From: Al Viro Date: Sun, 29 May 2016 17:49:56 +0000 (-0400) Subject: undo "fs: allow d_instantiate to be called with negative parent dentry" X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=2853908a59603118f854b813da055c26257dfa4f;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git undo "fs: allow d_instantiate to be called with negative parent dentry" Background: spufs used to mangle the order in which it had been building dentry trees. It was broken in a lot of ways, but most of them required the right timing to trigger until an fsnotify change had added one more - the one that was always triggered. Unfortunately, insteading of fixing their long-standing bug the spufs folks had chosen to paper over the fsnotify trigger. Eventually said bug had been spotted and killed off, but the pointless check in fsnotify has remained, complete with the implication that one *could* do that kind of crap. Again, a parent of any dentry should always be positive. Any code can rely upon that and anything violating that assert is a bug, *not* something to be accomodated. Signed-off-by: Al Viro --- diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h index 29f917517299..d188a107c562 100644 --- a/include/linux/fsnotify_backend.h +++ b/include/linux/fsnotify_backend.h @@ -281,7 +281,7 @@ static inline void __fsnotify_update_dcache_flags(struct dentry *dentry) * us with the new state. */ parent = dentry->d_parent; - if (parent->d_inode && fsnotify_inode_watches_children(parent->d_inode)) + if (fsnotify_inode_watches_children(parent->d_inode)) dentry->d_flags |= DCACHE_FSNOTIFY_PARENT_WATCHED; else dentry->d_flags &= ~DCACHE_FSNOTIFY_PARENT_WATCHED;