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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>
This commit is contained in:
Trond Myklebust 2010-05-13 12:51:03 -04:00
parent 93870d76fe
commit d300a41ef1
1 changed files with 2 additions and 0 deletions
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2
net/sunrpc/auth.c
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@ -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);