From 0c19b0adb8dd33dbd10ff48e41971231c486855c Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Thu, 20 Nov 2008 04:08:29 -0800 Subject: [PATCH] netlink: avoid memset of 0 bytes sparse warning A netlink attribute padding of zero triggers this sparse warning: include/linux/netlink.h:245:8: warning: memset with byte count of 0 Avoid the memset when the size parameter is constant and requires no padding. Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- include/linux/netlink.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/linux/netlink.h b/include/linux/netlink.h index 9ff1b54908f..51b09a1f46c 100644 --- a/include/linux/netlink.h +++ b/include/linux/netlink.h @@ -242,7 +242,8 @@ __nlmsg_put(struct sk_buff *skb, u32 pid, u32 seq, int type, int len, int flags) nlh->nlmsg_flags = flags; nlh->nlmsg_pid = pid; nlh->nlmsg_seq = seq; - memset(NLMSG_DATA(nlh) + len, 0, NLMSG_ALIGN(size) - size); + if (!__builtin_constant_p(size) || NLMSG_ALIGN(size) - size != 0) + memset(NLMSG_DATA(nlh) + len, 0, NLMSG_ALIGN(size) - size); return nlh; } -- 2.41.1