linux-kernel - Re: [PATCH][GIT PULL][for 2.6.35] tracing: Add alignment to syscall metadata declarations

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Date:	Fri, 9 Jul 2010 14:25:57 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Zeev Tarantov <zeev.tarantov@...il.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Maciej@...ispam.struernethosting.dk,
	"Rutecki <"@antispam.struernethosting.dk
Subject: Re: [PATCH][GIT PULL][for 2.6.35] tracing: Add alignment to syscall 
	metadata declarations

On Fri, Jul 9, 2010 at 1:33 PM, Sam Ravnborg <sam@...nborg.org> wrote:
>
> Something like this:
> (whitespace damaged)
> diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
> index 48c5299..64430d3 100644
> --- a/include/asm-generic/vmlinux.lds.h
> +++ b/include/asm-generic/vmlinux.lds.h
> @@ -133,7 +133,8 @@
>  #endif
>
>  #ifdef CONFIG_FTRACE_SYSCALLS
> -#define TRACE_SYSCALLS() VMLINUX_SYMBOL(__start_syscalls_metadata) = .;        \
> +#define TRACE_SYSCALLS() . = ALIGN(8);                                 \
> +                        VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
>                         *(__syscalls_metadata)                         \
>                         VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
>  #else

If this is confirmed to fix it, then I would much prefer this version.

That said, I do wonder whether we shouldn't do the ALIGN(8) in the
DATA_DATA define instead. That's what we do for other things like this
(start_markers, start__verbose, etc etc)

                       Linus
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