diff options
| -rw-r--r-- | arch/x86/mm/init_32.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c index 1dd6b6334dc..1570a822c18 100644 --- a/arch/x86/mm/init_32.c +++ b/arch/x86/mm/init_32.c @@ -1214,18 +1214,21 @@ void mark_rodata_ro(void) void free_init_pages(char *what, unsigned long begin, unsigned long end) { -#ifdef CONFIG_DEBUG_PAGEALLOC + unsigned long addr = begin; + + if (addr >= end) + return; + /* * If debugging page accesses then do not free this memory but * mark them not present - any buggy init-section access will * create a kernel page fault: */ +#ifdef CONFIG_DEBUG_PAGEALLOC printk(KERN_INFO "debug: unmapping init memory %08lx..%08lx\n", begin, PAGE_ALIGN(end)); set_memory_np(begin, (end - begin) >> PAGE_SHIFT); #else - unsigned long addr; - /* * We just marked the kernel text read only above, now that * we are going to free part of that, we need to make that @@ -1233,14 +1236,16 @@ void free_init_pages(char *what, unsigned long begin, unsigned long end) */ set_memory_rw(begin, (end - begin) >> PAGE_SHIFT); - for (addr = begin; addr < end; addr += PAGE_SIZE) { + printk(KERN_INFO "Freeing %s: %luk freed\n", what, (end - begin) >> 10); + + 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_SIZE-1)), + POISON_FREE_INITMEM, PAGE_SIZE); free_page(addr); totalram_pages++; } - printk(KERN_INFO "Freeing %s: %luk freed\n", what, (end - begin) >> 10); #endif } |