mm,kexec: use common help functions to free reserved pages

Use common help functions to free reserved pages.

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Cc: Eric Biederman <ebiederm@xmission.com>
Reviewed-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/kernel/kexec.c b/kernel/kexec.c
index bddd3d7a74b688a1c9c2e68481b77363558124c7..be9539770f8228ba753c07fc363755de13f70da8 100644 (file)
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -1118,12 +1118,8 @@ void __weak crash_free_reserved_phys_range(unsigned long begin,
 {
        unsigned long addr;
 
-       for (addr = begin; addr < end; addr += PAGE_SIZE) {
-               ClearPageReserved(pfn_to_page(addr >> PAGE_SHIFT));
-               init_page_count(pfn_to_page(addr >> PAGE_SHIFT));
-               free_page((unsigned long)__va(addr));
-               totalram_pages++;
-       }
+       for (addr = begin; addr < end; addr += PAGE_SIZE)
+               free_reserved_page(pfn_to_page(addr >> PAGE_SHIFT));
 }
 
 int crash_shrink_memory(unsigned long new_size)