palinfo fixes
authorAl Viro <viro@zeniv.linux.org.uk>
Mon, 1 Apr 2013 02:34:37 +0000 (22:34 -0400)
committerAl Viro <viro@zeniv.linux.org.uk>
Tue, 9 Apr 2013 18:09:44 +0000 (14:09 -0400)
* check for proc_mkdir() failures
* fix buffer overrun - sizeof(format string) is *not* enough to
hold sprintf() result.
* use proc_remove_subtree(); life's much easier with it

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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