From: Yinghai Lu Date: Thu, 24 Jan 2013 20:19:46 +0000 (-0800) Subject: x86, 64bit, mm: Make pgd next calculation consistent with pud/pmd X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c2bdee594ebcf4a531afe795baf18da509438392;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git x86, 64bit, mm: Make pgd next calculation consistent with pud/pmd Just like the way we calculate next for pud and pmd, aka round down and add size. Also, do not do boundary-checking with 'next', and just pass 'end' down to phys_pud_init() instead. Because the loop in phys_pud_init() stops at PTRS_PER_PUD and thus can handle a possibly bigger 'end' properly. Signed-off-by: Yinghai Lu Link: http://lkml.kernel.org/r/1359058816-7615-6-git-send-email-yinghai@kernel.org Signed-off-by: H. Peter Anvin --- diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index 191ab12f5ff3..d7af907c07f4 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -530,9 +530,7 @@ kernel_physical_mapping_init(unsigned long start, pgd_t *pgd = pgd_offset_k(start); pud_t *pud; - next = (start + PGDIR_SIZE) & PGDIR_MASK; - if (next > end) - next = end; + next = (start & PGDIR_MASK) + PGDIR_SIZE; if (pgd_val(*pgd)) { pud = (pud_t *)pgd_page_vaddr(*pgd); @@ -542,7 +540,7 @@ kernel_physical_mapping_init(unsigned long start, } pud = alloc_low_page(); - last_map_addr = phys_pud_init(pud, __pa(start), __pa(next), + last_map_addr = phys_pud_init(pud, __pa(start), __pa(end), page_size_mask); spin_lock(&init_mm.page_table_lock);