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 000000000000..65b3290ce5d5 > --- /dev/null > +++ b/Documentation/features/locking/cmpxchg64/arch-support.txt > @@ -0,0 +1,31 @@ > +# > +# Feature name: cmpxchg64 > +# Kconfig: ARCH_HAVE_CMPXCHG64 > +# description: arch supports the cmpxchg64() API > +# > + ----------------------- > + | arch |status| > + ----------------------- > + | alpha: | ok | > + | arc: | TODO | > + | arm: |!thumb| > + | arm64: | ok | > + | c6x: | TODO | > + | h8300: | TODO | > + | hexagon: | TODO | > + | ia64: | ok | > + | m68k: | ok | > + | microblaze: | TODO | > + | mips: |64-bit| > + | nios2: | TODO | > + | openrisc: | TODO | > + | parisc: | ok | > + | powerpc: |64-bit| > + | s390: | ok | > + | sh: | TODO | > + | sparc: | ok | > + | um: | TODO | > + | unicore32: | TODO | > + | x86: | ok | > + | xtensa: | ok | > + ----------------------- nds32 and riscv seem to be missing from the table. I'd also suggest sticking to the three entries documented in Documentation/features/arch-support.txt and using the header comment to provide any additional information. A script that refreshes the arch support status file in place (from the Kconfig files) is currently available in linux-next: c.f., Documentation/features/scripts/features-refresh.sh Andrea
