From: Ursula Braun <ubr...@linux.vnet.ibm.com> Date: Wed, 10 Aug 2016 15:44:00 +0200
> But there are still usages (and conn->rx_curs_confirmed is one of > them), where I need an 8-byte cursor field to be read and written > atomicaly, even though I do not care whether the write operation has > been beaten or not. But I do care that reading the cursor does not > return a partially updated cursor. Isn't xchg() a possible solution > in this case? Either the cpu supports 64-bit stores or it does not. xchg() and atomicity have absolutely nothing to do with this.
