[bpf-next,v3,02/13] bpf: Introduce new helper bpf_map_put_memcg()

Commit Message

Yafang Shao Sept. 2, 2022, 2:29 a.m. UTC

Replace the open-coded mem_cgroup_put() with a new helper
bpf_map_put_memcg(). That could make it more clear.

Signed-off-by: Yafang Shao <[e-mail]>
---
 kernel/bpf/syscall.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

Patch

diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 4e9d462..7ce024c 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -441,6 +441,11 @@  static struct mem_cgroup *bpf_map_get_memcg(const struct bpf_map *map)
 	return root_mem_cgroup;
 }
 
+static void bpf_map_put_memcg(struct mem_cgroup *memcg)
+{
+	mem_cgroup_put(memcg);
+}
+
 void *bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags,
 			   int node)
 {
@@ -451,7 +456,7 @@  void *bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags,
 	old_memcg = set_active_memcg(memcg);
 	ptr = kmalloc_node(size, flags | __GFP_ACCOUNT, node);
 	set_active_memcg(old_memcg);
-	mem_cgroup_put(memcg);
+	bpf_map_put_memcg(memcg);
 
 	return ptr;
 }
@@ -465,7 +470,7 @@  void *bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags)
 	old_memcg = set_active_memcg(memcg);
 	ptr = kzalloc(size, flags | __GFP_ACCOUNT);
 	set_active_memcg(old_memcg);
-	mem_cgroup_put(memcg);
+	bpf_map_put_memcg(memcg);
 
 	return ptr;
 }
@@ -480,7 +485,7 @@  void __percpu *bpf_map_alloc_percpu(const struct bpf_map *map, size_t size,
 	old_memcg = set_active_memcg(memcg);
 	ptr = __alloc_percpu_gfp(size, align, flags | __GFP_ACCOUNT);
 	set_active_memcg(old_memcg);
-	mem_cgroup_put(memcg);
+	bpf_map_put_memcg(memcg);
 
 	return ptr;
 }