MAINTAINERS: BCACHE: Kent Overstreet has changed email address

Kent's email address in MAINTAINERS seems to be invalid.
This was his last sign-off address, so use that if appropriate.

Fix the S: status entry while there.
Signed-off-by: NJoe Perches <joe@perches.com>
Acked-by: NKent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

MAINTAINERS

@@ -2026,10 +2026,10 @@ S:	Maintained
 F:	drivers/net/hamradio/baycom*
 
 BCACHE (BLOCK LAYER CACHE)
-M:	Kent Overstreet <kmo@daterainc.com>
+M:	Kent Overstreet <kent.overstreet@gmail.com>
 L:	linux-bcache@vger.kernel.org
 W:	http://bcache.evilpiepirate.org
-S:	Maintained:
+S:	Maintained
 F:	drivers/md/bcache/
 
 BDISP ST MEDIA DRIVER

drivers/md/bcache/journal.c

@@ -157,7 +157,7 @@ int bch_journal_read(struct cache_set *c, struct list_head *list)
 
 	for_each_cache(ca, c, iter) {
 		struct journal_device *ja = &ca->journal;
-		unsigned long bitmap[SB_JOURNAL_BUCKETS / BITS_PER_LONG];
+		DECLARE_BITMAP(bitmap, SB_JOURNAL_BUCKETS);
 		unsigned i, l, r, m;
 		uint64_t seq;