[libvirt] [PATCH] network: selectively disable -Wcast-align in virNetDevParseDadStatus
Commit 0f7436ca54c9 "network: wait for DAD to finish for bridge IPv6 addresses"
results in:
CC util/libvirt_util_la-virnetdevmacvlan.lo
util/virnetdev.c: In function 'virNetDevParseDadStatus':
util/virnetdev.c:1319:188: error: cast increases required alignment of target type
[-Werror=cast-align]
util/virnetdev.c:1332:41: error: cast increases required alignment of target type
[-Werror=cast-align]
util/virnetdev.c:1334:92: error: cast increases required alignment of target type
[-Werror=cast-align]
cc1: all warnings being treated as errors
on at least ARM platforms.
The three macros involved (NLMSG_NEXT, IFA_RTA and RTA_NEXT) all appear to
correctly take care of alignment, therefore suppress Wcast-align around their
uses.
Signed-off-by: Ian Campbell <ian.campbell(a)citrix.com>
Cc: Maxim Perevedentsev <mperevedentsev(a)virtuozzo.com>
Cc: Laine Stump <laine(a)laine.org>
Cc: Dario Faggioli <dario.faggioli(a)citrix.com>
Cc: Jim Fehlig <jfehlig(a)suse.com>
---
src/util/virnetdev.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/src/util/virnetdev.c b/src/util/virnetdev.c
index ade9afa..0bc809e 100644
--- a/src/util/virnetdev.c
+++ b/src/util/virnetdev.c
@@ -1316,7 +1316,10 @@ virNetDevParseDadStatus(struct nlmsghdr *nlh, int len,
struct rtattr *rtattr_ptr;
size_t i;
struct in6_addr *addr;
+
+ VIR_WARNINGS_NO_CAST_ALIGN
for (; NLMSG_OK(nlh, len); nlh = NLMSG_NEXT(nlh, len)) {
+ VIR_WARNINGS_RESET
if (NLMSG_PAYLOAD(nlh, 0) < sizeof(struct ifaddrmsg)) {
/* Message without payload is the last one. */
break;
@@ -1329,9 +1332,11 @@ virNetDevParseDadStatus(struct nlmsghdr *nlh, int len,
}
ifaddrmsg_len = IFA_PAYLOAD(nlh);
+ VIR_WARNINGS_NO_CAST_ALIGN
rtattr_ptr = (struct rtattr *) IFA_RTA(ifaddrmsg_ptr);
for (; RTA_OK(rtattr_ptr, ifaddrmsg_len);
rtattr_ptr = RTA_NEXT(rtattr_ptr, ifaddrmsg_len)) {
+ VIR_WARNINGS_RESET
if (RTA_PAYLOAD(rtattr_ptr) != sizeof(struct in6_addr)) {
/* No address: ignore. */
continue;
--
2.1.4