linux-kernel - [PATCH v2, part1 08/29] mm/FRV: use common help functions to free reserved pages

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Date:	Sun, 10 Mar 2013 14:26:51 +0800
From:	Jiang Liu <liuj97@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>
Cc:	Jiang Liu <jiang.liu@...wei.com>,
	Wen Congyang <wency@...fujitsu.com>,
	Maciej Rutecki <maciej.rutecki@...il.com>,
	Chris Clayton <chris2553@...glemail.com>,
	"Rafael J . Wysocki" <rjw@...k.pl>, Mel Gorman <mgorman@...e.de>,
	Minchan Kim <minchan@...nel.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Michal Hocko <mhocko@...e.cz>,
	Jianguo Wu <wujianguo@...wei.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, David Howells <dhowells@...hat.com>
Subject: [PATCH v2, part1 08/29] mm/FRV: use common help functions to free reserved pages

Use common help functions to free reserved pages.

Signed-off-by: Jiang Liu <jiang.liu@...wei.com>
Cc: David Howells <dhowells@...hat.com>
---
 arch/frv/mm/init.c |   34 ++++------------------------------
 1 file changed, 4 insertions(+), 30 deletions(-)

diff --git a/arch/frv/mm/init.c b/arch/frv/mm/init.c
index 92e97b0..21b9290 100644
--- a/arch/frv/mm/init.c
+++ b/arch/frv/mm/init.c
@@ -122,7 +122,7 @@ void __init mem_init(void)
 #endif
 	int codek = 0, datak = 0;
 
-	/* this will put all memory onto the freelists */
+	/* this will put all low memory onto the freelists */
 	totalram_pages = free_all_bootmem();
 
 #ifdef CONFIG_MMU
@@ -132,11 +132,7 @@ void __init mem_init(void)
 
 #ifdef CONFIG_HIGHMEM
 	for (pfn = num_physpages - 1; pfn >= num_mappedpages; pfn--) {
-		struct page *page = &mem_map[pfn];
-
-		ClearPageReserved(page);
-		init_page_count(page);
-		__free_page(page);
+		__free_reserved_page(&mem_map[pfn]);
 		totalram_pages++;
 	}
 #endif
@@ -168,21 +164,7 @@ void __init mem_init(void)
 void free_initmem(void)
 {
 #if defined(CONFIG_RAMKERNEL) && !defined(CONFIG_PROTECT_KERNEL)
-	unsigned long start, end, addr;
-
-	start = PAGE_ALIGN((unsigned long) &__init_begin);	/* round up */
-	end   = ((unsigned long) &__init_end) & PAGE_MASK;	/* round down */
-
-	/* next to check that the page we free is not a partial page */
-	for (addr = start; addr < end; addr += PAGE_SIZE) {
-		ClearPageReserved(virt_to_page(addr));
-		init_page_count(virt_to_page(addr));
-		free_page(addr);
-		totalram_pages++;
-	}
-
-	printk("Freeing unused kernel memory: %ldKiB freed (0x%lx - 0x%lx)\n",
-	       (end - start) >> 10, start, end);
+	free_initmem_default(0);
 #endif
 } /* end free_initmem() */
 
@@ -193,14 +175,6 @@ void free_initmem(void)
 #ifdef CONFIG_BLK_DEV_INITRD
 void __init free_initrd_mem(unsigned long start, unsigned long end)
 {
-	int pages = 0;
-	for (; start < end; start += PAGE_SIZE) {
-		ClearPageReserved(virt_to_page(start));
-		init_page_count(virt_to_page(start));
-		free_page(start);
-		totalram_pages++;
-		pages++;
-	}
-	printk("Freeing initrd memory: %dKiB freed\n", (pages * PAGE_SIZE) >> 10);
+	free_reserved_area(start, end, 0, "initrd");
 } /* end free_initrd_mem() */
 #endif
-- 
1.7.9.5

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