On Thu, Dec 10, 2015 at 01:45:09PM -0800, Kees Cook wrote: > > but generally you need ->f_lock. And in situations where the bit can > > go only off->on, check it lockless, skip the whole thing entirely if it's > > already set and grab the spinlock otherwise. > > And I can take f_lock safely under mmap_sem?
Are you asking whether it's safe to take a spinlock under an rwsem? -- 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/
