Messages in this thread | | | Date | Wed, 11 Nov 2015 14:01:47 -0500 (EST) | Subject | Re: [PATCH 2/2] arm64: bpf: add BPF XADD instruction | From | David Miller <> |
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From: Alexei Starovoitov <alexei.starovoitov@gmail.com> Date: Wed, 11 Nov 2015 10:11:33 -0800
> bpf_xadd was never meant to be __sync_fetch_and_add equivalent. > From the day one it meant to be atomic_add() as kernel does it.
+1
> I did piggy back on __sync in the llvm backend because it was the quick > and dirty way to move forward. > In retrospect I should have introduced a clean intrinstic for that instead, > but it's not too late to do it now. user space we can change at any time > unlike kernel.
+1
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