linux-kernel - [PATCH] mm: page_alloc: pass PFN to __free_pages

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Date:	Fri, 1 May 2015 10:20:31 +0100
From:	Mel Gorman <mgorman@...e.de>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Nathan Zimmer <nzimmer@....com>,
	Dave Hansen <dave.hansen@...el.com>,
	Waiman Long <waiman.long@...com>,
	Scott Norton <scott.norton@...com>,
	Daniel J Blueman <daniel@...ascale.com>,
	Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] mm: page_alloc: pass PFN to __free_pages_bootmem -fix

Stephen Rothwell reported the following

	Today's linux-next build (sparc defconfig) failed like this:

	mm/bootmem.c: In function 'free_all_bootmem_core':
	mm/bootmem.c:237:32: error: 'cur' undeclared (first use in this function)
	   __free_pages_bootmem(page++, cur++, 0);
                                ^
	Caused by commit "mm: page_alloc: pass PFN to __free_pages_bootmem".

He also merged a fix. The only difference in this version is one line is
moved so the final diff context is clearer. This is a fix to the mmotm
patch mm-page_alloc-pass-pfn-to-__free_pages_bootmem.patch

Signed-off-by: Mel Gorman <mgorman@...e.de>
---
 mm/bootmem.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/mm/bootmem.c b/mm/bootmem.c
index daf956bb4782..a23dd1934654 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -172,7 +172,7 @@ void __init free_bootmem_late(unsigned long physaddr, unsigned long size)
 static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
 {
 	struct page *page;
-	unsigned long *map, start, end, pages, count = 0;
+	unsigned long *map, start, end, pages, cur, count = 0;
 
 	if (!bdata->node_bootmem_map)
 		return 0;
@@ -214,7 +214,7 @@ static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
 			count += BITS_PER_LONG;
 			start += BITS_PER_LONG;
 		} else {
-			unsigned long cur = start;
+			cur = start;
 
 			start = ALIGN(start + 1, BITS_PER_LONG);
 			while (vec && cur != start) {
@@ -229,6 +229,7 @@ static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
 		}
 	}
 
+	cur = bdata->node_min_pfn;
 	page = virt_to_page(bdata->node_bootmem_map);
 	pages = bdata->node_low_pfn - bdata->node_min_pfn;
 	pages = bootmem_bootmap_pages(pages);
--
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