From: Sam Ravnborg <sam@ravnborg•org>
To: Tim Abbott <tabbott@MIT•EDU>
Cc: linux-mips@linux-mips•org, linux-m68k@vger•kernel.org,
linux-ia64@vger•kernel.org, linux-sh@vger•kernel.org,
Denys Vlasenko <vda.linux@googlemail•com>,
Greg Ungerer <gerg@uclinux•org>, Jeff Arnold <jbarnold@mit•edu>,
linuxppc-dev@ozlabs•org, Paul Mackerras <paulus@samba•org>,
"H. Peter Anvin" <hpa@zytor•com>,
sparclinux@vger•kernel.org, Waseem Daher <wdaher@mit•edu>,
linux-s390@vger•kernel.org,
Jesper Nilsson <jesper.nilsson@axis•com>,
Yoshinori Sato <ysato@users•sourceforge.jp>,
Helge Deller <deller@gmx•de>, Ingo Molnar <mingo@redhat•com>,
Geert Uytterhoeven <geert@linux-m68k•org>,
microblaze-uclinux@itee•uq.edu.au,
Russell King <rmk+kernel@arm•linux.org.uk>,
user-mode-linux-devel@lists•sourceforge.net,
Heiko Carstens <heiko.carstens@de•ibm.com>,
Jeff Dike <jdike@addtoit•com>,
dev-etrax@axis•com, Mikael Starvik <starvik@axis•com>,
Cyrill Gorcunov <gorcunov@openvz•org>,
Michal Simek <monstr@monstr•eu>,
Richard Henderson <rth@twiddle•net>,
Chris Zankel <chris@zankel•net>, Bryan Wu <cooloney@kernel•org>,
Tony Luck <tony.luck@intel•com>,
linux-parisc@vger•kernel.org,
Haavard Skinnemoen <hskinnemoen@atmel•com>,
Hirokazu Takata <takata@linux-m32r•org>,
Linux kernel mailing list <linux-kernel@vger•kernel.org>,
Ralf Baechle <ralf@linux-mips•org>,
Anders Kaseorg <andersk@mit•edu>,
Kyle McMartin <kyle@mcmartin•ca>,
Paul Mundt <lethal@linux-sh•org>,
Thomas Gleixner <tglx@linutronix•de>,
linux-alpha@vger•kernel.org,
Martin Schwidefsky <schwidefsky@de•ibm.com>,
uclinux-dist-devel@blackfin•uclinux.org,
Linus Torvalds <torvalds@linux-foundation•org>,
"David S. Miller" <davem@davemloft•net>
Subject: Re: [PATCH v2 2/6] Add new NOSAVE_DATA linker script macro.
Date: Fri, 1 May 2009 11:21:14 +0200 [thread overview]
Message-ID: <20090501092114.GC18326@uranus.ravnborg.org> (raw)
In-Reply-To: <1241121253-32341-3-git-send-email-tabbott@mit.edu>
On Thu, Apr 30, 2009 at 03:54:09PM -0400, Tim Abbott wrote:
> This patch is preparation for replacing most ".data.nosave" in the
> kernel with macros, so that the section name can later be changed
> without having to touch a lot of the kernel.
>
> The long-term goal here is to be able to change the kernel's magic
> section names to those that are compatible with -ffunction-sections
> -fdata-sections. This requires renaming all magic sections with names
> of the form ".data.foo".
>
> Signed-off-by: Tim Abbott <tabbott@mit•edu>
> Cc: Sam Ravnborg <sam@ravnborg•org>
> ---
> include/asm-generic/vmlinux.lds.h | 7 +++++++
> 1 files changed, 7 insertions(+), 0 deletions(-)
>
> diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
> index 3d88c87..f5ebd2b 100644
> --- a/include/asm-generic/vmlinux.lds.h
> +++ b/include/asm-generic/vmlinux.lds.h
> @@ -124,6 +124,13 @@
> . = ALIGN(PAGE_SIZE); \
> *(.bss.page_aligned)
>
> +#define NOSAVE_DATA \
> + . = ALIGN(PAGE_SIZE); \
> + __nosave_begin = .; \
> + *(.data.nosave) \
> + . = ALIGN(PAGE_SIZE); \
> + __nosave_end = .;
> +
You need to use:
VMLINUX_SYMBOL(__nosave_begin) = .;
Otherwise architectures such as m68k wil break as they
add a leading underscore.
See other symbols that is defined inside vmlinux.lds.h
Sam
next prev parent reply other threads:[~2009-05-01 9:19 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-30 19:54 [PATCH v2 0/6] macros for section name cleanup Tim Abbott
2009-04-30 19:54 ` [PATCH v2 1/6] Add new macros for page-aligned data and bss sections Tim Abbott
2009-04-30 19:54 ` [PATCH v2 2/6] Add new NOSAVE_DATA linker script macro Tim Abbott
2009-04-30 19:54 ` [PATCH v2 3/6] Add new CACHELINE_ALIGNED_DATA " Tim Abbott
2009-04-30 19:54 ` [PATCH v2 4/6] Add new INIT_TASK_DATA() " Tim Abbott
2009-04-30 19:54 ` [PATCH v2 5/6] Add new READ_MOSTLY_DATA(align) " Tim Abbott
2009-04-30 19:54 ` [PATCH v2 6/6] Add support for __read_mostly to linux/cache.h Tim Abbott
2009-05-01 9:21 ` Sam Ravnborg [this message]
2009-05-01 9:18 ` [PATCH v2 1/6] Add new macros for page-aligned data and bss sections Sam Ravnborg
2009-05-01 13:54 ` Tim Abbott
2009-05-01 16:33 ` H. Peter Anvin
2009-05-01 17:17 ` Sam Ravnborg
2009-05-01 17:18 ` H. Peter Anvin
2009-05-01 17:44 ` Sam Ravnborg
2009-05-01 17:47 ` H. Peter Anvin
2009-05-01 23:02 ` Andreas Schwab
2009-05-01 9:04 ` [PATCH v2 0/6] macros for section name cleanup Sam Ravnborg
2009-05-01 14:21 ` Sam Ravnborg
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