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Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block

Browse source 
Pull core block IO changes from Jens Axboe:
 "The major piece in here is the immutable bio_ve series from Kent, the
  rest is fairly minor.  It was supposed to go in last round, but
  various issues pushed it to this release instead.  The pull request
  contains:

   - Various smaller blk-mq fixes from different folks.  Nothing major
     here, just minor fixes and cleanups.

   - Fix for a memory leak in the error path in the block ioctl code
     from Christian Engelmayer.

   - Header export fix from CaiZhiyong.

   - Finally the immutable biovec changes from Kent Overstreet.  This
     enables some nice future work on making arbitrarily sized bios
     possible, and splitting more efficient.  Related fixes to immutable
     bio_vecs:

        - dm-cache immutable fixup from Mike Snitzer.
        - btrfs immutable fixup from Muthu Kumar.

  - bio-integrity fix from Nic Bellinger, which is also going to stable"

* 'for-3.14/core' of git://git.kernel.dk/linux-block: (44 commits)
  xtensa: fixup simdisk driver to work with immutable bio_vecs
  block/blk-mq-cpu.c: use hotcpu_notifier()
  blk-mq: for_each_* macro correctness
  block: Fix memory leak in rw_copy_check_uvector() handling
  bio-integrity: Fix bio_integrity_verify segment start bug
  block: remove unrelated header files and export symbol
  blk-mq: uses page->list incorrectly
  blk-mq: use __smp_call_function_single directly
  btrfs: fix missing increment of bi_remaining
  Revert "block: Warn and free bio if bi_end_io is not set"
  block: Warn and free bio if bi_end_io is not set
  blk-mq: fix initializing request's start time
  block: blk-mq: don't export blk_mq_free_queue()
  block: blk-mq: make blk_sync_queue support mq
  block: blk-mq: support draining mq queue
  dm cache: increment bi_remaining when bi_end_io is restored
  block: fixup for generic bio chaining
  block: Really silence spurious compiler warnings
  block: Silence spurious compiler warnings
  block: Kill bio_pair_split()
  ...
This commit is contained in:
Linus Torvalds 2014-01-30 11:19:05 -08:00
commit f568849eda
139 changed files with 2144 additions and 2683 deletions
Download patch file Download diff file Expand all files Collapse all files

40
mm/bounce.c
View file

@ -98,27 +98,24 @@ int init_emergency_isa_pool(void)
static void copy_to_high_bio_irq(struct bio *to, struct bio *from)
{
unsigned char *vfrom;
struct bio_vec *tovec, *fromvec;
int i;
struct bio_vec tovec, *fromvec = from->bi_io_vec;
struct bvec_iter iter;
bio_for_each_segment(tovec, to, i) {
fromvec = from->bi_io_vec + i;
bio_for_each_segment(tovec, to, iter) {
if (tovec.bv_page != fromvec->bv_page) {
/*
* fromvec->bv_offset and fromvec->bv_len might have
* been modified by the block layer, so use the original
* copy, bounce_copy_vec already uses tovec->bv_len
*/
vfrom = page_address(fromvec->bv_page) +
tovec.bv_offset;
/*
* not bounced
*/
if (tovec->bv_page == fromvec->bv_page)
continue;
bounce_copy_vec(&tovec, vfrom);
flush_dcache_page(tovec.bv_page);
}
/*
* fromvec->bv_offset and fromvec->bv_len might have been
* modified by the block layer, so use the original copy,
* bounce_copy_vec already uses tovec->bv_len
*/
vfrom = page_address(fromvec->bv_page) + tovec->bv_offset;
bounce_copy_vec(tovec, vfrom);
flush_dcache_page(tovec->bv_page);
fromvec++;
}
}
@ -201,13 +198,14 @@ static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig,
{
struct bio *bio;
int rw = bio_data_dir(*bio_orig);
struct bio_vec *to, *from;
struct bio_vec *to, from;
struct bvec_iter iter;
unsigned i;
if (force)
goto bounce;
bio_for_each_segment(from, *bio_orig, i)
if (page_to_pfn(from->bv_page) > queue_bounce_pfn(q))
bio_for_each_segment(from, *bio_orig, iter)
if (page_to_pfn(from.bv_page) > queue_bounce_pfn(q))
goto bounce;
return;

10
mm/page_io.c
View file

@ -31,13 +31,13 @@ static struct bio *get_swap_bio(gfp_t gfp_flags,
bio = bio_alloc(gfp_flags, 1);
if (bio) {
bio->bi_sector = map_swap_page(page, &bio->bi_bdev);
bio->bi_sector <<= PAGE_SHIFT - 9;
bio->bi_iter.bi_sector = map_swap_page(page, &bio->bi_bdev);
bio->bi_iter.bi_sector <<= PAGE_SHIFT - 9;
bio->bi_io_vec[0].bv_page = page;
bio->bi_io_vec[0].bv_len = PAGE_SIZE;
bio->bi_io_vec[0].bv_offset = 0;
bio->bi_vcnt = 1;
bio->bi_size = PAGE_SIZE;
bio->bi_iter.bi_size = PAGE_SIZE;
bio->bi_end_io = end_io;
}
return bio;
@ -62,7 +62,7 @@ void end_swap_bio_write(struct bio *bio, int err)
printk(KERN_ALERT "Write-error on swap-device (%u:%u:%Lu)\n",
imajor(bio->bi_bdev->bd_inode),
iminor(bio->bi_bdev->bd_inode),
(unsigned long long)bio->bi_sector);
(unsigned long long)bio->bi_iter.bi_sector);
ClearPageReclaim(page);
}
end_page_writeback(page);
@ -80,7 +80,7 @@ void end_swap_bio_read(struct bio *bio, int err)
printk(KERN_ALERT "Read-error on swap-device (%u:%u:%Lu)\n",
imajor(bio->bi_bdev->bd_inode),
iminor(bio->bi_bdev->bd_inode),
(unsigned long long)bio->bi_sector);
(unsigned long long)bio->bi_iter.bi_sector);
goto out;
}