From: Ard Biesheuvel <[email protected]> __map_memblock() and map_mem() always operate on swapper_pg_dir, so there is no need to pass around a pgd_t pointer between them.
Reviewed-by: Ryan Roberts <[email protected]> Signed-off-by: Ard Biesheuvel <[email protected]> --- arch/arm64/mm/mmu.c | 25 ++++++++++---------- 1 file changed, 12 insertions(+), 13 deletions(-) diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index 652fe2c52b5a..744cf76f25aa 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -1019,11 +1019,11 @@ static void update_mapping_prot(phys_addr_t phys, unsigned long virt, flush_tlb_kernel_range(virt, virt + size); } -static void __init __map_memblock(pgd_t *pgdp, phys_addr_t start, - phys_addr_t end, pgprot_t prot, int flags) +static void __init __map_memblock(phys_addr_t start, phys_addr_t end, + pgprot_t prot, int flags) { - early_create_pgd_mapping(pgdp, start, __phys_to_virt(start), end - start, - prot, early_pgtable_alloc, flags); + early_create_pgd_mapping(swapper_pg_dir, start, __phys_to_virt(start), + end - start, prot, early_pgtable_alloc, flags); } void __init mark_linear_text_alias_ro(void) @@ -1071,13 +1071,13 @@ static phys_addr_t __init arm64_kfence_alloc_pool(void) return kfence_pool; } -static void __init arm64_kfence_map_pool(phys_addr_t kfence_pool, pgd_t *pgdp) +static void __init arm64_kfence_map_pool(phys_addr_t kfence_pool) { if (!kfence_pool) return; /* KFENCE pool needs page-level mapping. */ - __map_memblock(pgdp, kfence_pool, kfence_pool + KFENCE_POOL_SIZE, + __map_memblock(kfence_pool, kfence_pool + KFENCE_POOL_SIZE, pgprot_tagged(PAGE_KERNEL), NO_BLOCK_MAPPINGS | NO_CONT_MAPPINGS); memblock_clear_nomap(kfence_pool, KFENCE_POOL_SIZE); @@ -1113,11 +1113,11 @@ bool arch_kfence_init_pool(void) #else /* CONFIG_KFENCE */ static inline phys_addr_t arm64_kfence_alloc_pool(void) { return 0; } -static inline void arm64_kfence_map_pool(phys_addr_t kfence_pool, pgd_t *pgdp) { } +static inline void arm64_kfence_map_pool(phys_addr_t kfence_pool) { } #endif /* CONFIG_KFENCE */ -static void __init map_mem(pgd_t *pgdp) +static void __init map_mem(void) { static const u64 direct_map_end = _PAGE_END(VA_BITS_MIN); phys_addr_t kernel_start = __pa_symbol(_text); @@ -1162,7 +1162,7 @@ static void __init map_mem(pgd_t *pgdp) * if MTE is present. Otherwise, it has the same attributes as * PAGE_KERNEL. */ - __map_memblock(pgdp, start, end, pgprot_tagged(PAGE_KERNEL), + __map_memblock(start, end, pgprot_tagged(PAGE_KERNEL), flags); } @@ -1176,10 +1176,9 @@ static void __init map_mem(pgd_t *pgdp) * Note that contiguous mappings cannot be remapped in this way, * so we should avoid them here. */ - __map_memblock(pgdp, kernel_start, kernel_end, - PAGE_KERNEL, NO_CONT_MAPPINGS); + __map_memblock(kernel_start, kernel_end, PAGE_KERNEL, NO_CONT_MAPPINGS); memblock_clear_nomap(kernel_start, kernel_end - kernel_start); - arm64_kfence_map_pool(early_kfence_pool, pgdp); + arm64_kfence_map_pool(early_kfence_pool); } void mark_rodata_ro(void) @@ -1401,7 +1400,7 @@ static void __init create_idmap(void) void __init paging_init(void) { - map_mem(swapper_pg_dir); + map_mem(); memblock_allow_resize(); -- 2.53.0.959.g497ff81fa9-goog
