linux-kernel - Re: [PATCH] RFC: fs to be compiled with -Dlinux

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Date:	Fri, 28 Oct 2011 15:50:04 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, Russell King <linux@....linux.org.uk>
Subject: Re: [PATCH] RFC: fs to be compiled with -Dlinux

On Fri, Oct 28, 2011 at 3:05 PM, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:

> So you need to add it to some CFLAGS at your own build infrastructure,
> not in fs/Makefile.

Sure, fixing. I don't have much of an infrastructure, mainly using a
simple makefile so it's a simple thing to fix up.

> That said, we *probably* should also look at making anything that the
> kernel build uses replace something like
>
>  #ifdef linux  (or __linux__)
>
> with
>
>  #if defined(linux) || defined(__KERNEL__)
>
> so that we can always rely on just the normal __KERNEL__ define rather
> than depending on the compiler being properly set up for
> cross-compiling for Linux.

Something like this?

>From 929a7556d27f752466477e2e834e02fb4bd9922e Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@...ricsson.com>
Date: Fri, 28 Oct 2011 15:43:22 +0200
Subject: [PATCH] aout: depend on linux or __KERNEL__

As suggested by Torvalds the kernel build should only depend
on __KERNEL__ being set and not rely on compiler definitions
like "linux" or "__linux__".

Signed-off-by: Linus Walleij <linus.walleij@...ricsson.com>
---
 include/linux/a.out.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/include/linux/a.out.h b/include/linux/a.out.h
index e86dfca..45ea44a 100644
--- a/include/linux/a.out.h
+++ b/include/linux/a.out.h
@@ -129,7 +129,7 @@ enum machine_type {
 #define SEGMENT_SIZE PAGE_SIZE
 #endif

-#ifdef linux
+#if defined(linux) || defined(__KERNEL__)
 #ifdef __KERNEL__
 #include <asm/page.h>
 #else
-- 
1.7.3.2

Yours,
Linus Walleij
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