refill_sheaf
if (refill_sheaf(s, sheaf, gfp | __GFP_NOMEMALLOC | __GFP_NOWARN)) {
if (!refill_sheaf(s, empty, gfp | __GFP_NOMEMALLOC | __GFP_NOWARN)) {
ret = refill_sheaf(s, sheaf, gfp_nomemalloc);
ret = refill_sheaf(s, sheaf, gfp);
refill_sheaf(s, sheaf, gfp)) {