linux.git/fs/bio.c, branch v2.6.26

docbook: fix bio missing parameter

2008-05-07T16:35:03+00:00

Fix fs/bio.c kernel-doc parameter warning:
Warning(linux-2.6.25-git14//fs/bio.c:972): No description found for parameter 'reading'

Signed-off-by: Randy Dunlap 
Signed-off-by: Jens Axboe

block: use unitialized_var() in bio_alloc_bioset()

2008-05-07T11:26:27+00:00

Better than setting idx to some random value and it silences the
same bogus gcc warning.

Signed-off-by: Jens Axboe

block: add dma alignment and padding support to blk_rq_map_kern

2008-04-29T07:50:34+00:00

This patch adds bio_copy_kern similar to
bio_copy_user. blk_rq_map_kern uses bio_copy_kern instead of
bio_map_kern if necessary.

bio_copy_kern uses temporary pages and the bi_end_io callback frees
these pages. bio_copy_kern saves the original kernel buffer at
bio->bi_private it doesn't use something like struct bio_map_data to
store the information about the caller.

Signed-off-by: FUJITA Tomonori 
Cc: Tejun Heo 
Signed-off-by: Jens Axboe

block: convert bio_copy_user to bio_copy_user_iov

2008-04-21T07:50:08+00:00

This patch enables bio_copy_user to take struct sg_iovec (renamed
bio_copy_user_iov). bio_copy_user uses bio_copy_user_iov internally as
bio_map_user uses bio_map_user_iov.

The major changes are:

- adds sg_iovec array to struct bio_map_data

- adds __bio_copy_iov that copy data between bio and
sg_iovec. bio_copy_user_iov and bio_uncopy_user use it.

Signed-off-by: FUJITA Tomonori 
Cc: Tejun Heo 
Cc: Mike Christie 
Cc: James Bottomley 
Signed-off-by: Jens Axboe

Revert "unexport bio_{,un}map_user"

2008-03-17T20:14:40+00:00

Outside users like asmlib uses the mapping functions. API wise, the
export is definitely sane. It's a better idea to keep this export
than to require external users to open-code this piece of code instead.

Signed-off-by: Jens Axboe

fs/block_dev.c: remove #if 0'ed code

2008-02-19T09:04:00+00:00

Commit b2e895dbd80c420bfc0937c3729b4afe073b3848 #if 0'ed this code stating:

<--  snip  -->

    [PATCH] revert blockdev direct io back to 2.6.19 version

    Andrew Vasquez is reporting as-iosched oopses and a 65% throughput
    slowdown due to the recent special-casing of direct-io against
    blockdevs.  We don't know why either of these things are occurring.

    The patch minimally reverts us back to the 2.6.19 code for a 2.6.20
    release.

<--  snip  -->

It has since been dead code, and unless someone wants to revive it now
it's time to remove it.

This patch also makes bio_release_pages() static again and removes the
ki_bio_count member from struct kiocb, reverting changes that had been
done for this dead code.

Signed-off-by: Adrian Bunk 
Signed-off-by: Jens Axboe

__bio_clone: don't calculate hw/phys segment counts

2008-01-28T09:04:46+00:00

If the users sets a new ->bi_bdev on the bio after __bio_clone() has
returned it, the "segment counts valid" flag still remains even though
it may be different with the new target. So don't calculate segment
counts in __bio_clone().

Signed-off-by: Jens Axboe

bio: make freeing of ->bi_io_vec conditional in bio_free()

2007-10-16T09:03:52+00:00

The empty barrier patches do not carry data, so they have no
iovec attached.

Signed-off-by: Jens Axboe

bio: use memset() in bio_init()

2007-10-16T09:03:51+00:00

Use memset() to clear the bio, instead of doing each field manually.

Signed-off-by: Jens Axboe

Drop 'size' argument from bio_endio and bi_end_io

2007-10-10T07:25:57+00:00

As bi_end_io is only called once when the reqeust 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.

Signed-off-by: Neil Brown 
Signed-off-by: Jens Axboe