[PATCH 0/3] Bugfix for kdump on arm

From: Wang Nan
Date: Wed Jan 22 2014 - 06:28:49 EST

This patch series introduce 3 bugfix for kdump (and kexec) on arm platform.

kdump for arm in fact is corrupted (at least for omap4460). With one-month hard
work and with the help of a jtag debugger, we finally make kdump works

Following is the patches. The first 2 patches forms a group, it allow
ioremap_nocache to be taken on reserved pages on arm platform (which is
prohibited by 309caa9cc) and then use ioremap_nocache to copy kexec required
code. The last 1 is for crash dump kernel. It allow kernel to be loaded in the
middle of kernel awared physical memory. Without it, crashdump kernel must be
carefully configured to boot.

Wang Nan (3):
ARM: Premit ioremap() to map reserved pages
ARM: kexec: copying code to ioremapped area
ARM: allow kernel to be loaded in middle of phymem

arch/arm/kernel/machine_kexec.c | 18 ++++++++++++++++--
arch/arm/mm/init.c | 21 ++++++++++++++++++++-
arch/arm/mm/ioremap.c | 2 +-
arch/arm/mm/mmu.c | 13 +++++++++++++
kernel/kexec.c | 40 +++++++++++++++++++++++++++++++++++-----
mm/page_alloc.c | 7 +++++--
6 files changed, 90 insertions(+), 11 deletions(-)

Signed-off-by: Wang Nan <wangnan0@xxxxxxxxxx>
Cc: Eric Biederman <ebiederm@xxxxxxxxxxxx>
Cc: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Geng Hui <hui.geng@xxxxxxxxxx>


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