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Re: [PATCH] coredump: Replace opencoded set_mask_bits()

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On Fri, Aug 07, 2015 at 08:14:03PM +0530, Vineet Gupta wrote:

> See, I have such a cmpxchg loop in ARC code - originally from Peter :-)
> arch/arc/kernel/smp.c. @ipi_data_ptr is NOT atomic_t
> 
> 	do {
> 		new = old = ACCESS_ONCE(*ipi_data_ptr);
> 		new |= 1U << msg;
> 	} while (cmpxchg(ipi_data_ptr, old, new) != old);
> 

Well, you'll have atomic_or() real soon now.
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[PATCH] coredump: Replace opencoded set_mask_bits() Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2015-08-07 10:20 +0200
  Re: [PATCH] coredump: Replace opencoded set_mask_bits() Oleg Nesterov <oleg@redhat.com> - 2015-08-07 14:00 +0200
    Re: [PATCH] coredump: Replace opencoded set_mask_bits() Vineet Gupta <vgupta@synopsys.com> - 2015-08-07 16:50 +0200
      Re: [PATCH] coredump: Replace opencoded set_mask_bits() Peter Zijlstra <peterz@infradead.org> - 2015-08-07 17:00 +0200
        Re: [PATCH] coredump: Replace opencoded set_mask_bits() Vineet Gupta <vgupta@synopsys.com> - 2015-08-07 17:40 +0200
          Re: [PATCH] coredump: Replace opencoded set_mask_bits() Peter Zijlstra <peterz@infradead.org> - 2015-08-07 17:50 +0200
            Re: [PATCH] coredump: Replace opencoded set_mask_bits() Vineet Gupta <vgupta@synopsys.com> - 2015-08-07 18:00 +0200
              Re: [PATCH] coredump: Replace opencoded set_mask_bits() Peter Zijlstra <peterz@infradead.org> - 2015-08-07 18:10 +0200

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