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>
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@ -880,17 +880,6 @@ static ssize_t mem_force_empty_write(struct cgroup *cont,
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return ret;
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return ret;
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}
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}
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/*
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* Note: This should be removed if cgroup supports write-only file.
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*/
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static ssize_t mem_force_empty_read(struct cgroup *cont,
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struct cftype *cft,
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struct file *file, char __user *userbuf,
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size_t nbytes, loff_t *ppos)
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{
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return -EINVAL;
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}
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static const struct mem_cgroup_stat_desc {
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static const struct mem_cgroup_stat_desc {
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const char *msg;
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const char *msg;
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u64 unit;
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u64 unit;
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@ -947,7 +936,6 @@ static struct cftype mem_cgroup_files[] = {
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{
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{
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.name = "force_empty",
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.name = "force_empty",
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.write = mem_force_empty_write,
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.write = mem_force_empty_write,
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.read = mem_force_empty_read,
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},
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},
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{
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{
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.name = "stat",
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.name = "stat",
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