diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-30 11:19:05 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-30 11:19:05 -0800 |
commit | f568849edac8611d603e00bd6cbbcfea09395ae6 (patch) | |
tree | b9472d640fe5d87426d38c9d81d946cf197ad3fb /mm/bounce.c | |
parent | d9894c228b11273e720bb63ba120d1d326fe9d94 (diff) | |
parent | 675675ada486dde5bf9aa51665e90706bff11a35 (diff) |
Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block
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()
...
Diffstat (limited to 'mm/bounce.c')
-rw-r--r-- | mm/bounce.c | 44 |
1 files changed, 21 insertions, 23 deletions
diff --git a/mm/bounce.c b/mm/bounce.c index 5a7d58fb883..523918b8c6d 100644 --- a/mm/bounce.c +++ b/mm/bounce.c @@ -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; - - bio_for_each_segment(tovec, to, i) { - fromvec = from->bi_io_vec + i; - - /* - * not bounced - */ - if (tovec->bv_page == fromvec->bv_page) - continue; - - /* - * 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; + struct bio_vec tovec, *fromvec = from->bi_io_vec; + struct bvec_iter iter; + + 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; + + bounce_copy_vec(&tovec, vfrom); + flush_dcache_page(tovec.bv_page); + } - 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; |