From: benno <benno@FreeBSD.org>
Date: Mon, 16 Mar 2015 20:00:09 +0000 (+0000)
Subject: Reset bp->bio_done to unmapped_buf when removing a transient map in biodone.
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=05fdbce0f6097f8b69be407751438159006c7ca2;p=people%2Fjulieng%2Ffreebsd.git

Reset bp->bio_done to unmapped_buf when removing a transient map in biodone.

Submitted by:	Scott Ferris <scott.ferris@isilon.com>
Sponsored by:	EMC / Isilon Storage Division
Reviewed by:	kib
---

diff --git a/sys/kern/vfs_bio.c b/sys/kern/vfs_bio.c
index f885884506ac..dfe2997bb400 100644
--- a/sys/kern/vfs_bio.c
+++ b/sys/kern/vfs_bio.c
@@ -3611,6 +3611,7 @@ biodone(struct bio *bp)
 		bp->bio_flags |= BIO_UNMAPPED;
 		start = trunc_page((vm_offset_t)bp->bio_data);
 		end = round_page((vm_offset_t)bp->bio_data + bp->bio_length);
+		bp->bio_data = unmapped_buf;
 		pmap_qremove(start, OFF_TO_IDX(end - start));
 		vmem_free(transient_arena, start, end - start);
 		atomic_add_int(&inflight_transient_maps, -1);