[Xen-changelog] [xen-unstable] [BLKTAP] No need for barrier when updating rsp_prod_pvt.

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxx
# Node ID 6f551093f0689c7c914ddfe2ad268bd15aa0ba37
# Parent  5a41ea282c86bfb3603bdd5feb9199ac8f80e86d
[BLKTAP] No need for barrier when updating rsp_prod_pvt.
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
---
 tools/blktap/drivers/tapdisk.c |    1 -
 1 files changed, 1 deletion(-)

diff -r 5a41ea282c86 -r 6f551093f068 tools/blktap/drivers/tapdisk.c
--- a/tools/blktap/drivers/tapdisk.c    Tue Nov 07 11:54:52 2006 +0000
+++ b/tools/blktap/drivers/tapdisk.c    Tue Nov 07 12:31:17 2006 +0000
@@ -381,7 +381,6 @@ static inline int write_rsp_to_ring(stru
        
        rsp_d = RING_GET_RESPONSE(&info->fe_ring, info->fe_ring.rsp_prod_pvt);
        memcpy(rsp_d, rsp, sizeof(blkif_response_t));
-       wmb();
        info->fe_ring.rsp_prod_pvt++;
        
        return 0;

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