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Message-ID: <47121520.90704@namesys.com>
Date: Sun, 14 Oct 2007 17:09:52 +0400
From: Edward Shishkin <edward@...esys.com>
To: Laurent Riffard <laurent.riffard@...e.fr>
CC: Andrew Morton <akpm@...ux-foundation.org>,
Neil Brown <neilb@...e.de>, linux-kernel@...r.kernel.org,
reiserfs-devel@...r.kernel.org, Jens Axboe <jens.axboe@...cle.com>,
Paul Jackson <pj@....com>
Subject: Re: [PATCH] Reiser4: Drop 'size' argument from bio_endio and bi_end_io
Laurent Riffard wrote:
>Reiser4: Drop 'size' argument from bio_endio and bi_end_io
>
>This patch pushes into Reiser4 the changes introduced by
>commit 6712ecf8f648118c3363c142196418f89a510b90:
>
> As bi_end_io is only called once when the request is complete,
> the 'size' argument is now redundant. Remove it.
>
> Now there is no need for bio_endio to subtract the size completed
> from bi_size. So don't do that either.
>
> While we are at it, change bi_end_io to return void.
>
>Please review.
>
>
Thanks!
Signed-Off-By: Edward Shishkin <edward@...esys.com>
>Signed-Off-By: Laurent Riffard <laurent.riffard@...e.fr>
>---
> fs/reiser4/flush_queue.c | 10 ++--------
> fs/reiser4/page_cache.c | 24 ++++--------------------
> fs/reiser4/status_flags.c | 7 +------
> 3 files changed, 7 insertions(+), 34 deletions(-)
>
>Index: linux-2.6-mm/fs/reiser4/flush_queue.c
>===================================================================
>--- linux-2.6-mm.orig/fs/reiser4/flush_queue.c
>+++ linux-2.6-mm/fs/reiser4/flush_queue.c
>@@ -391,9 +391,8 @@ int atom_fq_parts_are_clean(txn_atom * a
> }
> #endif
> /* Bio i/o completion routine for reiser4 write operations. */
>-static int
>-end_io_handler(struct bio *bio, unsigned int bytes_done UNUSED_ARG,
>- int err)
>+static void
>+end_io_handler(struct bio *bio, int err)
> {
> int i;
> int nr_errors = 0;
>@@ -401,10 +400,6 @@ end_io_handler(struct bio *bio, unsigned
>
> assert("zam-958", bio->bi_rw & WRITE);
>
>- /* i/o op. is not fully completed */
>- if (bio->bi_size != 0)
>- return 1;
>-
> if (err == -EOPNOTSUPP)
> set_bit(BIO_EOPNOTSUPP, &bio->bi_flags);
>
>@@ -447,7 +442,6 @@ end_io_handler(struct bio *bio, unsigned
> }
>
> bio_put(bio);
>- return 0;
> }
>
> /* Count I/O requests which will be submitted by @bio in given flush queues
>Index: linux-2.6-mm/fs/reiser4/page_cache.c
>===================================================================
>--- linux-2.6-mm.orig/fs/reiser4/page_cache.c
>+++ linux-2.6-mm/fs/reiser4/page_cache.c
>@@ -320,18 +320,11 @@ reiser4_tree *reiser4_tree_by_page(const
> mpage_end_io_read() would also do. But it's static.
>
> */
>-static int
>-end_bio_single_page_read(struct bio *bio, unsigned int bytes_done UNUSED_ARG,
>- int err UNUSED_ARG)
>+static void
>+end_bio_single_page_read(struct bio *bio, int err UNUSED_ARG)
> {
> struct page *page;
>
>- if (bio->bi_size != 0) {
>- warning("nikita-3332", "Truncated single page read: %i",
>- bio->bi_size);
>- return 1;
>- }
>-
> page = bio->bi_io_vec[0].bv_page;
>
> if (test_bit(BIO_UPTODATE, &bio->bi_flags)) {
>@@ -342,7 +335,6 @@ end_bio_single_page_read(struct bio *bio
> }
> unlock_page(page);
> bio_put(bio);
>- return 0;
> }
>
> /* completion handler for single page bio-based write.
>@@ -350,25 +342,17 @@ end_bio_single_page_read(struct bio *bio
> mpage_end_io_write() would also do. But it's static.
>
> */
>-static int
>-end_bio_single_page_write(struct bio *bio, unsigned int bytes_done UNUSED_ARG,
>- int err UNUSED_ARG)
>+static void
>+end_bio_single_page_write(struct bio *bio, int err UNUSED_ARG)
> {
> struct page *page;
>
>- if (bio->bi_size != 0) {
>- warning("nikita-3333", "Truncated single page write: %i",
>- bio->bi_size);
>- return 1;
>- }
>-
> page = bio->bi_io_vec[0].bv_page;
>
> if (!test_bit(BIO_UPTODATE, &bio->bi_flags))
> SetPageError(page);
> end_page_writeback(page);
> bio_put(bio);
>- return 0;
> }
>
> /* ->readpage() method for formatted nodes */
>Index: linux-2.6-mm/fs/reiser4/status_flags.c
>===================================================================
>--- linux-2.6-mm.orig/fs/reiser4/status_flags.c
>+++ linux-2.6-mm/fs/reiser4/status_flags.c
>@@ -15,12 +15,8 @@
> /* This is our end I/O handler that marks page uptodate if IO was successful. It also
> unconditionally unlocks the page, so we can see that io was done.
> We do not free bio, because we hope to reuse that. */
>-static int reiser4_status_endio(struct bio *bio, unsigned int bytes_done,
>- int err)
>+static void reiser4_status_endio(struct bio *bio, int err)
> {
>- if (bio->bi_size)
>- return 1;
>-
> if (test_bit(BIO_UPTODATE, &bio->bi_flags)) {
> SetPageUptodate(bio->bi_io_vec->bv_page);
> } else {
>@@ -28,7 +24,6 @@ static int reiser4_status_endio(struct b
> SetPageError(bio->bi_io_vec->bv_page);
> }
> unlock_page(bio->bi_io_vec->bv_page);
>- return 0;
> }
>
> /* Initialise status code. This is expected to be called from the disk format
>
>
>-
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>
>
>
>
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