arm64: Mark __stack_chk_guard as __ro_after_init
__stack_chk_guard is setup once while init stage and never changed after that. Although the modification of this variable at runtime will usually cause the kernel to crash (so does the attacker), it should be marked as __ro_after_init, and it should not affect performance if it is placed in the ro_after_init section. Signed-off-by: Dan Li <ashimida@linux.alibaba.com> Acked-by: Mark Rutland <mark.rutland@arm.com> Link: https://lore.kernel.org/r/1631612642-102881-1-git-send-email-ashimida@linux.alibaba.comSigned-off-by: Catalin Marinas <catalin.marinas@arm.com>
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