Messages in this thread | | | Date | Fri, 9 Aug 2002 00:27:39 +0200 (CEST) | From | Roman Zippel <> | Subject | Re: [PATCH] [2.5] asm-generic/atomic.h and changes to arm, parisc, mips, m68k, sh, cris to use it |
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Hi,
On 9 Aug 2002, Luca Barbieri wrote:
> - Didn't implement atomic_{add,sub,inc,dec}_return. This is currently > not used in the generic kernel but it can be useful.
m68k has a cmpxchg like instruction, which can be used for that.
> - Had inline assembly for things the compiler should be able to generate > on its own
The compiler can cache the value in a register, the assembly forces that into memory. __ARCH_ATOMIC_HAVE_MEMORY_OPERANDS won't work because of that.
bye, Roman
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