rbd: use kmemdup()

This replaces two kmalloc()/memcpy() combinations with a single
call to kmemdup().

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: David Zafman <david.zafman@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index e01dbb1..d97611e 100644 (file)
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -3151,11 +3151,9 @@ static inline char *dup_token(const char **buf, size_t *lenp)
        size_t len;
 
        len = next_token(buf);
-       dup = kmalloc(len + 1, GFP_KERNEL);
+       dup = kmemdup(*buf, len + 1, GFP_KERNEL);
        if (!dup)
                return NULL;
-
-       memcpy(dup, *buf, len);
        *(dup + len) = '\0';
        *buf += len;
 
@@ -3264,10 +3262,9 @@ static int rbd_add_parse_args(const char *buf,
                ret = -ENAMETOOLONG;
                goto out_err;
        }
-       spec->snap_name = kmalloc(len + 1, GFP_KERNEL);
+       spec->snap_name = kmemdup(buf, len + 1, GFP_KERNEL);
        if (!spec->snap_name)
                goto out_mem;
-       memcpy(spec->snap_name, buf, len);
        *(spec->snap_name + len) = '\0';
 
        /* Initialize all rbd options to the defaults */