From 79e1119b7e0099c6c9379ca3129ffb7aa2a1c249 Mon Sep 17 00:00:00 2001
From: Qi Zheng <zhengqi.arch@bytedance.com>
Date: Wed, 31 Aug 2022 11:19:47 +0800
Subject: [PATCH] ksm: remove redundant declarations in ksm.h

Currently, for struct stable_node, no one uses it in both the
include/linux/ksm.h file and the file that contains it.  For struct
mem_cgroup, it's also not used in ksm.h.  So they're all redundant, just
remove them.

Link: https://lkml.kernel.org/r/20220831031951.43152-4-zhengqi.arch@bytedance.com
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Yang Shi <shy828301@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
 include/linux/ksm.h | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/include/linux/ksm.h b/include/linux/ksm.h
index 0b4f17418f64..7e232ba59b86 100644
--- a/include/linux/ksm.h
+++ b/include/linux/ksm.h
@@ -15,9 +15,6 @@
 #include <linux/sched.h>
 #include <linux/sched/coredump.h>
 
-struct stable_node;
-struct mem_cgroup;
-
 #ifdef CONFIG_KSM
 int ksm_madvise(struct vm_area_struct *vma, unsigned long start,
 		unsigned long end, int advice, unsigned long *vm_flags);
-- 
2.50.1