On Fri, Mar 16, 2018 at 09:48:44AM -0600, Logan Gunthorpe wrote: > Warnings of the form: > > lib/iomap.c:84:9: warning: cast to restricted __be16 > > Are found when running sparse checker with: > > make C=2 CF=-D__CHECK_ENDIAN__ > > This patch casts them with __force to suppress the warnings. Hi, it looks correct but if you should explain why the warning is not a valid one. Once done, you can then explain what problem you have fixed instead of saying you suppressed a warning. > Also, it looks like the wrong conversion function was used in I would suggest to split the patch in two since it does two different things which should have their own explanation. > diff --git a/lib/iomap.c b/lib/iomap.c > index 541d926da95e..a05d9fa21794 100644 > --- a/lib/iomap.c > +++ b/lib/iomap.c > @@ -106,8 +106,10 @@ EXPORT_SYMBOL(ioread32be); > #endif > > #ifndef mmio_write16be > -#define mmio_write16be(val,port) __raw_writew(be16_to_cpu(val),port) > -#define mmio_write32be(val,port) __raw_writel(be32_to_cpu(val),port) > +#define mmio_write16be(val, port) \ > + __raw_writew((u16 __force)cpu_to_be16(val), port) > +#define mmio_write32be(val, port) \ > + __raw_writel((u32 __force)cpu_to_be32(val), port) > #endif I think that in this sort of replacement, it's better to not split the lines (even if larger than 80, that's it). -- Luc Van Oostenryck
