linux-kernel - Re: [PATCH] fuse: use kernel headers when __KERNEL_

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Message-ID: <CAJfpegtJW+k6gLZ+jxJKp3Zj0UhCst3WD7N_xrybD59_0o7h5Q@mail.gmail.com>
Date:	Tue, 16 Apr 2013 16:21:28 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	Colin Cross <ccross@...roid.com>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"open list:FUSE: FILESYSTEM..." <fuse-devel@...ts.sourceforge.net>,
	Arve Hjønnevåg <arve@...roid.com>
Subject: Re: [PATCH] fuse: use kernel headers when __KERNEL__ is set

On Mon, Apr 15, 2013 at 11:47 PM, Colin Cross <ccross@...roid.com> wrote:
> On Mon, Apr 15, 2013 at 1:41 PM, Colin Cross <ccross@...roid.com> wrote:
>> Commit 7e98d53086d18c877cb44e9065219335184024de (Synchronize fuse
>> header with one used in library) added #ifdef __linux__ around
>> defines if it is not set.  The kernel build is self-contained and
>> can be built on non-Linux toolchains.  After the mentioned commit
>> builds on non-Linux toolchains will try to include stdint.h and
>> fail due to -nostdinc, and then fail with a bunch of undefined
>> type errors.
>>
>> Change the #ifdef to check for __linux__ or __KERNEL__ so that
>> it uses the kernel typedefs if __KERNEL__ is set.
>>
>> Signed-off-by: Colin Cross <ccross@...roid.com>
>> ---
>> I think this should go in v3.9, without it bare-metal toolchains
>> that don't define __linux__ will fail to compile the kernel, and
>> cross-compiles from non-linux hosts will probably also fail.
>
> Miklos, I see Arve sent an equivalent patch to you a month ago
> (https://lkml.org/lkml/2013/3/11/620), and I agree with his response
> to your question (checking for __linux__ and __KERNEL__ is better than
> just checking for __KERNEL__ if you want this header to be used in
> userspace builds on linux targets).

And I still disagree.  Why should userspace use the linux internal
header when there's a perfectly good standard header that it can use?

Patch committed and pushed to for-next and for-linus.  I'll push to
Linus tomorrow.

Thanks,
Miklos
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