summaryrefslogtreecommitdiffstats
path: root/drivers/block
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2013-08-14 10:04:43 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-08-14 10:04:43 -0700
commitf1d6e17f540af37bb1891480143669ba7636c4cf (patch)
tree962d95f43fe425c9a7d4c7f1316c76000bcec370 /drivers/block
parent28fbc8b6a29c849a3f03a6b05010d4b584055665 (diff)
parent8c8296223f3abb142be8fc31711b18a704c0e7d8 (diff)
downloadblackbird-op-linux-f1d6e17f540af37bb1891480143669ba7636c4cf.tar.gz
blackbird-op-linux-f1d6e17f540af37bb1891480143669ba7636c4cf.zip
Merge branch 'akpm' (patches from Andrew Morton)
Merge a bunch of fixes from Andrew Morton. * emailed patches from Andrew Morton <akpm@linux-foundation.org>: fs/proc/task_mmu.c: fix buffer overflow in add_page_map() arch: *: Kconfig: add "kernel/Kconfig.freezer" to "arch/*/Kconfig" ocfs2: fix null pointer dereference in ocfs2_dir_foreach_blk_id() x86 get_unmapped_area(): use proper mmap base for bottom-up direction ocfs2: fix NULL pointer dereference in ocfs2_duplicate_clusters_by_page ocfs2: Revert 40bd62e to avoid regression in extended allocation drivers/rtc/rtc-stmp3xxx.c: provide timeout for potentially endless loop polling a HW bit hugetlb: fix lockdep splat caused by pmd sharing aoe: adjust ref of head for compound page tails microblaze: fix clone syscall mm: save soft-dirty bits on file pages mm: save soft-dirty bits on swapped pages memcg: don't initialize kmem-cache destroying work for root caches
Diffstat (limited to 'drivers/block')
-rw-r--r--drivers/block/aoe/aoecmd.c17
1 files changed, 7 insertions, 10 deletions
diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c
index 99cb944a002d..4d45dba7fb8f 100644
--- a/drivers/block/aoe/aoecmd.c
+++ b/drivers/block/aoe/aoecmd.c
@@ -906,16 +906,10 @@ bio_pageinc(struct bio *bio)
int i;
bio_for_each_segment(bv, bio, i) {
- page = bv->bv_page;
/* Non-zero page count for non-head members of
- * compound pages is no longer allowed by the kernel,
- * but this has never been seen here.
+ * compound pages is no longer allowed by the kernel.
*/
- if (unlikely(PageCompound(page)))
- if (compound_trans_head(page) != page) {
- pr_crit("page tail used for block I/O\n");
- BUG();
- }
+ page = compound_trans_head(bv->bv_page);
atomic_inc(&page->_count);
}
}
@@ -924,10 +918,13 @@ static void
bio_pagedec(struct bio *bio)
{
struct bio_vec *bv;
+ struct page *page;
int i;
- bio_for_each_segment(bv, bio, i)
- atomic_dec(&bv->bv_page->_count);
+ bio_for_each_segment(bv, bio, i) {
+ page = compound_trans_head(bv->bv_page);
+ atomic_dec(&page->_count);
+ }
}
static void
OpenPOWER on IntegriCloud