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3741 zfs needs better comments
Submitted by:   Will Andrews <willa@spectralogic.com>
Submitted by:   Justin Gibbs <justing@spectralogic.com>
Submitted by:   Alan Somers <alans@spectralogic.com>
Reviewed by:    Matthew Ahrens <mahrens@delphix.com>

@@ -1026,10 +1026,11 @@
                     flags | ZIO_FLAG_DONT_PROPAGATE);
 
         zio_buf_free(ubbuf, VDEV_UBERBLOCK_SIZE(vd));
 }
 
+/* Sync the uberblocks to all vdevs in svd[] */
 int
 vdev_uberblock_sync_list(vdev_t **svd, int svdcount, uberblock_t *ub, int flags)
 {
         spa_t *spa = svd[0]->vdev_spa;
         zio_t *zio;