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authorHeiko Carstens <heiko.carstens@de.ibm.com>2010-02-26 22:37:42 +0100
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2010-02-26 22:37:31 +0100
commitd96221ab1e7d86dc0d4666466979117cd1915386 (patch)
treeff3283841e7419226878a70f440d09d388bfe0c9 /arch/s390/mm
parentb8e660b83d505148c83ddc6d5ba69c29d0eab1e3 (diff)
downloadlinux-linaro-android-d96221ab1e7d86dc0d4666466979117cd1915386.tar.gz
[S390] free_initmem: reduce code duplication
free_initmem() and free_initrd_mem() are nearly identical. So make them call a common function. Also fixes a bug: if the initrd wouldn't start on a page boundary also memory after the initrd would be initialized with the poison value. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/mm')
-rw-r--r--arch/s390/mm/init.c33
1 files changed, 17 insertions, 16 deletions
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index 76564795222..d5865e4024c 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -143,33 +143,34 @@ void kernel_map_pages(struct page *page, int numpages, int enable)
}
#endif
-void free_initmem(void)
+void free_init_pages(char *what, unsigned long begin, unsigned long end)
{
- unsigned long addr;
+ unsigned long addr = begin;
- addr = (unsigned long)(&__init_begin);
- for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
+ 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, POISON_FREE_INITMEM, PAGE_SIZE);
+ memset((void *)(addr & PAGE_MASK), POISON_FREE_INITMEM,
+ PAGE_SIZE);
free_page(addr);
totalram_pages++;
- }
- printk ("Freeing unused kernel memory: %ldk freed\n",
- ((unsigned long)&__init_end - (unsigned long)&__init_begin) >> 10);
+ }
+ 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);
}
#ifdef CONFIG_BLK_DEV_INITRD
void free_initrd_mem(unsigned long start, unsigned long end)
{
- if (start < end)
- printk ("Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
- for (; start < end; start += PAGE_SIZE) {
- ClearPageReserved(virt_to_page(start));
- init_page_count(virt_to_page(start));
- free_page(start);
- totalram_pages++;
- }
+ free_init_pages("initrd memory", start, end);
}
#endif