From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754586Ab2JIX7F (ORCPT ); Tue, 9 Oct 2012 19:59:05 -0400 Received: from acsinet15.oracle.com ([141.146.126.227]:49910 "EHLO acsinet15.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752370Ab2JIX6y (ORCPT ); Tue, 9 Oct 2012 19:58:54 -0400 From: Yinghai Lu To: Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Jacob Shin , Tejun Heo Cc: Stefano Stabellini , linux-kernel@vger.kernel.org, Yinghai Lu Subject: [PATCH 7/7] x86, mm: Remove early_memremap workaround for page table accessing Date: Tue, 9 Oct 2012 16:58:35 -0700 Message-Id: <1349827115-16600-8-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.7.7 In-Reply-To: <1349827115-16600-1-git-send-email-yinghai@kernel.org> References: <1349827115-16600-1-git-send-email-yinghai@kernel.org> X-Source-IP: ucsinet21.oracle.com [156.151.31.93] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Not needed that anymore after patches include premaping page table buf and not clear initial page table wrongly. Signed-off-by: Yinghai Lu --- arch/x86/mm/init_64.c | 38 ++++---------------------------------- 1 files changed, 4 insertions(+), 34 deletions(-) diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index 7dfa69b..4e6873f 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -340,36 +340,12 @@ static __ref void *alloc_low_page(unsigned long *phys) } else pfn = pgt_buf_end++; - adr = early_memremap(pfn * PAGE_SIZE, PAGE_SIZE); + adr = __va(pfn * PAGE_SIZE); clear_page(adr); *phys = pfn * PAGE_SIZE; return adr; } -static __ref void *map_low_page(void *virt) -{ - void *adr; - unsigned long phys, left; - - if (after_bootmem) - return virt; - - phys = __pa(virt); - left = phys & (PAGE_SIZE - 1); - adr = early_memremap(phys & PAGE_MASK, PAGE_SIZE); - adr = (void *)(((unsigned long)adr) | left); - - return adr; -} - -static __ref void unmap_low_page(void *adr) -{ - if (after_bootmem) - return; - - early_iounmap((void *)((unsigned long)adr & PAGE_MASK), PAGE_SIZE); -} - static unsigned long __meminit phys_pte_init(pte_t *pte_page, unsigned long addr, unsigned long end, pgprot_t prot) @@ -441,10 +417,9 @@ phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end, if (pmd_val(*pmd)) { if (!pmd_large(*pmd)) { spin_lock(&init_mm.page_table_lock); - pte = map_low_page((pte_t *)pmd_page_vaddr(*pmd)); + pte = (pte_t *)pmd_page_vaddr(*pmd); last_map_addr = phys_pte_init(pte, address, end, prot); - unmap_low_page(pte); spin_unlock(&init_mm.page_table_lock); continue; } @@ -480,7 +455,6 @@ phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end, pte = alloc_low_page(&pte_phys); last_map_addr = phys_pte_init(pte, address, end, new_prot); - unmap_low_page(pte); spin_lock(&init_mm.page_table_lock); pmd_populate_kernel(&init_mm, pmd, __va(pte_phys)); @@ -515,10 +489,9 @@ phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end, if (pud_val(*pud)) { if (!pud_large(*pud)) { - pmd = map_low_page(pmd_offset(pud, 0)); + pmd = pmd_offset(pud, 0); last_map_addr = phys_pmd_init(pmd, addr, end, page_size_mask, prot); - unmap_low_page(pmd); __flush_tlb_all(); continue; } @@ -555,7 +528,6 @@ phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end, pmd = alloc_low_page(&pmd_phys); last_map_addr = phys_pmd_init(pmd, addr, end, page_size_mask, prot); - unmap_low_page(pmd); spin_lock(&init_mm.page_table_lock); pud_populate(&init_mm, pud, __va(pmd_phys)); @@ -591,17 +563,15 @@ kernel_physical_mapping_init(unsigned long start, next = end; if (pgd_val(*pgd)) { - pud = map_low_page((pud_t *)pgd_page_vaddr(*pgd)); + pud = (pud_t *)pgd_page_vaddr(*pgd); last_map_addr = phys_pud_init(pud, __pa(start), __pa(end), page_size_mask); - unmap_low_page(pud); continue; } pud = alloc_low_page(&pud_phys); last_map_addr = phys_pud_init(pud, __pa(start), __pa(next), page_size_mask); - unmap_low_page(pud); spin_lock(&init_mm.page_table_lock); pgd_populate(&init_mm, pgd, __va(pud_phys)); -- 1.7.7