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 reliablly. 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 at huawei.com> Cc: Eric Biederman <ebiederm at xmission.com> Cc: Russell King <rmk+kernel at arm.linux.org.uk> Cc: Andrew Morton <akpm at linux-foundation.org> Cc: Geng Hui <hui.geng at huawei.com> -- 1.8.4
