From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 22 Nov 2005 18:07:44 +0000 Subject: [PATCH 2/2] sparse provide pfn_to_nid Message-ID: <20051122180744.GA10861@shadowen.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline From: Andy Whitcroft Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton Cc: Andy Whitcroft , kravetz@us.ibm.com, anton@samba.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: Before SPARSEMEM is initialised we cannot provide an efficient pfn_to_nid() implmentation; before initialisation is complete we use early_pfn_to_nid() to provide location information. Until recently there was no non-init user of this functionality. Provide a post init pfn_to_nid() implementation. Note that this implmentation assumes that the pfn passed has been validated with pfn_valid(). The current single user of this function already has this check. Signed-off-by: Andy Whitcroft --- mmzone.h | 6 +++++- 1 files changed, 5 insertions(+), 1 deletion(-) diff -upN reference/include/linux/mmzone.h current/include/linux/mmzone.h --- reference/include/linux/mmzone.h +++ current/include/linux/mmzone.h @@ -606,7 +606,11 @@ static inline int pfn_valid(unsigned lon * this restriction. */ #ifdef CONFIG_NUMA -#define pfn_to_nid early_pfn_to_nid +#define pfn_to_nid(pfn) \ +({ \ + unsigned long __pfn_to_nid_pfn = (pfn); \ + page_to_nid(pfn_to_page(__pfn_to_nid_pfn)); \ +}) #else #define pfn_to_nid(pfn) (0) #endif -- 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/ . Don't email: email@kvack.org