argv_split: allow argv_split to handle NULL pointer in argcp parameter gracefully

It would be nice if the argv_split library function could gracefully handle
a NULL pointer in the argcp parameter, so as to allow functions using it
that did not care about the value of argc to not have to declare a useless
variable.  This patch accomplishes that.  Tested by me, with successful
results.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Satyam Sharma <satyam@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/lib/argv_split.c b/lib/argv_split.c
index 4096ed42f490..fad6ce4f7b57 100644
--- a/lib/argv_split.c
+++ b/lib/argv_split.c
@@ -75,7 +75,9 @@ char **argv_split(gfp_t gfp, const char *str, int *argcp)
         if (argv == NULL)
                 goto out;
 
-        *argcp = argc;
+        if (argcp)
+                *argcp = argc;
+
         argvp = argv;
 
         while (*str) {