arc.c mistypes in the comments
zfs - Zettabyte File System
Duplicated 'block' word in the comment.
* "Read" the block block at the specified DVA (in bp) via the
'mutexs' instead of 'mutexes':
83 * Buffers do not have their own mutexs, rather they rely on the 84 * hash table mutexs for the bulk of their protection (i.e. most 85 * fields in the arc_buf_hdr_t are protected by these mutexs).