[PATCH -next 2/2] bpf: use memset_range helper in __mark_reg_known

[Xiu Jianfeng]

Replace the open-coded memset with memset_range helper to simplify
the code, there is no functional change in this patch.

Signed-off-by: Xiu Jianfeng <xiujianfeng@xxxxxxxxxx>
---
 kernel/bpf/verifier.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 7a20e12f2e45..317f259c0103 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -1099,9 +1099,8 @@ static void ___mark_reg_known(struct bpf_reg_state *reg, u64 imm)
  */
 static void __mark_reg_known(struct bpf_reg_state *reg, u64 imm)
 {
-	/* Clear id, off, and union(map_ptr, range) */
-	memset(((u8 *)reg) + sizeof(reg->type), 0,
-	       offsetof(struct bpf_reg_state, var_off) - sizeof(reg->type));
+	/* Clear off, union(map_ptr, range), id, and ref_obj_id */
+	memset_range(reg, 0, off, ref_obj_id);
 	___mark_reg_known(reg, imm);
 }
 
-- 
2.17.1