Re: [PATCH v9 1/2] arch/*: Add CONFIG_ARCH_HAVE_CMPXCHG64

2018-05-16 Thread Christoph Hellwig
> +config ARCH_HAVE_CMPXCHG64 > + bool 64-bit architectures must support this as long is 64-bits wide. So this should have a default y if 64BIT which also means you only need to explicitly select in on 32-bit architectures that support 64-bit cmpxchg.

[PATCH v9 1/2] arch/*: Add CONFIG_ARCH_HAVE_CMPXCHG64

2018-05-15 Thread Bart Van Assche
The next patch in this series introduces a call to cmpxchg64() in the block layer core for those architectures on which this functionality is available. Make it possible to test whether cmpxchg64() is available by introducing CONFIG_ARCH_HAVE_CMPXCHG64. Signed-off-by: Bart Van Assche

Re: [PATCH v9 1/2] arch/*: Add CONFIG_ARCH_HAVE_CMPXCHG64

2018-05-15 Thread Bart Van Assche
On Tue, 2018-05-15 at 12:54 +1000, Michael Ellerman wrote: > Bart Van Assche writes: > > > > +--- > > +| arch |status| > > +--- > > +| alpha: | ok | > > +| arc: | TODO | > > +|

Re: [PATCH v9 1/2] arch/*: Add CONFIG_ARCH_HAVE_CMPXCHG64

2018-05-15 Thread Andrea Parri
Hi Bart, On Mon, May 14, 2018 at 11:46:33AM -0700, Bart Van Assche wrote: [...] > diff --git a/Documentation/features/locking/cmpxchg64/arch-support.txt > b/Documentation/features/locking/cmpxchg64/arch-support.txt > new file mode 100644 > index ..65b3290ce5d5 > --- /dev/null > +++

Re: [PATCH v9 1/2] arch/*: Add CONFIG_ARCH_HAVE_CMPXCHG64

2018-05-14 Thread Michael Ellerman
Hi Bart, Bart Van Assche writes: > ... > diff --git a/Documentation/features/locking/cmpxchg64/arch-support.txt > b/Documentation/features/locking/cmpxchg64/arch-support.txt > new file mode 100644 > index ..65b3290ce5d5 > --- /dev/null > +++

Re: [PATCH v9 1/2] arch/*: Add CONFIG_ARCH_HAVE_CMPXCHG64

2018-05-14 Thread Geert Uytterhoeven
Hi Bart, On Mon, May 14, 2018 at 10:42 PM, Bart Van Assche wrote: > On Mon, 2018-05-14 at 11:50 -0700, Max Filippov wrote: >> On Mon, May 14, 2018 at 11:46 AM, Bart Van Assche >> wrote: >> > The next patch in this series introduces a call to

Re: [PATCH v9 1/2] arch/*: Add CONFIG_ARCH_HAVE_CMPXCHG64

2018-05-14 Thread Bart Van Assche
On Mon, 2018-05-14 at 11:50 -0700, Max Filippov wrote: > On Mon, May 14, 2018 at 11:46 AM, Bart Van Assche > wrote: > > The next patch in this series introduces a call to cmpxchg64() > > in the block layer core for those architectures on which this > > functionality is

Re: [PATCH v9 1/2] arch/*: Add CONFIG_ARCH_HAVE_CMPXCHG64

2018-05-14 Thread Max Filippov
On Mon, May 14, 2018 at 11:46 AM, Bart Van Assche wrote: > The next patch in this series introduces a call to cmpxchg64() > in the block layer core for those architectures on which this > functionality is available. Make it possible to test whether > cmpxchg64() is

[PATCH v9 1/2] arch/*: Add CONFIG_ARCH_HAVE_CMPXCHG64

2018-05-14 Thread Bart Van Assche
The next patch in this series introduces a call to cmpxchg64() in the block layer core for those architectures on which this functionality is available. Make it possible to test whether cmpxchg64() is available by introducing CONFIG_ARCH_HAVE_CMPXCHG64. Signed-off-by: Bart Van Assche