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>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 6 deletions

diff --git a/kernel/kexec.c b/kernel/kexec.c
index ffd4e111fd67..b19181d44201 100644
--- 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)