Messages in this thread Patch in this message | | | From | greentime.hu@sifive ... | Subject | [PATCH] RISC-V: fix virtual address overlapped in FIXADDR_START and VMEMMAP_START | Date | Wed, 16 Oct 2019 15:34:08 +0800 |
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From: Greentime Hu <greentime.hu@sifive.com>
This patch fixes the virtual address layout in pgtable.h. The virtual address of FIXADDR_START and VMEMMAP_START should not be overlapped. These addresses will be existed at the same time in Linux kernel that they can't be overlapped.
Fixes: d95f1a542c3d ("RISC-V: Implement sparsemem") Signed-off-by: Greentime Hu <greentime.hu@sifive.com> --- arch/riscv/include/asm/pgtable.h | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index 4f4162d90586..b927fb4ecf1c 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -87,14 +87,6 @@ extern pgd_t swapper_pg_dir[]; #define VMALLOC_END (PAGE_OFFSET - 1) #define VMALLOC_START (PAGE_OFFSET - VMALLOC_SIZE) -#define FIXADDR_TOP VMALLOC_START -#ifdef CONFIG_64BIT -#define FIXADDR_SIZE PMD_SIZE -#else -#define FIXADDR_SIZE PGDIR_SIZE -#endif -#define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE) - /* * Roughly size the vmemmap space to be large enough to fit enough * struct pages to map half the virtual address space. Then @@ -108,6 +100,14 @@ extern pgd_t swapper_pg_dir[]; #define vmemmap ((struct page *)VMEMMAP_START) +#define FIXADDR_TOP (VMEMMAP_START) +#ifdef CONFIG_64BIT +#define FIXADDR_SIZE PMD_SIZE +#else +#define FIXADDR_SIZE PGDIR_SIZE +#endif +#define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE) + /* * ZERO_PAGE is a global shared page that is always zero, * used for zero-mapped memory areas, etc. -- 2.17.1
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