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authorLinus Torvalds <torvalds@linux-foundation.org>2013-06-12 16:42:39 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-06-12 16:42:39 -0700
commitb2cc9c19e48bcf00f10c23fbf9f6abe43f6929d5 (patch)
treed38b1d04479c14c8a9bfdf01bc817490173dcd28 /include
parenta568fa1c91d4f0e565345119d0b942cc7f74ca3d (diff)
parentac4e97abce9b80c020e7113325f49e58b7b15e3f (diff)
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull block layer fixes from Jens Axboe: "Outside of bcache (which really isn't super big), these are all few-liners. There are a few important fixes in here: - Fix blk pm sleeping when holding the queue lock - A small collection of bcache fixes that have been done and tested since bcache was included in this merge window. - A fix for a raid5 regression introduced with the bio changes. - Two important fixes for mtip32xx, fixing an oops and potential data corruption (or hang) due to wrong bio iteration on stacked devices." * 'for-linus' of git://git.kernel.dk/linux-block: scatterlist: sg_set_buf() argument must be in linear mapping raid5: Initialize bi_vcnt pktcdvd: silence static checker warning block: remove refs to XD disks from documentation blkpm: avoid sleep when holding queue lock mtip32xx: Correctly handle bio->bi_idx != 0 conditions mtip32xx: Fix NULL pointer dereference during module unload bcache: Fix error handling in init code bcache: clarify free/available/unused space bcache: drop "select CLOSURES" bcache: Fix incompatible pointer type warning
Diffstat (limited to 'include')
-rw-r--r--include/linux/scatterlist.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/scatterlist.h b/include/linux/scatterlist.h
index 5951e3f38878..26806775b11b 100644
--- a/include/linux/scatterlist.h
+++ b/include/linux/scatterlist.h
@@ -111,6 +111,9 @@ static inline struct page *sg_page(struct scatterlist *sg)
static inline void sg_set_buf(struct scatterlist *sg, const void *buf,
unsigned int buflen)
{
+#ifdef CONFIG_DEBUG_SG
+ BUG_ON(!virt_addr_valid(buf));
+#endif
sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf));
}