diff options
| author | Laura Abbott <labbott@redhat.com> | 2017-01-10 13:35:42 -0800 |
|---|---|---|
| committer | Alex Shi <alex.shi@linaro.org> | 2018-03-22 16:43:44 +0800 |
| commit | c73cf78fef4f53aedf1499f64483a859a0d5dde3 (patch) | |
| tree | ea58d9766b47217fc1be0f4c611416434fa8d971 | |
| parent | 06eb38abaf83b589a5e66ca4749eee16fa0d9854 (diff) | |
mm: Introduce lm_alias
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.rutland@arm.com>
Tested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Alex Shi <alex.shi@linaro.org>
| -rw-r--r-- | include/linux/mm.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 5c2bf9096b7a..7634d8a7006f 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -59,6 +59,14 @@ extern int sysctl_legacy_va_layout; #define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x), 0)) #endif +#ifndef page_to_virt +#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. |