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.
Dave
--
John David Anglin [email protected]
