From: Laura Abbott <labb...@redhat.com> commit 568c5fe5a54 upstream.
Certain architectures may have the kernel image mapped separately to alias the linear map. Introduce a macro lm_alias to translate a kernel image symbol into its linear alias. This is used in part with work to add CONFIG_DEBUG_VIRTUAL support for arm64. Reviewed-by: Mark Rutland <mark.rutl...@arm.com> Tested-by: Mark Rutland <mark.rutl...@arm.com> Signed-off-by: Laura Abbott <labb...@redhat.com> Signed-off-by: Will Deacon <will.dea...@arm.com> Signed-off-by: Alex Shi <alex....@linaro.org> --- include/linux/mm.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/include/linux/mm.h b/include/linux/mm.h index 2217e2f..edd2480 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -76,6 +76,10 @@ extern int mmap_rnd_compat_bits __read_mostly; #define page_to_virt(x) __va(PFN_PHYS(page_to_pfn(x))) #endif +#ifndef lm_alias +#define lm_alias(x) __va(__pa_symbol(x)) +#endif + /* * To prevent common memory management code establishing * a zero page mapping on a read fault. -- 2.7.4
