Re: [PATCH] [2.5] asm-generic/atomic.h and changes to arm, parisc, mips, m68k, sh, cris to use it

David Woodhouse (dwmw2@infradead.org)
Mon, 12 Aug 2002 12:16:48 +0100

alan@lxorguk.ukuu.org.uk said:
> Possibly not - volatile doesnt guarantee the compiler won't do
> x = 1
> add *p into x
> store x into *p

Er, AIUI 'volatile' guarantees that '*p++' will do precisely that. It's a
load, an add and a store, and the rules about volatile mean that the load
and the store _must_ be separate.

--
dwmw2




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