linux-kernel - Re: [PATCH] Define _addr_lsb in siginfo

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Date:	Fri, 8 Oct 2010 20:27:31 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Andi Kleen <andi@...stfloor.org>
cc:	torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org,
	Andi Kleen <ak@...ux.intel.com>, ralf@...ux-mips.org,
	tony.luck@...el.com
Subject: Re: [PATCH] Define _addr_lsb in siginfo_t for mips and ia64

On Fri, 8 Oct 2010, Andi Kleen wrote:

> From: Andi Kleen <ak@...ux.intel.com>
> 
> Define an _addr_lsb field in the mips and ia64 siginfo_ts, following
> the asm-generic version. This just puts the field over padding.
> 
> This fixes a compilation problem introduced with a337fda.

But it does not fix the mess you created in kernel/signal.c (aside of
the completely braindaed #ifdef, it's whitespace damaged) with a two
days old patch which has neither seen next, nor been reviewed by
people who care about core code nor been cross-compiled which is
mandatory for core kernel code changes.

The correct fix is to revert the patch in kernel/signal.c and fix this
proper in .37. This put_user is missing since .32 when you introduced
that grossly misnamed si extension, so there is no rush to get this in
during the late -rc cycle.

Thanks

	tglx

> Cc: ralf@...ux-mips.org
> Cc: tony.luck@...el.com
> Signed-off-by: Andi Kleen <ak@...ux.intel.com>
> ---
>  arch/ia64/include/asm/siginfo.h |    1 +
>  arch/mips/include/asm/siginfo.h |    1 +
>  2 files changed, 2 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/ia64/include/asm/siginfo.h b/arch/ia64/include/asm/siginfo.h
> index 118d429..d20bf96 100644
> --- a/arch/ia64/include/asm/siginfo.h
> +++ b/arch/ia64/include/asm/siginfo.h
> @@ -62,6 +62,7 @@ typedef struct siginfo {
>  			int _imm;		/* immediate value for "break" */
>  			unsigned int _flags;	/* see below */
>  			unsigned long _isr;	/* isr */
> +			short _addr_lsb;
>  		} _sigfault;
>  
>  		/* SIGPOLL */
> diff --git a/arch/mips/include/asm/siginfo.h b/arch/mips/include/asm/siginfo.h
> index 96e28f1..709f7d4 100644
> --- a/arch/mips/include/asm/siginfo.h
> +++ b/arch/mips/include/asm/siginfo.h
> @@ -88,6 +88,7 @@ typedef struct siginfo {
>  #ifdef __ARCH_SI_TRAPNO
>  			int _trapno;	/* TRAP # which caused the signal */
>  #endif
> +			short _addr_lsb;	
>  		} _sigfault;
>  
>  		/* SIGPOLL, SIGXFSZ (To do ...)  */
> -- 
> 1.7.1
> 
> --
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