kernel/cgroup.c: kfree(NULL) is legal

Reduces object file size a bit:

Before:
$ size kernel/cgroup.o
   text    data     bss     dec     hex filename
  21593    7804    4924   34321    8611 kernel/cgroup.o
After:
$ size kernel/cgroup.o
   text    data     bss     dec     hex filename
  21537    7744    4924   34205    859d kernel/cgroup.o

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Cc: Paul Menage <menage@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 6 deletions

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index fc5e4a48582f..9a6c2bfa1d9f 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -923,8 +923,7 @@ static int cgroup_remount(struct super_block *sb, int *flags, char *data)
         if (opts.release_agent)
                 strcpy(root->release_agent_path, opts.release_agent);
  out_unlock:
-        if (opts.release_agent)
-                kfree(opts.release_agent);
+        kfree(opts.release_agent);
         mutex_unlock(&cgroup_mutex);
         mutex_unlock(&cgrp->dentry->d_inode->i_mutex);
         return ret;
@@ -1027,15 +1026,13 @@ static int cgroup_get_sb(struct file_system_type *fs_type,
         /* First find the desired set of subsystems */
         ret = parse_cgroupfs_options(data, &opts);
         if (ret) {
-                if (opts.release_agent)
-                        kfree(opts.release_agent);
+                kfree(opts.release_agent);
                 return ret;
         }
 
         root = kzalloc(sizeof(*root), GFP_KERNEL);
         if (!root) {
-                if (opts.release_agent)
-                        kfree(opts.release_agent);
+                kfree(opts.release_agent);
                 return -ENOMEM;
         }