linux-kernel - Re: [PATCH 2/2] initramfs: Fix initramfs size calculation

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Message-ID: <20101018103729.GA4122@linux.vnet.ibm.com>
Date:	Mon, 18 Oct 2010 12:37:30 +0200
From:	Hendrik Brueckner <brueckner@...ux.vnet.ibm.com>
To:	Mike Frysinger <vapier.adi@...il.com>
Cc:	Hendrik Brueckner <brueckner@...ux.vnet.ibm.com>, mmarek@...e.cz,
	Sam Ravnborg <sam@...nborg.org>,
	Michael Holzheu <holzheu@...ux.vnet.ibm.com>,
	tabbott@...lice.com, vda.linux@...glemail.com, hpa@...ux.intel.com,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	heiko.carstens@...ibm.com, schwidefsky@...ibm.com
Subject: Re: [PATCH 2/2] initramfs: Fix initramfs size calculation

Hi Mike,

On Sun, Oct 17, 2010 at 02:28:11PM -0400, Mike Frysinger wrote:
> On Tue, Aug 31, 2010 at 04:23, Hendrik Brueckner wrote:
> i'm pretty sure this breaks on every symbol-prefixed arch.  at least,
> it broke every Blackfin board:
> init/built-in.o: In function `populate_rootfs':
> init/initramfs.c:(.init.text+0x2548): undefined reference to `__initramfs_size'
> init/initramfs.c:(.init.text+0x254e): undefined reference to `__initramfs_size'
> make: *** [.tmp_vmlinux1] Error 1
> 
> look at VMLINUX_SYMBOL() in the vmlinux.lds.h file

Thanks for your feedback.  Could you try the patch below and let me know
if it works for your Blackfin board.

Thanks and kind regards,
  Hendrik

--- 8< ----------------

Define the __initramfs_size variable using VMLINUX_SYMBOL() to take
care of symbol-prefixed architectures, for example, blackfin.

Signed-off-by: Hendrik Brueckner <brueckner@...ux.vnet.ibm.com>
---
 usr/initramfs_data.S |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/usr/initramfs_data.S
+++ b/usr/initramfs_data.S
@@ -22,14 +22,15 @@
 */
 
 #include <linux/stringify.h>
+#include <asm-generic/vmlinux.lds.h>
 
 .section .init.ramfs,"a"
 __irf_start:
 .incbin __stringify(INITRAMFS_IMAGE)
 __irf_end:
 .section .init.ramfs.info,"a"
-.globl __initramfs_size
-__initramfs_size:
+.globl VMLINUX_SYMBOL(__initramfs_size)
+VMLINUX_SYMBOL(__initramfs_size):
 #ifdef CONFIG_32BIT
 	.long __irf_end - __irf_start
 #else
--
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