Commit 0f0cace3 authored by Roman Gushchin's avatar Roman Gushchin Committed by Dennis Zhou
Browse files

mm, memcg: mark cgroup_memory_nosocket, nokmem and noswap as __ro_after_init 



cgroup_memory_nosocket, cgroup_memory_nokmem and cgroup_memory_noswap
are initialized during the kernel initialization and never change
their value afterwards.

cgroup_memory_nosocket, cgroup_memory_nokmem are written only from
cgroup_memory(), which is marked as __init.

cgroup_memory_noswap is written from setup_swap_account() and
mem_cgroup_swap_init(), both are marked as __init.

Mark all three variables as __ro_after_init.

Signed-off-by: default avatarRoman Gushchin <guro@fb.com>
Signed-off-by: default avatarDennis Zhou <dennis@kernel.org>
parent 8d55ba5d

mm/memcontrol.c

+3 −3
Original line number Diff line number Diff line
@@ -80,14 +80,14 @@ struct mem_cgroup *root_mem_cgroup __read_mostly; 
DEFINE_PER_CPU(struct mem_cgroup *, int_active_memcg);



/* Socket memory accounting disabled? */

static bool cgroup_memory_nosocket;

static bool cgroup_memory_nosocket __ro_after_init;



/* Kernel memory accounting disabled? */

static bool cgroup_memory_nokmem;

static bool cgroup_memory_nokmem __ro_after_init;



/* Whether the swap controller is active */

#ifdef CONFIG_MEMCG_SWAP

bool cgroup_memory_noswap __read_mostly;

bool cgroup_memory_noswap __ro_after_init;

#else

#define cgroup_memory_noswap		1

#endif