nfsd: convert nfs4_alloc_stid() to use idr_alloc_cyclic()

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Acked-by: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 2e27430..417c848 100644 (file)
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -234,7 +234,6 @@ static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct
 kmem_cache *slab)
 {
        struct idr *stateids = &cl->cl_stateids;
-       static int min_stateid = 0;
        struct nfs4_stid *stid;
        int new_id;
 
@@ -242,7 +241,7 @@ kmem_cache *slab)
        if (!stid)
                return NULL;
 
-       new_id = idr_alloc(stateids, stid, min_stateid, 0, GFP_KERNEL);
+       new_id = idr_alloc_cyclic(stateids, stid, 0, 0, GFP_KERNEL);
        if (new_id < 0)
                goto out_free;
        stid->sc_client = cl;
@@ -261,10 +260,6 @@ kmem_cache *slab)
         * amount of time until an id is reused, by ensuring they always
         * "increase" (mod INT_MAX):
         */
-
-       min_stateid = new_id+1;
-       if (min_stateid == INT_MAX)
-               min_stateid = 0;
        return stid;
 out_free:
        kfree(stid);