kcore: fix /proc/kcore's stat.st_size

In 9063c61fd5cbd ("x86, 64-bit: Clean up user address masking") Linus
fixed the wrong size of /proc/kcore problem.

But its size still looks insane, since it never equals the size of
physical memory.

Signed-off-by: WANG Cong <amwang@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Tao Ma <tao.ma@oracle.com>
Cc: <mtk.manpages@gmail.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
index f06f45b421810b4d13069b65f06782daa246e55c..0cf8a24cf6c300a6f1b59c6931e6a71f166aef68 100644 (file)
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -374,9 +374,6 @@ read_kcore(struct file *file, char __user *buffer, size_t buflen, loff_t *fpos)
 static int __init proc_kcore_init(void)
 {
        proc_root_kcore = proc_create("kcore", S_IRUSR, NULL, &proc_kcore_operations);
-       if (proc_root_kcore)
-               proc_root_kcore->size =
-                               (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
        return 0;
 }
 module_init(proc_kcore_init);