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| author | Andrew Morton <akpm@linux-foundation.org> | 2012-07-30 14:42:17 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-30 17:25:20 -0700 |
| commit | 79c743dd1e8de61c31f484c0a1b48930543044b3 (patch) | |
| tree | ba52350fdd587f56182e9d92f94c37f0519c79a2 /kernel | |
| parent | deb8274a0cf44827ec260330cc1d94d0f3dcfb94 (diff) | |
| download | lwn-79c743dd1e8de61c31f484c0a1b48930543044b3.tar.gz lwn-79c743dd1e8de61c31f484c0a1b48930543044b3.zip | |
kernel/kmod.c: document call_usermodehelper_fns() a bit
This function's interface is, uh, subtle. Attempt to apologise for it.
Cc: WANG Cong <xiyou.wangcong@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Serge Hallyn <serge.hallyn@canonical.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/kmod.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/kmod.c b/kernel/kmod.c index ff2c7cb86d77..2a8351516a0e 100644 --- a/kernel/kmod.c +++ b/kernel/kmod.c @@ -577,6 +577,12 @@ unlock: return retval; } +/* + * call_usermodehelper_fns() will not run the caller-provided cleanup function + * if a memory allocation failure is experienced. So the caller might need to + * check the call_usermodehelper_fns() return value: if it is -ENOMEM, perform + * the necessaary cleanup within the caller. + */ int call_usermodehelper_fns( char *path, char **argv, char **envp, int wait, int (*init)(struct subprocess_info *info, struct cred *new), |