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Re: autoconf stalls while checking "atomic builtins for 64 bit data types"

On 2017-10-19 2:05 AM, Helge Deller wrote:
+ checking whether the compiler provides atomic builtins for 64 bit data types... yes

Although the 32-bit parisc kernel now provides 64-bit atomics, I'd suggest
to stay on "native word width" when writing locking functions.
That means, on a 32-bit kernel ideally 32-bit atomics should be used.
We believe that our 64-bit atomic functions do work, but
there might be cornercases where it doesn't work 100% reliable.

Yes, there is a semaphore and interrupts are disabled, but the loads are not atomic from
a memory standpoint.  So, I agree with Helge's comment.


John David Anglin  dave.anglin@bell.net

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