linux-kernel - Re: [Patch] arch/um/include/init.h: Fix missing macro definitions

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Date:	Fri, 1 Feb 2008 12:29:55 -0500
From:	Jeff Dike <jdike@...toit.com>
To:	WANG Cong <xiyou.wangcong@...il.com>, Andrew Morton <akpm@...l.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	user-mode-linux-devel@...ts.sourceforge.net
Subject: Re: [Patch] arch/um/include/init.h: Fix missing macro definitions

On Thu, Jan 31, 2008 at 11:06:34PM +0800, WANG Cong wrote:
> This patch fixed the following build error in current -git tree.
> 
> arch/um/kernel/config.c:10: error: expected declaration specifiers or '...' before '.' token
> ...

This is close to uml-arch-um-include-inith-needs-a-definition-of-__used.patch
that's currently in -mm.

Andrew, could you replace
uml-arch-um-include-inith-needs-a-definition-of-__used.patch with the
version below and push it to Linus?

				Jeff

-- 
Work email - jdike at linux dot intel dot com


init.h started breaking now for some reason.  It turns out that there wasn't a
definition of __used.  Fixed this by copying the relevant stuff from
compiler.h in the userspace case, and including compiler.h in the kernel case.

>From WANG Cong <xiyou.wangcong@...il.com> - added definition of __section

Signed-off-by: Jeff Dike <jdike@...ux.intel.com>
Cc: WANG Cong <xiyou.wangcong@...il.com>
---
 arch/um/include/init.h |   25 ++++++++++++++-----------
 1 file changed, 14 insertions(+), 11 deletions(-)

Index: linux-2.6-git/arch/um/include/init.h
===================================================================
--- linux-2.6-git.orig/arch/um/include/init.h	2008-02-01 10:41:14.000000000 -0500
+++ linux-2.6-git/arch/um/include/init.h	2008-02-01 10:52:34.000000000 -0500
@@ -40,6 +40,20 @@
 typedef int (*initcall_t)(void);
 typedef void (*exitcall_t)(void);
 
+#ifndef __KERNEL__
+#ifndef __section
+# define __section(S) __attribute__ ((__section__(#S)))
+#endif
+
+#if __GNUC_MINOR__ >= 3
+# define __used			__attribute__((__used__))
+#else
+# define __used			__attribute__((__unused__))
+#endif
+
+#else
+#include <linux/compiler.h>
+#endif
 /* These are for everybody (although not all archs will actually
    discard it in modules) */
 #define __init		__section(.init.text)
@@ -127,14 +141,3 @@ extern struct uml_param __uml_setup_star
 #endif
 
 #endif /* _LINUX_UML_INIT_H */
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
--
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