superrob1500
/
mirror-linux
mirror of https://github.com/torvalds/linux
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

w1: Avoid -Wflex-array-member-not-at-end warnings 

-Wflex-array-member-not-at-end was introduced in GCC-14, and we are
getting ready to enable it, globally.

Use the `DEFINE_RAW_FLEX()` helper for on-stack definitions of
a flexible structure where the size of the flexible-array member
is known at compile-time, and refactor the rest of the code,
accordingly.

So, with these changes, fix the following warnings:

drivers/w1/w1_netlink.c:198:31: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
drivers/w1/w1_netlink.c:219:31: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]

Reviewed-by: Kees Cook <kees@kernel.org>
Signed-off-by: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/Z_RflBe5iDGTMFjV@kspp
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250513105326.27385-2-krzysztof.kozlowski@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/1259/head
Gustavo A. R. Silva 2025-05-13 12:53:26 +02:00 committed by Greg Kroah-Hartman
parent b808f1cc9c
commit 3ab311289c
1 changed files with 20 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
drivers/w1/w1_netlink.c
View File

@ -194,16 +194,16 @@ static void w1_netlink_queue_status(struct w1_cb_block *block,
static void w1_netlink_send_error(struct cn_msg *cn, struct w1_netlink_msg *msg,
int portid, int error)
{
struct {
struct cn_msg cn;
struct w1_netlink_msg msg;
} packet;
memcpy(&packet.cn, cn, sizeof(packet.cn));
memcpy(&packet.msg, msg, sizeof(packet.msg));
packet.cn.len = sizeof(packet.msg);
packet.msg.len = 0;
packet.msg.status = (u8)-error;
cn_netlink_send(&packet.cn, portid, 0, GFP_KERNEL);
DEFINE_RAW_FLEX(struct cn_msg, packet, data,
sizeof(struct w1_netlink_msg));
struct w1_netlink_msg *pkt_msg = (struct w1_netlink_msg *)packet->data;
*packet = *cn;
*pkt_msg = *msg;
packet->len = sizeof(*pkt_msg);
pkt_msg->len = 0;
pkt_msg->status = (u8)-error;
cn_netlink_send(packet, portid, 0, GFP_KERNEL);
}
/**
@ -215,22 +215,20 @@ static void w1_netlink_send_error(struct cn_msg *cn, struct w1_netlink_msg *msg,
*/
void w1_netlink_send(struct w1_master *dev, struct w1_netlink_msg *msg)
{
struct {
struct cn_msg cn;
struct w1_netlink_msg msg;
} packet;
memset(&packet, 0, sizeof(packet));
DEFINE_RAW_FLEX(struct cn_msg, packet, data,
sizeof(struct w1_netlink_msg));
struct w1_netlink_msg *pkt_msg = (struct w1_netlink_msg *)packet->data;
packet.cn.id.idx = CN_W1_IDX;
packet.cn.id.val = CN_W1_VAL;
packet->id.idx = CN_W1_IDX;
packet->id.val = CN_W1_VAL;
packet.cn.seq = dev->seq++;
packet.cn.len = sizeof(*msg);
packet->seq = dev->seq++;
packet->len = sizeof(*msg);
memcpy(&packet.msg, msg, sizeof(*msg));
packet.msg.len = 0;
*pkt_msg = *msg;
pkt_msg->len = 0;
cn_netlink_send(&packet.cn, 0, 0, GFP_KERNEL);
cn_netlink_send(packet, 0, 0, GFP_KERNEL);
}
static void w1_send_slave(struct w1_master *dev, u64 rn)