffer_read_XXX methods to separate helper
function.
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/buffer.c | 32 |
1 files changed, 17 insertions, 15 deletions
diff --git a/fs/buffer.c b/fs/buffer.c index 75b51dfa5e0..b144fc367b8 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -110,10 +110,14 @@ static void buffer_io_error(struct buffer_head *bh) } /* - * Default synchronous end-of-IO handler.. Just mark it up-to-date and - * unlock the buffer. This is what ll_rw_block uses too. + * End-of-IO handler helper function which does not touch the bh after + * unlocking it. + * Note: unlock_buffer() sort-of does touch the bh after unlocking it, but + * a race there is benign: unlock_buffer() only use the bh's address for + * hashing after unlocking the buffer, so it doesn't actually touch the bh + * itself. */ -void end_buffer_read_sync(struct buffer_head *bh, int uptodate) +static void __end_buffer_read_notouch(struct buffer_head *bh, int uptodate) { if (uptodate) { set_buffer_uptodate(bh); @@ -122,6 +126,15 @@ void end_buffer_read_sync(struct buffer_head *bh, int uptodate) clear_buffer_uptodate(bh); } unlock_buffer(bh); +} + +/* + * Default synchronous end-of-IO handler.. Just mark it up-to-date and + * unlock the buffer. This is what ll_rw_block uses too. + */ +void end_buffer_read_sync(struct buffer_head *bh, int uptodate) +{ + __end_buffer_read_notouch(bh, uptodate); put_bh(bh); } @@ -2245,21 +2258,10 @@ out_unlock: * nobh_prepare_write()'s prereads are special: the buffer_heads are freed * immediately, while under the page lock. So it needs a special end_io * handler which does not touch the bh after unlocking it. - * - * Note: unlock_buffer() sort-of does touch the bh after unlocking it, but - * a race there is benign: unlock_buffer() only use the bh's address for - * hashing after unlocking the buffer, so it doesn't actually touch the bh - * itself. */ static void end_buffer_read_nobh(struct buffer_head *bh, int uptodate) { - if (uptodate) { - set_buffer_uptodate(bh); - } else { - /* This happens, due to failed READA attempts. */ - clear_buffer_uptodate(bh); - } - unlock_buffer(bh); + __end_buffer_read_notouch(bh, uptodate); } /* |