CGroup API files: strip all trailing whitespace in cgroup_write_u64

This removes the need for people to remember to pass the -n flag to echo when
writing values to cgroup control files.

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>

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 0bd79a81666ac9aad3683bf1e24b70218eaa1b2a..57afdde871ac2d2fc30490c4b0aacbc2eac28d57 100644 (file)
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1329,10 +1329,7 @@ static ssize_t cgroup_write_u64(struct cgroup *cgrp, struct cftype *cft,
                return -EFAULT;
 
        buffer[nbytes] = 0;     /* nul-terminate */
-
-       /* strip newline if necessary */
-       if (nbytes && (buffer[nbytes-1] == '\n'))
-               buffer[nbytes-1] = 0;
+       strstrip(buffer);
        val = simple_strtoull(buffer, &end, 0);
        if (*end)
                return -EINVAL;