UML - Fix boot crash

From 7c1fed03b9fa32d4323d5caa6a9c7dcdd7eba767

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.

---
 arch/um/include/init.h |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

index b00a957..37dd097 100644
@@ -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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This is a note to let you know that we have just queued up the patch titled

Subject: uml: Fix boot crash

to the 2.6.25-stable tree. Its filename is

uml-fix-boot-crash.patch

A git repo of this tree can be found at
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

From [email protected] Tue Aug 5 13:14:58 2008
From: Jeff Dike <[email protected]>
Date: Tue, 5 Aug 2008 16:14:10 -0400
Subject: uml: Fix boot crash
To: [email protected]
Cc: LKML <[email protected]>, uml-devel <[email protected]>
Message-ID: <[email protected]>
Content-Disposition: inline

From: Jeff Dike <[email protected]>

commit 7c1fed03b9fa32d4323d5caa6a9c7dcdd7eba767 upstream

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.

---
 arch/um/include/init.h |    8 ++++++++
 1 file changed, 8 insertions(+)

@@ -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

Patches currently in stable-queue which might be from [email protected] are

queue-2.6.25/uml-fix-build-when-slob-is-enabled.patch queue-2.6.25/uml-fix-bad-ntp-interaction-with-clock.patch queue-2.6.25/uml-physical-memory-shouldn-t-include-initial-stack.patch queue-2.6.25/uml-track-and-make-up-lost-ticks.patch queue-2.6.25/uml-missed-kmalloc-in-pcap_user.c.patch queue-2.6.25/uml-deal-with-host-time-going-backwards.patch queue-2.6.25/uml-deal-with-inaccessible-address-space-start.patch queue-2.6.25/uml-missing-export-of-csum_partial-on-uml-amd64.patch queue-2.6.25/uml-memcpy-export-needs-to-follow-host-declaration.patch queue-2.6.25/uml-stub-needs-to-tolerate-sigwinch.patch queue-2.6.25/uml-work-around-broken-host-ptrace_sysemu.patch queue-2.6.25/uml-fix-gcc-ices-and-unresolved-externs.patch queue-2.6.25/uml-fix-boot-crash.patch

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