Patch "asm-generic/bitops/lock.h: Rewrite using atomic_fetch_" causes kernel crash

On 08/30/2018 01:45 PM, Peter Zijlstra wrote:

quoted

Indeed this is the mother of all issues, I tried and system is clearly hosed with
and works after.
What's amazing is the commit 4aef66c8ae9 which introduced it is from 2016 ;-)
Back then we had a retry branch with backoff stuff which I'd reverted for new
cores and the merge conflict somehow missed it.

@PeterZ I'll create a patch with you as author ? do I need any formal sign offs,
acks etc ?

Well, Will spotted it, give authorship to him, you have my ack per the
above.

Oops, sorry for the mixup. I have him as author now and pushed to ARC for-curr
(will trickle into linux-next eventually).

FWIW, also ACK on Will's patch to switch you over to asm-generic bitops
entirely.

Yeah I'll get it to that and your's after the clear_bit_lock stuff - sorry for
hijacking this thread to that topic now

-Vineet