[PATCH] mm/memcontrol: add tips for kmem.slabinfo

[xiongwei.song]

From: Xiongwei Song <xiongwei.song@xxxxxxxxxxxxx>

No any output from kmem.slabinfo, which is not friendly. Adding
tips for it.

Signed-off-by: Xiongwei Song <xiongwei.song@xxxxxxxxxxxxx>
---
 mm/memcontrol.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index e8ca4bdcb03c..58d3bd93890b 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -5002,10 +5002,8 @@ static ssize_t memcg_write_event_control(struct kernfs_open_file *of,
 #if defined(CONFIG_MEMCG_KMEM) && (defined(CONFIG_SLAB) || defined(CONFIG_SLUB_DEBUG))
 static int mem_cgroup_slab_show(struct seq_file *m, void *p)
 {
-	/*
-	 * Deprecated.
-	 * Please, take a look at tools/cgroup/memcg_slabinfo.py .
-	 */
+	seq_puts(m, "This file is deprecated.\n"
+		"Please use tools/cgroup/memcg_slabinfo.py, which is in kernel source.\n");
 	return 0;
 }
 #endif
-- 
2.37.3