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authorHeiko Carstens <heiko.carstens@de.ibm.com>2007-08-10 15:50:30 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-08-13 22:52:15 -0700
commitcae7ca3d3de48851e929de9469397749638df779 (patch)
tree2919ea031c5dcc43668f080faa3a463ac04cfed6
parent7f353bf29e162459f2f1e2ca25e41011fae65241 (diff)
[IPVS]: Use IP_VS_WAIT_WHILE when encessary.
For architectures that don't have a volatile atomic_ts constructs like while (atomic_read(&something)); might result in endless loops since a barrier() is missing which forces the compiler to generate code that actually reads memory contents. Fix this in ipvs by using the IP_VS_WAIT_WHILE macro which resolves to while (expr) { cpu_relax(); } (why isn't this open coded btw?) Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Simon Horman <horms@verge.net.au> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv4/ipvs/ip_vs_ctl.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/ipvs/ip_vs_ctl.c b/net/ipv4/ipvs/ip_vs_ctl.c
index c32781d0ead..902fd578aa3 100644
--- a/net/ipv4/ipvs/ip_vs_ctl.c
+++ b/net/ipv4/ipvs/ip_vs_ctl.c
@@ -908,7 +908,7 @@ ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user *udest)
write_lock_bh(&__ip_vs_svc_lock);
/* Wait until all other svc users go away */
- while (atomic_read(&svc->usecnt) > 1) {};
+ IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
/* call the update_service, because server weight may be changed */
svc->scheduler->update_service(svc);