summaryrefslogtreecommitdiff
path: root/block/bounce.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2015-09-03 22:28:30 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-09-03 22:28:30 +0300
commite31fb9e00543e5d3c5b686747d3c862bc09b59f3 (patch)
tree4300b111471a858b542d55d47d587fb8ef52513a /block/bounce.c
parent824b005c86f91fe02eb2743a4526361f11786f70 (diff)
parent9181f8bf5abf4b9d59b12e878895375b84fe32ba (diff)
downloadlinux-e31fb9e00543e5d3c5b686747d3c862bc09b59f3.tar.xz
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull ext3 removal, quota & udf fixes from Jan Kara: "The biggest change in the pull is the removal of ext3 filesystem driver (~28k lines removed). Ext4 driver is a full featured replacement these days and both RH and SUSE use it for several years without issues. Also there are some workarounds in VM & block layer mainly for ext3 which we could eventually get rid of. Other larger change is addition of proper error handling for dquot_initialize(). The rest is small fixes and cleanups" [ I wasn't convinced about the ext3 removal and worried about things falling through the cracks for legacy users, but ext4 maintainers piped up and were all unanimously in favor of removal, and maintaining all legacy ext3 support inside ext4. - Linus ] * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: udf: Don't modify filesystem for read-only mounts quota: remove an unneeded condition ext4: memory leak on error in ext4_symlink() mm/Kconfig: NEED_BOUNCE_POOL: clean-up condition ext4: Improve ext4 Kconfig test block: Remove forced page bouncing under IO fs: Remove ext3 filesystem driver doc: Update doc about journalling layer jfs: Handle error from dquot_initialize() reiserfs: Handle error from dquot_initialize() ocfs2: Handle error from dquot_initialize() ext4: Handle error from dquot_initialize() ext2: Handle error from dquot_initalize() quota: Propagate error from ->acquire_dquot()
Diffstat (limited to 'block/bounce.c')
-rw-r--r--block/bounce.c31
1 files changed, 4 insertions, 27 deletions
diff --git a/block/bounce.c b/block/bounce.c
index 2c310ea007ee..0611aea1cfe9 100644
--- a/block/bounce.c
+++ b/block/bounce.c
@@ -177,26 +177,8 @@ static void bounce_end_io_read_isa(struct bio *bio)
__bounce_end_io_read(bio, isa_page_pool);
}
-#ifdef CONFIG_NEED_BOUNCE_POOL
-static int must_snapshot_stable_pages(struct request_queue *q, struct bio *bio)
-{
- if (bio_data_dir(bio) != WRITE)
- return 0;
-
- if (!bdi_cap_stable_pages_required(&q->backing_dev_info))
- return 0;
-
- return bio_flagged(bio, BIO_SNAP_STABLE);
-}
-#else
-static int must_snapshot_stable_pages(struct request_queue *q, struct bio *bio)
-{
- return 0;
-}
-#endif /* CONFIG_NEED_BOUNCE_POOL */
-
static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig,
- mempool_t *pool, int force)
+ mempool_t *pool)
{
struct bio *bio;
int rw = bio_data_dir(*bio_orig);
@@ -204,8 +186,6 @@ static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig,
struct bvec_iter iter;
unsigned i;
- if (force)
- goto bounce;
bio_for_each_segment(from, *bio_orig, iter)
if (page_to_pfn(from.bv_page) > queue_bounce_pfn(q))
goto bounce;
@@ -217,7 +197,7 @@ bounce:
bio_for_each_segment_all(to, bio, i) {
struct page *page = to->bv_page;
- if (page_to_pfn(page) <= queue_bounce_pfn(q) && !force)
+ if (page_to_pfn(page) <= queue_bounce_pfn(q))
continue;
to->bv_page = mempool_alloc(pool, q->bounce_gfp);
@@ -255,7 +235,6 @@ bounce:
void blk_queue_bounce(struct request_queue *q, struct bio **bio_orig)
{
- int must_bounce;
mempool_t *pool;
/*
@@ -264,15 +243,13 @@ void blk_queue_bounce(struct request_queue *q, struct bio **bio_orig)
if (!bio_has_data(*bio_orig))
return;
- must_bounce = must_snapshot_stable_pages(q, *bio_orig);
-
/*
* for non-isa bounce case, just check if the bounce pfn is equal
* to or bigger than the highest pfn in the system -- in that case,
* don't waste time iterating over bio segments
*/
if (!(q->bounce_gfp & GFP_DMA)) {
- if (queue_bounce_pfn(q) >= blk_max_pfn && !must_bounce)
+ if (queue_bounce_pfn(q) >= blk_max_pfn)
return;
pool = page_pool;
} else {
@@ -283,7 +260,7 @@ void blk_queue_bounce(struct request_queue *q, struct bio **bio_orig)
/*
* slow path
*/
- __blk_queue_bounce(q, bio_orig, pool, must_bounce);
+ __blk_queue_bounce(q, bio_orig, pool);
}
EXPORT_SYMBOL(blk_queue_bounce);