Messages in this thread |  | | Date | Mon, 10 Feb 2014 16:08:11 -0500 | From | Chris Metcalf <> | Subject | Re: [RFC][PATCH 0/5] arch: atomic rework |
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(+LKML again)
On 2/10/2014 3:57 PM, Peter Zijlstra wrote: > On Mon, Feb 10, 2014 at 03:50:04PM -0500, Chris Metcalf wrote: >> On 2/6/2014 8:52 AM, Peter Zijlstra wrote: >>> Its been compiled on everything I have a compiler for, however frv and >>> tile are missing because they're special and I was tired. >> So what's the specialness on tile? > Its not doing the atomic work in ASM but uses magic builtins or such. > > I got the list of magic funcs for tilegx, but didn't look into the 32bit > chips.
Oh, I see. The <asm/atomic.h> files on tile are already reasonably well-factored.
It's possible you could do better, but I think not by too much, other than possibly by using <asm-generic/atomic.h> for some of the common idioms like "subtraction is addition with a negative second argument", etc., which hasn't been done elsewhere.
-- Chris Metcalf, Tilera Corp. http://www.tilera.com
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