From c27e8818a09bbdfe7c07c629cb2c27e1a742e156 Mon Sep 17 00:00:00 2001
From: Paul Menage <menage@google.com>
Date: Tue, 29 Apr 2008 01:00:03 -0700
Subject: [PATCH] CGroup API files: drop mem_cgroup_force_empty()
This function isn't needed - a NULL pointer in the cftype read function will
result in the same EINVAL response to userspace.
Signed-off-by: Paul Menage <menage@google.com>
Cc: "Li Zefan" <lizf@cn.fujitsu.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Paul Jackson <pj@sgi.com>
Cc: Pavel Emelyanov <xemul@openvz.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: "YAMAMOTO Takashi" <yamamoto@valinux.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
mm/memcontrol.c | 12 ------------
1 file changed, 12 deletions(-)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 496ab700e0a4..d12795cc7622 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -880,17 +880,6 @@ static ssize_t mem_force_empty_write(struct cgroup *cont,
return ret;
}
-/*
- * Note: This should be removed if cgroup supports write-only file.
- */
-static ssize_t mem_force_empty_read(struct cgroup *cont,
- struct cftype *cft,
- struct file *file, char __user *userbuf,
- size_t nbytes, loff_t *ppos)
-{
- return -EINVAL;
-}
-
static const struct mem_cgroup_stat_desc {
const char *msg;
u64 unit;
@@ -947,7 +936,6 @@ static struct cftype mem_cgroup_files[] = {
{
.name = "force_empty",
.write = mem_force_empty_write,
- .read = mem_force_empty_read,
},
{
.name = "stat",
--
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