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From: Jan Beich <jbeich@FreeBSD.org>
To: Hans Petter Selasky <hselasky@FreeBSD.org>
Cc: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-head@freebsd.org
Subject: Re: svn commit: r329371 - head/sys/compat/linuxkpi/common/include/asm
References: <201802161520.w1GFKLiA049085@repo.freebsd.org>
Date: Sat, 17 Feb 2018 01:42:15 +0100
In-Reply-To: <201802161520.w1GFKLiA049085@repo.freebsd.org> (Hans Petter
 Selasky's message of "Fri, 16 Feb 2018 15:20:21 +0000 (UTC)")
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Hans Petter Selasky <hselasky@FreeBSD.org> writes:

> Author: hselasky
> Date: Fri Feb 16 15:20:21 2018
> New Revision: 329371
> URL: https://svnweb.freebsd.org/changeset/base/329371
>
> Log:
>   Allow the cmpxchg() macro in the LinuxKPI to work on pointers without
>   generating compiler warnings, -Wint-conversion .
[...]

To generate errors instead ?

$ make clean all -C /usr/ports/graphics/drm-next-kmod
[...]
drm_lock.c:72:10: error: flexible array member 'u8' in a union is not allowed
                prev = cmpxchg(lock, old, new);
                       ^
/usr/src/sys/compat/linuxkpi/common/include/asm/atomic.h:165:6: note: expanded from macro 'cmpxchg'
                u8 u8[];                                                \
                   ^
drm_lock.c:72:10: error: flexible array member 'u16' in a union is not allowed
/usr/src/sys/compat/linuxkpi/common/include/asm/atomic.h:166:7: note: expanded from macro 'cmpxchg'
                u16 u16[];                                              \
                    ^
drm_lock.c:72:10: error: flexible array member 'u32' in a union is not allowed
/usr/src/sys/compat/linuxkpi/common/include/asm/atomic.h:167:7: note: expanded from macro 'cmpxchg'
                u32 u32[];                                              \
                    ^
drm_lock.c:72:10: error: flexible array member 'u64' in a union is not allowed
/usr/src/sys/compat/linuxkpi/common/include/asm/atomic.h:168:7: note: expanded from macro 'cmpxchg'
                u64 u64[];                                              \
                    ^