linux-kernel - [PATCH 17/39] kbuild: fix header export when __ASSEMBLY_

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Message-Id: <1244245377-17441-17-git-send-email-sam@ravnborg.org>
Date:	Sat,  6 Jun 2009 01:42:35 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	linux-kbuild <linux-kbuild@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Cc:	Sam Ravnborg <sam@...nborg.org>,
	Russell King <rmk+lkml@....linux.org.uk>,
	Jaswinder Singh Rajput <jaswinder@...nel.org>
Subject: [PATCH 17/39] kbuild: fix header export when __ASSEMBLY__ is used

unifdef got confused by:

Because it does not know __ASSEMBLY__ it does not
detect that htis is not for userspace.
This caused too much code to be exported, and headers_check barfed
over this code.

For arm this fixes following "make headers_check" warning:
/usr/include/asm/hwcap.h:29: extern's make no sense in userspace

Russell King suggested to undefine __ASSEMBLY__ to fix this warning.

Cc: Russell King <rmk+lkml@....linux.org.uk>
Cc: Jaswinder Singh Rajput <jaswinder@...nel.org>
Signed-off-by: Sam Ravnborg <sam@...nborg.org>
---
 scripts/headers_install.pl |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/scripts/headers_install.pl b/scripts/headers_install.pl
index c6ae405..bc70ea6 100644
--- a/scripts/headers_install.pl
+++ b/scripts/headers_install.pl
@@ -20,7 +20,7 @@ use strict;
 
 my ($readdir, $installdir, $arch, @files) = @ARGV;
 
-my $unifdef = "scripts/unifdef -U__KERNEL__";
+my $unifdef = "scripts/unifdef -U__KERNEL__ -U__ASSEMBLY__";
 
 foreach my $file (@files) {
 	local *INFILE;
-- 
1.6.3.rc3.40.g75b44

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