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Move the `debug_exception_enter()` and `debug_exception_exit()` functions from mm/fault.c, as they are needed to split the debug exceptions entry paths from the current unified one. Make them externally visible in include/asm/exception.h until the caller in mm/fault.c is cleaned up. Signed-off-by: Ada Couprie Diaz <ada.coupriediaz@arm.com> Tested-by: Luis Claudio R. Goncalves <lgoncalv@redhat.com> Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com> Reviewed-by: Will Deacon <will@kernel.org> Acked-by: Mark Rutland <mark.rutland@arm.com> Link: https://lore.kernel.org/r/20250707114109.35672-7-ada.coupriediaz@arm.com Signed-off-by: Will Deacon <will@kernel.org>