From: Haiyue Wang <haiyue.wang@intel.com>
Date: Wed, 27 Mar 2024 06:53:29 +0000 (+0800)
Subject: bpf,arena: Use helper sizeof_field in struct accessors
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=55fc888ded83ed542f3de3e51bae03936a998349;p=linux.git

bpf,arena: Use helper sizeof_field in struct accessors

Use the well defined helper sizeof_field() to calculate the size of a
struct member, instead of doing custom calculations.

Signed-off-by: Haiyue Wang <haiyue.wang@intel.com>
Link: https://lore.kernel.org/r/20240327065334.8140-1-haiyue.wang@intel.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
---

diff --git a/kernel/bpf/arena.c b/kernel/bpf/arena.c
index 343c3456c8ddf..6c81630c52934 100644
--- a/kernel/bpf/arena.c
+++ b/kernel/bpf/arena.c
@@ -37,7 +37,7 @@
  */
 
 /* number of bytes addressable by LDX/STX insn with 16-bit 'off' field */
-#define GUARD_SZ (1ull << sizeof(((struct bpf_insn *)0)->off) * 8)
+#define GUARD_SZ (1ull << sizeof_field(struct bpf_insn, off) * 8)
 #define KERN_VM_SZ (SZ_4G + GUARD_SZ)
 
 struct bpf_arena {