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authorTrond Myklebust <Trond.Myklebust@netapp.com>2010-05-13 12:51:03 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2010-05-14 15:09:34 -0400
commitd300a41ef1c39cc5e6b90fd8834ea7ab16b5c48f (patch)
tree2d439ac7e0a95329daf686ea27ba0cea35acb301 /net/sunrpc
parent93870d76fee22e887aa6e7e1fc904dbeca976928 (diff)
downloadop-kernel-dev-d300a41ef1c39cc5e6b90fd8834ea7ab16b5c48f.zip
op-kernel-dev-d300a41ef1c39cc5e6b90fd8834ea7ab16b5c48f.tar.gz
SUNRPC: Dont run rpcauth_cache_shrinker() when gfp_mask is GFP_NOFS
Under some circumstances, put_rpccred() can end up allocating memory, so check the gfp_mask to prevent deadlocks. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net/sunrpc')
-rw-r--r--net/sunrpc/auth.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/sunrpc/auth.c b/net/sunrpc/auth.c
index 95afe79..0667a36 100644
--- a/net/sunrpc/auth.c
+++ b/net/sunrpc/auth.c
@@ -270,6 +270,8 @@ rpcauth_cache_shrinker(int nr_to_scan, gfp_t gfp_mask)
LIST_HEAD(free);
int res;
+ if ((gfp_mask & GFP_KERNEL) != GFP_KERNEL)
+ return (nr_to_scan == 0) ? 0 : -1;
if (list_empty(&cred_unused))
return 0;
spin_lock(&rpc_credcache_lock);
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