On Wed, Jul 26, 2017 at 09:33:01AM -0400, Lance Richardson wrote: > > From: "Stephen Boyd" <sboyd@xxxxxxxxxxxxxx> > > I see sparse warning when I check a clk driver file in the kernel > > on a 32-bit ARM build. > > > > drivers/clk/sunxi/clk-sun6i-ar100.c:65:20: warning: cast truncates bits from > > constant value (3ffffffff becomes ffffffff) > > Hmm, it seems sparse is incorrectly taking ~0UL to be a 64-bit value > while BITS_PER_LONG is (correctly) evaluated to be 32. > > #define GENMASK(h, l) \ > (((~0UL) << (l)) & (~0UL >> (BITS_PER_LONG - 1 - (h)))) It's the kernel CHECKFLAGS that should be using -m32/-m64 if built on a machine with a different wordsize tht the arch. I sent earlier a patch for ARM, I just forgot to CC the mailing list here. -- Luc -- To unsubscribe from this list: send the line "unsubscribe linux-sparse" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
