Re: [uml-devel] [PATCH] UML - Fix boot crash

[Andrew Morton <akpm@linux-foundation.org>]

On Wed, 23 Jul 2008 11:46:50 -0400
Jeff Dike <jdike@addtoit.com> wrote:

> 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@linux.intel.com>
> ---
>  arch/um/include/init.h |    8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> Index: linux-2.6.22/arch/um/include/init.h
> ===================================================================
> --- linux-2.6.22.orig/arch/um/include/init.h	2008-02-18 11:53:50.000000000 -0500
> +++ linux-2.6.22/arch/um/include/init.h	2008-07-20 18:06:35.000000000 -0400
> @@ -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

Needed in 2.6.26.x, but also applies to 2.6.25.  Is it also needed in
2.6.25.x?


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