My code must be able to run in SRB mode and with locks held. I have a situation where I need to serialize processing and cannot use CDS because the two addresses being updated cannot be next to each other (because I use CDS with these two addresses with other addresses). I have attempted to use a combination of CS instructions to resolve this problem but it does not work. I know this will work if I use a CMS lock but I am concerned about affecting the whole system. Any advice?
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