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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
This commit is contained in:
Tomohiro Kusumi 2018-08-14 05:33:47 +09:00 committed by Brian Behlendorf
parent 64e96969a8
commit fe8a7982ca
1 changed files with 1 additions and 1 deletions
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module/zfs/dbuf.c
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@ -1152,7 +1152,7 @@ dbuf_whichblock(const dnode_t *dn, const int64_t level, const uint64_t offset)
* 2^(level*(indblkshift - SPA_BLKPTRSHIFT)). * 2^(level*(indblkshift - SPA_BLKPTRSHIFT)).
* *
* Thus, the level n blkid is: offset / * 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 * * = offset / 2^(datablkshift + level *
* (indblkshift - SPA_BLKPTRSHIFT)) * (indblkshift - SPA_BLKPTRSHIFT))
* = offset >> (datablkshift + level * * = offset >> (datablkshift + level *