linux-kernel - [PATCH 13/14] UML

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Message-ID: <20080801224135.GA13735@c2.user-mode-linux.org>
Date:	Fri, 1 Aug 2008 18:41:35 -0400
From:	Jeff Dike <jdike@...toit.com>
To:	stable@...nel.org
Cc:	LKML <linux-kernel@...r.kernel.org>,
	uml-devel <user-mode-linux-devel@...ts.sourceforge.net>
Subject: [PATCH 13/14] UML - Fix boot crash

>From 7ca5503f5ee32fb3cd6aa6eca21a8edfe09a7717 Mon Sep 17 00:00:00 2001

My copying of linux/init.h didn't go far enough.  The definition of
__used singled out gcc minor version 3, but didn't care what the major
version was.  This broke when unit-at-a-time was added and gcc started
throwing out initcalls.

This results in an early boot crash when ptrace tries to initialize a
process with an empty, uninitialized register set.

Signed-off-by: Jeff Dike <jdike@...ux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
---
 arch/um/include/init.h |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/arch/um/include/init.h b/arch/um/include/init.h
index b00a957..37dd097 100644
--- a/arch/um/include/init.h
+++ b/arch/um/include/init.h
@@ -45,6 +45,8 @@ typedef void (*exitcall_t)(void);
 # define __section(S) __attribute__ ((__section__(#S)))
 #endif
 
+#if __GNUC__ == 3
+
 #if __GNUC_MINOR__ >= 3
 # define __used			__attribute__((__used__))
 #else
@@ -52,6 +54,12 @@ typedef void (*exitcall_t)(void);
 #endif
 
 #else
+#if __GNUC__ == 4
+# define __used			__attribute__((__used__))
+#endif
+#endif
+
+#else
 #include <linux/compiler.h>
 #endif
 /* These are for everybody (although not all archs will actually
-- 
1.5.5.1

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