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SubjectRe: [uclinux-dist-devel] [GIT PULL] Blackfin updates for 3.11
On Tue, Jul 16, 2013 at 1:49 AM, Linus Torvalds
<> wrote:
> On Mon, Jul 15, 2013 at 10:28 AM, Geert Uytterhoeven
> <> wrote:
>> but the first one is non-trivial: using xchg() on atomic_t is a bit gross...
> It's also broken. There's no guarantee that an "atomic_t" is just a
> value. Now, the old sparc32 stuff (which hid lock bits in atomic_t)
> may be gone, but it's still the case that atomic_t may not actually
> work with xchg.
> (In *practice* it works on normal architectures, so I'm not saying
> that we don't have it, but it's a bug if we do).
> There are "atomic_xchg()" and "atomic_xchg64()" functions that are supported.
I'll send a patch to fix it.
> Linus

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