Fix comment on calculating blkid

Fix comment on calculating blkid at level n within dnode's blkptrs.
"(2^(level*(indblkshift - SPA_BLKPTRSHIFT)" is part of divisor
in this division.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tomohiro Kusumi <kusumi.tomohiro@osnexus.com>
Closes #7768

diff --git a/module/zfs/dbuf.c b/module/zfs/dbuf.c
index 2724f3aa2af0c90c7dd48d17932ab9e5de189465..f0bee6c2bb59ad8d950dbd0097f41d01f7935a30 100644 (file)
--- a/module/zfs/dbuf.c
+++ b/module/zfs/dbuf.c
@@ -1152,7 +1152,7 @@ dbuf_whichblock(const dnode_t *dn, const int64_t level, const uint64_t offset)
                 * 2^(level*(indblkshift - SPA_BLKPTRSHIFT)).
                 *
                 * Thus, the level n blkid is: offset /
-                * ((2^datablkshift)*(2^(level*(indblkshift - SPA_BLKPTRSHIFT)))
+                * ((2^datablkshift)*(2^(level*(indblkshift-SPA_BLKPTRSHIFT))))
                 * = offset / 2^(datablkshift + level *
                 *   (indblkshift - SPA_BLKPTRSHIFT))
                 * = offset >> (datablkshift + level *