Re: uses of cmpxchg/xadd in spinlock.h and rwsem.h vs. CONFIG_M386

[Andreas Schwab]

"Jan Beulich" <JBeulich@xxxxxxxxxx> writes:

> While looking at a completely different issue I happened to grep for uses of
> xadd, and it would appear to me that there got uses added that would make
> a M386-configured SMP kernel die on an actual i386.
>
> Oh, for the rwsem case I see - it would use the RWSEM_GENERIC_SPINLOCK case
> when selecting M386. But I see nothing similar for the ticket spinlocks - am
> I overlooking something?

This came up before, see
<http://marc.info/?l=linux-kernel&m=123141659309208&w=2>.

Andreas.

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