From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx114.postini.com [74.125.245.114]) by kanga.kvack.org (Postfix) with SMTP id 88CA86B0083 for ; Thu, 17 May 2012 06:55:04 -0400 (EDT) MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: TEXT/PLAIN Received: from euspt1 ([210.118.77.13]) by mailout3.w1.samsung.com (Sun Java(tm) System Messaging Server 6.3-8.04 (built Jul 29 2009; 32bit)) with ESMTP id <0M450068GYAG6D40@mailout3.w1.samsung.com> for linux-mm@kvack.org; Thu, 17 May 2012 11:54:16 +0100 (BST) Received: from ubuntu.arm.acom ([106.210.236.191]) by spt1.w1.samsung.com (iPlanet Messaging Server 5.2 Patch 2 (built Jul 14 2004)) with ESMTPA id <0M4500MKCYBFX2@spt1.w1.samsung.com> for linux-mm@kvack.org; Thu, 17 May 2012 11:55:02 +0100 (BST) Date: Thu, 17 May 2012 12:54:43 +0200 From: Marek Szyprowski Subject: [PATCHv2 2/4] mm: vmalloc: export find_vm_area() function In-reply-to: <1337252085-22039-1-git-send-email-m.szyprowski@samsung.com> Message-id: <1337252085-22039-3-git-send-email-m.szyprowski@samsung.com> References: <1337252085-22039-1-git-send-email-m.szyprowski@samsung.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-arm-kernel@lists.infradead.org, linaro-mm-sig@lists.linaro.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: Marek Szyprowski , Kyungmin Park , Arnd Bergmann , Russell King - ARM Linux , Chunsang Jeong , Krishna Reddy , Konrad Rzeszutek Wilk , Hiroshi Doyu , Subash Patel find_vm_area() function is usefull for other core subsystems (like dma-mapping) to get access to vm_area internals. Signed-off-by: Marek Szyprowski Reviewed-by: Kyungmin Park --- include/linux/vmalloc.h | 1 + mm/vmalloc.c | 10 +++++++++- 2 files changed, 10 insertions(+), 1 deletion(-) diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h index 2e28f4d..6071e91 100644 --- a/include/linux/vmalloc.h +++ b/include/linux/vmalloc.h @@ -93,6 +93,7 @@ extern struct vm_struct *__get_vm_area_caller(unsigned long size, unsigned long start, unsigned long end, const void *caller); extern struct vm_struct *remove_vm_area(const void *addr); +extern struct vm_struct *find_vm_area(const void *addr); extern int map_vm_area(struct vm_struct *area, pgprot_t prot, struct page ***pages); diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 8bc7f3ef..8cb7f22 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -1402,7 +1402,15 @@ struct vm_struct *get_vm_area_caller(unsigned long size, unsigned long flags, -1, GFP_KERNEL, caller); } -static struct vm_struct *find_vm_area(const void *addr) +/** + * find_vm_area - find a continuous kernel virtual area + * @addr: base address + * + * Search for the kernel VM area starting at @addr, and return it. + * It is up to the caller to do all required locking to keep the returned + * pointer valid. + */ +struct vm_struct *find_vm_area(const void *addr) { struct vmap_area *va; -- 1.7.10.1 -- 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 internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org