[PATCH] arm64: assembler: make adr_l work in modules under KASLR

[Will Deacon]

On Wed, Jan 11, 2017 at 02:54:53PM +0000, Ard Biesheuvel wrote:
> When CONFIG_RANDOMIZE_MODULE_REGION_FULL=y, the offset between loaded
> modules and the core kernel may exceed 4 GB, putting symbols exported
> by the core kernel out of the reach of the ordinary adrp/add instruction
> pairs used to generate relative symbol references. So make the adr_l
> macro emit a movz/movk sequence instead when executing in module context.
> 
> While at it, remove the pointless special case for the stack pointer.
> 
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel at linaro.org>
> ---
>  arch/arm64/include/asm/assembler.h | 36 +++++++++++++++-----
>  1 file changed, 27 insertions(+), 9 deletions(-)

Given that you need this for 4.11, I suggest Catalin takes it as a fix
for 4.10 to avoid the crypto dependency.

Acked-by: Will Deacon <will.deacon at arm.com>

Will