From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail172.messagelabs.com (mail172.messagelabs.com [216.82.254.3]) by kanga.kvack.org (Postfix) with ESMTP id DED576B00EC for ; Mon, 24 Jan 2011 17:56:25 -0500 (EST) From: Jeremy Fitzhardinge Subject: [PATCH 5/9] vmalloc: use apply_to_page_range_batch() for vunmap_page_range() Date: Mon, 24 Jan 2011 14:56:03 -0800 Message-Id: <334c14835ef823ce665eeebf6aad467064f47e47.1295653400.git.jeremy.fitzhardinge@citrix.com> In-Reply-To: References: In-Reply-To: References: Sender: owner-linux-mm@kvack.org To: Andrew Morton Cc: Haavard Skinnemoen , Linux-MM , Linux Kernel Mailing List , Nick Piggin , Xen-devel , Jeremy Fitzhardinge List-ID: From: Jeremy Fitzhardinge There's no need to open-code it when there's helpful utility function to do the job. Signed-off-by: Jeremy Fitzhardinge Cc: Nick Piggin --- mm/vmalloc.c | 53 +++++++++-------------------------------------------- 1 files changed, 9 insertions(+), 44 deletions(-) diff --git a/mm/vmalloc.c b/mm/vmalloc.c index c06dc1e..e99aa3b 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -33,59 +33,24 @@ /*** Page table manipulation functions ***/ -static void vunmap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end) +static int vunmap_pte(pte_t *pte, unsigned count, + unsigned long addr, void *data) { - pte_t *pte; - - pte = pte_offset_kernel(pmd, addr); - do { + while (count--) { pte_t ptent = *pte; - WARN_ON(!pte_none(ptent) && !pte_present(ptent)); - pte_clear(&init_mm, addr, pte); - } while (pte++, addr += PAGE_SIZE, addr != end); -} - -static void vunmap_pmd_range(pud_t *pud, unsigned long addr, unsigned long end) -{ - pmd_t *pmd; - unsigned long next; - pmd = pmd_offset(pud, addr); - do { - next = pmd_addr_end(addr, end); - if (pmd_none_or_clear_bad(pmd)) - continue; - vunmap_pte_range(pmd, addr, next); - } while (pmd++, addr = next, addr != end); -} + WARN_ON(!pte_none(ptent) && !pte_present(ptent)); -static void vunmap_pud_range(pgd_t *pgd, unsigned long addr, unsigned long end) -{ - pud_t *pud; - unsigned long next; + pte_clear(&init_mm, addr, pte++); + addr += PAGE_SIZE; + } - pud = pud_offset(pgd, addr); - do { - next = pud_addr_end(addr, end); - if (pud_none_or_clear_bad(pud)) - continue; - vunmap_pmd_range(pud, addr, next); - } while (pud++, addr = next, addr != end); + return 0; } static void vunmap_page_range(unsigned long addr, unsigned long end) { - pgd_t *pgd; - unsigned long next; - - BUG_ON(addr >= end); - pgd = pgd_offset_k(addr); - do { - next = pgd_addr_end(addr, end); - if (pgd_none_or_clear_bad(pgd)) - continue; - vunmap_pud_range(pgd, addr, next); - } while (pgd++, addr = next, addr != end); + apply_to_page_range_batch(&init_mm, addr, end - addr, vunmap_pte, NULL); } static int vmap_pte_range(pmd_t *pmd, unsigned long addr, -- 1.7.3.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: email@kvack.org