lib/parser.c: switch match_u64int() over to use match_strdup()

This simplifies the code.  No change in behavior.

Link: http://lkml.kernel.org/r/20180830194814.192880-1-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 4 deletions

diff --git a/lib/parser.c b/lib/parser.c
index 0142ef28f0eb..618c36ec8efe 100644
--- a/lib/parser.c
+++ b/lib/parser.c
@@ -166,13 +166,10 @@ static int match_u64int(substring_t *s, u64 *result, int base)
         char *buf;
         int ret;
         u64 val;
-        size_t len = s->to - s->from;
 
-        buf = kmalloc(len + 1, GFP_KERNEL);
+        buf = match_strdup(s);
         if (!buf)
                 return -ENOMEM;
-        memcpy(buf, s->from, len);
-        buf[len] = '\0';
 
         ret = kstrtoull(buf, base, &val);
         if (!ret)