On Wed, Oct 31, 2018 at 12:28:41PM -0700, Florian Fainelli wrote:
> ARM64 is the only architecture that re-defines
> __early_init_dt_declare_initrd() in order for that function to populate
> initrd_start/initrd_end with physical addresses instead of virtual
> addresses. Instead of having an override we can leverage
> drivers/of/fdt.c populating phys_initrd_start/phys_initrd_size to
> populate those variables for us.
>
> Signed-off-by: Florian Fainelli <f.fainelli at gmail.com>
> ---
> arch/arm64/mm/init.c | 19 +++++++++----------
> 1 file changed, 9 insertions(+), 10 deletions(-)
>
> diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
> index 3cf87341859f..00ef2166bb73 100644
> --- a/arch/arm64/mm/init.c
> +++ b/arch/arm64/mm/init.c
> @@ -72,8 +72,8 @@ static int __init early_initrd(char *p)
> if (*endp == ',') {
> size = memparse(endp + 1, NULL);
>
> - initrd_start = start;
> - initrd_end = start + size;
> + phys_initrd_start = start;
> + phys_initrd_size = size;
> }
> return 0;
> }
> @@ -408,14 +408,14 @@ void __init arm64_memblock_init(void)
> memblock_add(__pa_symbol(_text), (u64)(_end - _text));
> }
>
> - if (IS_ENABLED(CONFIG_BLK_DEV_INITRD) && initrd_start) {
> + if (IS_ENABLED(CONFIG_BLK_DEV_INITRD) && phys_initrd_size) {
> /*
> * Add back the memory we just removed if it results in the
> * initrd to become inaccessible via the linear mapping.
> * Otherwise, this is a no-op
> */
> - u64 base = initrd_start & PAGE_MASK;
> - u64 size = PAGE_ALIGN(initrd_end) - base;
> + u64 base = phys_initrd_start & PAGE_MASK;
> + u64 size = PAGE_ALIGN(phys_initrd_size);
>
> /*
> * We can only add back the initrd memory if we don't end up
> @@ -460,12 +460,11 @@ void __init arm64_memblock_init(void)
> */
> memblock_reserve(__pa_symbol(_text), _end - _text);
> #ifdef CONFIG_BLK_DEV_INITRD
> - if (initrd_start) {
> - memblock_reserve(initrd_start, initrd_end - initrd_start);
> -
> + if (phys_initrd_size) {
Since we're touching the if anyways, perhaps convert the #ifdef to a C
IS_ENABLED().
> /* the generic initrd code expects virtual addresses */
> - initrd_start = __phys_to_virt(initrd_start);
> - initrd_end = __phys_to_virt(initrd_end);
> + initrd_start = __phys_to_virt(phys_initrd_start);
> + initrd_end = initrd_start + phys_initrd_size;
> + initrd_below_start_ok = 0;
> }
> #endif
>
> --
> 2.17.1
>
