On Thu, Apr 17, 2014 at 11:12:03PM +0100, Al Viro wrote: > * *KERNEL* vfsmounts; anything without MNT_INTERNAL is fair game > as far as ordering of fs shutdown is concerned. If it wasn't MNT_INTERNAL, > and we'd done mntput() before destroying some data structures needed for
s/before/just before/, of course ;-) > fs shutdown, we had been fucked anyway - no warranties that mntput() had > been the final one. Moreover, that means going through kern_unmount() or > simple_release_fs(). Which is trivially dealt with by providing > mntput_sync(mnt) that *will* wait and using it in those two. Again, if > we have an extra reference (e.g. stuffed into a struct file, etc.) - > we can't rely on mntput() being final. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
