| Date | Fri, 3 Mar 2006 15:22:42 -0800 (PST) | From | Linus Torvalds <> | Subject | Re: 2.6.16-rc regression: m68k CONFIG_RMW_INSNS=n compile broken |
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On Sat, 4 Mar 2006, Adrian Bunk wrote: > > It seems the problem is that in the CONFIG_RMW_INSNS=n case, there's no > cmpxchg #define in include/asm-m68k/system.h required for the > atomic_add_unless #define in include/asm-m68k/atomic.h.
Hmm. It seems like it never has been there.. Do you know what brought this on? Was it Nick's RCU changes from "rcuref_dec_and_test()" to "atomic_dec_and_test()" and friends?
Judging by your error messages, I _think_ it's the "atomic_inc_not_zero()" that gets expanded to a cmpxchg() that simply doesn't exist on m68k and never has.
I guess we've never depended on cmpxchg before. Or am I missing something?
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