From 0d4c36a9b6ab6b15851f60956d901a3c53574ea8 Mon Sep 17 00:00:00 2001 From: KAMEZAWA Hiroyuki Date: Tue, 22 Sep 2009 16:45:52 -0700 Subject: [PATCH] /proc/kcore: update stat.st_size after memory hotplug After memory hotplug (or other events in future), kcore size can be modified. To update inode->i_size, we have to know inode/dentry but we can't get it from inside /proc directly. But considerinyg memory hotplug, kcore image is updated only when it's opened. Then, updating inode->i_size at open() is enough. Signed-off-by: KAMEZAWA Hiroyuki Acked-by: WANG Cong Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/proc/kcore.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c index 3d0485c361c7..56013371f9f3 100644 --- a/fs/proc/kcore.c +++ b/fs/proc/kcore.c @@ -546,6 +546,11 @@ static int open_kcore(struct inode *inode, struct file *filp) return -EPERM; if (kcore_need_update) kcore_update_ram(); + if (i_size_read(inode) != proc_root_kcore->size) { + mutex_lock(&inode->i_mutex); + i_size_write(inode, proc_root_kcore->size); + mutex_unlock(&inode->i_mutex); + } return 0; } -- 2.20.1