Ard Biesheuvel eccc1bff1b arm64/mmu: ignore debug_pagealloc for kernel segments
The debug_pagealloc facility manipulates kernel mappings in the linear
region at page granularity to detect out of bounds or use-after-free
accesses. Since the kernel segments are not allocated dynamically,
there is no point in taking the debug_pagealloc_enabled flag into
account for them, and we can use block mappings unconditionally.

Note that this applies equally to the linear alias of text/rodata:
we will never have dynamic allocations there given that the same
memory is statically in use by the kernel image.

Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 13:55:21 +00:00
..
2016-12-26 13:05:17 -05:00
2017-02-22 10:46:44 -08:00
2017-02-09 13:47:56 +00:00
2016-09-06 19:09:38 +01:00