[PATCH] arm64: add kc_offset_to_vaddr and kc_vaddr_to_offset macro
From: Will Deacon <hidden>
Date: 2015-09-02 10:25:00
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lkml
On Sun, Aug 30, 2015 at 07:19:59AM +0100, yalin wang wrote:
quoted hunk ↗ jump to hunk
This patch add kc_offset_to_vaddr() and kc_vaddr_to_offset(), the default version doesn't work on arm64, because arm64 kernel address is below the PAGE_OFFSET, like module address and vmemmap address are all below PAGE_OFFSET address. Signed-off-by: yalin wang <redacted> --- arch/arm64/include/asm/pgtable.h | 2 ++ 1 file changed, 2 insertions(+)diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index d374191..ef1ed5c 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h@@ -660,6 +660,8 @@ static inline void update_mmu_cache(struct vm_area_struct *vma, #define update_mmu_cache_pmd(vma, address, pmd) do { } while (0) +#define kc_vaddr_to_offset(v) ((v) & ((1UL << VA_BITS) - 1)) +#define kc_offset_to_vaddr(o) ((o) | ~((1UL << VA_BITS) - 1))
I think it would be cleaner to define something like VIRTUAL_BASE, and then define the vmalloc area in terms of that as well as these kcore macros. Will