UML - Fix boot crash

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(+)

Index: linux-2.6.22/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

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It does apply nicely, but I think it's not needed for -stable. AIUI, -stable is for actual, realized bugs, and this one is more latent, being enabled by the unit-at-a-time change during 2.6.26-rc.

Jeff

Work email - jdike at linux dot intel dot com

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... and just to be clear, I mean I think it's not exactly 2.6.25.x material. It is definite 2.26.6.x material.

Jeff

Work email - jdike at linux dot intel dot com

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Ok, fair enough, I'll queue it up when it hits Linus's tree.

Neat hack: If you add the line
cc: stable <[email protected]>
to the signed-off-by area of a patch, when it is applied by Linus it will be sent automatically to the stable team as well and we will know then that it is safe to apply to our trees. No additional work from you would be needed then.

thanks,

greg k-h

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