Messages in this thread | | | From | Linus Torvalds <> | Date | Thu, 27 Jul 2023 12:39:45 -0700 | Subject | Re: [PATCH 0/2] fix vma->anon_vma check for per-VMA locking; fix anon_vma memory ordering |
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On Thu, 27 Jul 2023 at 12:10, Nadav Amit <nadav.amit@gmail.com> wrote: > > Interesting. I wonder if you considered adding to READ_ONCE() something > like: > > asm volatile("" : "+g" (x) ); > > So later loads (such as baz = *ptr) would reload the updated value.
Not necessarily a bad idea. Although I suspect you'd want to add *two* of them - on either side - to make sure any previous loads wouldn't be moved around it either.
Linus
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