On Tue, Sep 01, 2020 at 02:30:51PM +0800, Alex Shi wrote: > seems there are couples archs can not do cmpxchg1 > So update the patch here. And it's easy to fix if more arch issue find here. > +/* > + * cmpxchg only support 32-bits operands on the following archs ARMv6, SPARC32 > + * sh2, XTENSA. > + */ > +#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_SH2) || \ > + defined(CONFIG_SPARC32) || defined(CONFIG_XTENSA) Looks like we need a HAVE_CMPXCHG_BYTE in Kconfig to parallel HAVE_CMPXCHG_DOUBLE.
