[PATCH v2, part1 19/29] mm/s390: use common help functions to free reserved pages

[Jiang Liu]

Use common help functions to free reserved pages.

Signed-off-by: Jiang Liu <jiang....@huawei.com>
Cc: Martin Schwidefsky <schwidef...@de.ibm.com>
Cc: Heiko Carstens <heiko.carst...@de.ibm.com>
---
 arch/s390/mm/init.c |   35 ++++++-----------------------------
 1 file changed, 6 insertions(+), 29 deletions(-)

diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index 49ce6bb..70bda9e 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -42,11 +42,10 @@ pgd_t swapper_pg_dir[PTRS_PER_PGD] 
__attribute__((__aligned__(PAGE_SIZE)));
 unsigned long empty_zero_page, zero_page_mask;
 EXPORT_SYMBOL(empty_zero_page);
 
-static unsigned long __init setup_zero_pages(void)
+static void __init setup_zero_pages(void)
 {
        struct cpuid cpu_id;
        unsigned int order;
-       unsigned long size;
        struct page *page;
        int i;
 
@@ -75,14 +74,11 @@ static unsigned long __init setup_zero_pages(void)
        page = virt_to_page((void *) empty_zero_page);
        split_page(page, order);
        for (i = 1 << order; i > 0; i--) {
-               SetPageReserved(page);
+               mark_page_reserved(page);
                page++;
        }
 
-       size = PAGE_SIZE << order;
-       zero_page_mask = (size - 1) & PAGE_MASK;
-
-       return 1UL << order;
+       zero_page_mask = ((PAGE_SIZE << order) - 1) & PAGE_MASK;
 }
 
 /*
@@ -139,7 +135,7 @@ void __init mem_init(void)
 
        /* this will put all low memory onto the freelists */
        totalram_pages += free_all_bootmem();
-       totalram_pages -= setup_zero_pages();   /* Setup zeroed pages. */
+       setup_zero_pages();     /* Setup zeroed pages. */
 
        reservedpages = 0;
 
@@ -158,34 +154,15 @@ void __init mem_init(void)
               PFN_ALIGN((unsigned long)&_eshared) - 1);
 }
 
-void free_init_pages(char *what, unsigned long begin, unsigned long end)
-{
-       unsigned long addr = begin;
-
-       if (begin >= end)
-               return;
-       for (; addr < end; addr += PAGE_SIZE) {
-               ClearPageReserved(virt_to_page(addr));
-               init_page_count(virt_to_page(addr));
-               memset((void *)(addr & PAGE_MASK), POISON_FREE_INITMEM,
-                      PAGE_SIZE);
-               free_page(addr);
-               totalram_pages++;
-       }
-       printk(KERN_INFO "Freeing %s: %luk freed\n", what, (end - begin) >> 10);
-}
-
 void free_initmem(void)
 {
-       free_init_pages("unused kernel memory",
-                       (unsigned long)&__init_begin,
-                       (unsigned long)&__init_end);
+       free_initmem_default(0);
 }
 
 #ifdef CONFIG_BLK_DEV_INITRD
 void __init free_initrd_mem(unsigned long start, unsigned long end)
 {
-       free_init_pages("initrd memory", start, end);
+       free_reserved_area(start, end, POISON_FREE_INITMEM, "initrd");
 }
 #endif
 
-- 
1.7.9.5

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