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A simple (void) is apparently too easy and traditional to make 

Wunused-result STFU, so let's invent something a bit more verbose to
try to achieve the desired result of "ccg xnaht I really don't care if
you think I should check the return value".
This commit is contained in:
pooka 2013-07-16 21:14:42 +00:00
parent b97b6cbaca
commit c9632786bd
1 changed files with 13 additions and 3 deletions
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16
sys/rump/net/lib/libvirtif/rumpcomp_user.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: rumpcomp_user.c,v 1.9 2013/07/16 19:44:31 pooka Exp $ */
/* $NetBSD: rumpcomp_user.c,v 1.10 2013/07/16 21:14:42 pooka Exp $ */
/*
* Copyright (c) 2013 Antti Kantee. All Rights Reserved.
@ -132,9 +132,19 @@ VIFHYPER_SEND(struct virtif_user *viu,
struct iovec *iov, size_t iovlen)
{
void *cookie = rumpuser_component_unschedule();
ssize_t idontcare __attribute__((__unused__));
/* no need to check for return value; packets may be dropped */
(void)writev(viu->viu_fd, iov, iovlen);
/*
* no need to check for return value; packets may be dropped
*
* ... sorry, I spoke too soon. We need to check it because
* apparently gcc reinvented const poisoning and it's very
* hard to say "thanks, I know I'm not using the result,
* but please STFU and let's get on with something useful".
* So let's trick gcc into letting us share the compiler
* experience.
*/
idontcare = writev(viu->viu_fd, iov, iovlen);
rumpuser_component_schedule(cookie);
}