nfsd4: remove nfs4_acl_new

This is a not-that-useful kmalloc wrapper.  And I'd like one of the
callers to actually use something other than kmalloc.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

fs/nfsd/acl.h

@@ -47,7 +47,7 @@ struct svc_rqst;
 #define NFS4_ACL_MAX ((PAGE_SIZE - sizeof(struct nfs4_acl)) \
 			/ sizeof(struct nfs4_ace))
 
-struct nfs4_acl *nfs4_acl_new(int);
+int nfs4_acl_bytes(int entries);
 int nfs4_acl_get_whotype(char *, u32);
 __be32 nfs4_acl_write_who(struct xdr_stream *xdr, int who);
 

fs/nfsd/nfs4acl.c

@@ -161,11 +161,12 @@ nfsd4_get_nfs4_acl(struct svc_rqst *rqstp, struct dentry *dentry,
 			size += 2 * dpacl->a_count;
 	}
 
-	*acl = nfs4_acl_new(size);
+	*acl = kmalloc(nfs4_acl_bytes(size), GFP_KERNEL);
 	if (*acl == NULL) {
 		error = -ENOMEM;
 		goto out;
 	}
+	(*acl)->naces = 0;
 
 	_posix_to_nfsv4_one(pacl, *acl, flags & ~NFS4_ACL_TYPE_DEFAULT);
 
@@ -872,16 +873,13 @@ ace2type(struct nfs4_ace *ace)
 	return -1;
 }
 
-struct nfs4_acl *
-nfs4_acl_new(int n)
+/*
+ * return the size of the struct nfs4_acl required to represent an acl
+ * with @entries entries.
+ */
+int nfs4_acl_bytes(int entries)
 {
-	struct nfs4_acl *acl;
-
-	acl = kmalloc(sizeof(*acl) + n*sizeof(struct nfs4_ace), GFP_KERNEL);
-	if (acl == NULL)
-		return NULL;
-	acl->naces = 0;
-	return acl;
+	return sizeof(struct nfs4_acl) + entries * sizeof(struct nfs4_ace);
 }
 
 static struct {

fs/nfsd/nfs4xdr.c

@@ -309,7 +309,7 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
 		if (nace > NFS4_ACL_MAX)
 			return nfserr_fbig;
 
-		*acl = nfs4_acl_new(nace);
+		*acl = kmalloc(nfs4_acl_bytes(nace), GFP_KERNEL);
 		if (*acl == NULL)
 			return nfserr_jukebox;