bpf: Remove redundant assignment to smap->map.value_size

The attr->value_size is already assigned to smap->map.value_size
in bpf_map_init_from_attr(), there is no need to do it again in
stack_map_alloc().

Signed-off-by: Yuntao Wang <[email protected]>
Signed-off-by: Daniel Borkmann <[email protected]>
Acked-by: Joanne Koong <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]

Author: ytcoode

kernel/bpf/stackmap.c

@@ -106,7 +106,6 @@ static struct bpf_map *stack_map_alloc(union bpf_attr *attr)
 		return ERR_PTR(-ENOMEM);
 
 	bpf_map_init_from_attr(&smap->map, attr);
-	smap->map.value_size = value_size;
 	smap->n_buckets = n_buckets;
 
 	err = get_callchain_buffers(sysctl_perf_event_max_stack);