This is a note to let you know that I've just added the patch titled
avr32: setup crt for early panic()
to the 3.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
avr32-setup-crt-for-early-panic.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 7a2a74f4b856993218aa7cdeeb6c3103101340db Mon Sep 17 00:00:00 2001
From: Andreas Bießmann <andreas@xxxxxxxxxxxx>
Date: Thu, 24 Oct 2013 12:31:03 +0200
Subject: avr32: setup crt for early panic()
From: Andreas Bießmann <andreas@xxxxxxxxxxxx>
commit 7a2a74f4b856993218aa7cdeeb6c3103101340db upstream.
Before the CRT was (fully) set up in kernel_entry (bss cleared before in
_start, but also not before jump to panic() in no_tag_table case).
This patch fixes this up to have a fully working CRT when branching to panic()
in no_tag_table.
Signed-off-by: Andreas Bießmann <andreas@xxxxxxxxxxxx>
Acked-by: Hans-Christian Egtvedt <egtvedt@xxxxxxxxxxxx>
Cc: Haavard Skinnemoen <hskinnemoen@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/avr32/boot/u-boot/head.S | 30 +++++++++++++++++++++++++-----
arch/avr32/kernel/head.S | 20 --------------------
2 files changed, 25 insertions(+), 25 deletions(-)
--- a/arch/avr32/boot/u-boot/head.S
+++ b/arch/avr32/boot/u-boot/head.S
@@ -8,6 +8,8 @@
* published by the Free Software Foundation.
*/
#include <asm/setup.h>
+#include <asm/thread_info.h>
+#include <asm/sysreg.h>
/*
* The kernel is loaded where we want it to be and all caches
@@ -20,11 +22,6 @@
.section .init.text,"ax"
.global _start
_start:
- /* Check if the boot loader actually provided a tag table */
- lddpc r0, magic_number
- cp.w r12, r0
- brne no_tag_table
-
/* Initialize .bss */
lddpc r2, bss_start_addr
lddpc r3, end_addr
@@ -34,6 +31,25 @@ _start:
cp r2, r3
brlo 1b
+ /* Initialize status register */
+ lddpc r0, init_sr
+ mtsr SYSREG_SR, r0
+
+ /* Set initial stack pointer */
+ lddpc sp, stack_addr
+ sub sp, -THREAD_SIZE
+
+#ifdef CONFIG_FRAME_POINTER
+ /* Mark last stack frame */
+ mov lr, 0
+ mov r7, 0
+#endif
+
+ /* Check if the boot loader actually provided a tag table */
+ lddpc r0, magic_number
+ cp.w r12, r0
+ brne no_tag_table
+
/*
* Save the tag table address for later use. This must be done
* _after_ .bss has been initialized...
@@ -53,6 +69,10 @@ bss_start_addr:
.long __bss_start
end_addr:
.long _end
+init_sr:
+ .long 0x007f0000 /* Supervisor mode, everything masked */
+stack_addr:
+ .long init_thread_union
no_tag_table:
sub r12, pc, (. - 2f)
--- a/arch/avr32/kernel/head.S
+++ b/arch/avr32/kernel/head.S
@@ -10,33 +10,13 @@
#include <linux/linkage.h>
#include <asm/page.h>
-#include <asm/thread_info.h>
-#include <asm/sysreg.h>
.section .init.text,"ax"
.global kernel_entry
kernel_entry:
- /* Initialize status register */
- lddpc r0, init_sr
- mtsr SYSREG_SR, r0
-
- /* Set initial stack pointer */
- lddpc sp, stack_addr
- sub sp, -THREAD_SIZE
-
-#ifdef CONFIG_FRAME_POINTER
- /* Mark last stack frame */
- mov lr, 0
- mov r7, 0
-#endif
-
/* Start the show */
lddpc pc, kernel_start_addr
.align 2
-init_sr:
- .long 0x007f0000 /* Supervisor mode, everything masked */
-stack_addr:
- .long init_thread_union
kernel_start_addr:
.long start_kernel
Patches currently in stable-queue which might be from andreas@xxxxxxxxxxxx are
queue-3.12/avr32-fix-out-of-range-jump-in-large-kernels.patch
queue-3.12/avr32-setup-crt-for-early-panic.patch
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