[PATCH 03/12] ARM: kexec: remove 512MB restriction on kexec crashdump

[Pratyush Anand]

On Thu, Apr 28, 2016 at 2:57 PM, Russell King
<rmk+kernel at arm.linux.org.uk> wrote:
> Signed-off-by: Russell King <rmk+kernel at arm.linux.org.uk>
> ---
>  arch/arm/kernel/setup.c | 5 +----
>  1 file changed, 1 insertion(+), 4 deletions(-)
>
> diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
> index 77b54c461c52..d9317eec1eba 100644
> --- a/arch/arm/kernel/setup.c
> +++ b/arch/arm/kernel/setup.c
> @@ -943,7 +943,6 @@ late_initcall(init_machine_late);
>   * zImage relocating below the reserved region.
>   */
>  #define CRASH_ALIGN    (128 << 20)
> -#define CRASH_ADDR_MAX (PHYS_OFFSET + (512 << 20))
>
>  static inline unsigned long long get_total_mem(void)
>  {
> @@ -973,9 +972,7 @@ static void __init reserve_crashkernel(void)
>                 return;
>
>         if (crash_base <= 0) {
> -               unsigned long long crash_max = CRASH_ADDR_MAX;
> -               if (crash_max > (u32)~0)
> -                       crash_max = (u32)~0;
> +               unsigned long long crash_max = idmap_to_phys((u32)~0);
>                 crash_base = memblock_find_in_range(CRASH_ALIGN, crash_max,
>                                                     crash_size, CRASH_ALIGN);
>                 if (!crash_base) {

Reviewed-by: Pratyush Anand <panand at redhat.com>

Unrelated to these modification:
In function arch/arm/mm/init.c: arm_memblock_steal() may be  following
would be more appropriate?
memblock_alloc_base(size, align, idmap_to_phys(MEMBLOCK_ALLOC_ANYWHERE));