Re: 2.6.9-rc1-mm4 sparc reiser4 build broken - undefined atomic_sub_and_test

[Hugh Dickins]

On Mon, 13 Sep 2004, Roman Zippel wrote:
> 
> So why not add the missing atomic_sub_and_test() (using simply 
> atomic_sub_return)?

sparc and s390 are not the only arches lacking atomic_sub_and_test.

Go ahead and send the patches changing all the arches that have it to
define __ARCH_HAS_ATOMIC_SUB_AND_TEST, and add asm-generic/atomic.h
for those that don't etc; but to me that seems like a waste of time -
unless Zam convinces us that Reiser4 will need every last ounce of
cpu on this particular line of code.

Hugh

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