On Tue, Sep 03, 2019 at 01:37:19PM +0100, Al Viro wrote: > On Tue, Sep 03, 2019 at 12:21:36AM -0400, Qian Cai wrote: > > The linux-next commit "fs/namei.c: keep track of nd->root refcount status” [1] causes boot panic on all > > architectures here on today’s linux-next (0902). Reverted it will fix the issue. > > <swearing> > > OK, I see what's going on. Incremental to be folded in: ... or, better yet, diff --git a/include/linux/namei.h b/include/linux/namei.h index 20ce2f917ef4..397a08ade6a2 100644 --- a/include/linux/namei.h +++ b/include/linux/namei.h @@ -37,7 +37,7 @@ enum {LAST_NORM, LAST_ROOT, LAST_DOT, LAST_DOTDOT, LAST_BIND}; #define LOOKUP_NO_REVAL 0x0080 #define LOOKUP_JUMPED 0x1000 #define LOOKUP_ROOT 0x2000 -#define LOOKUP_ROOT_GRABBED 0x4000 +#define LOOKUP_ROOT_GRABBED 0x0008 extern int path_pts(struct path *path); to avoid breaking out-of-tree stuff for now good reason. Folded and pushed out.