On Mon, Mar 19, 2018 at 06:10:13PM -0700, Randy Dunlap wrote: > On 03/19/2018 04:33 PM, kbuild test robot wrote: > > tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master > > branch HEAD: a5444cde9dc2120612e50fc5a56c975e67a041fb Add linux-next specific files for 20180319 > > > > Regressions in current branch: > > > > ERROR: "__sw_hweight8" [drivers/net/wireless/mediatek/mt76/mt76.ko] undefined! > > Well, the driver could do: > > drivers/net/wireless/mediatek/mt76/Kconfig: > > + select GENERIC_HWEIGHT > > but maybe arch/ix64/Kconfig (where the build error is) could be asked to do: > > config GENERIC_HWEIGHT > def_bool y > > like 23 other $arch-es do. Aha, ia64 provides inline functions via some > a twisty maze of header files. > > Tony, Fengguang, what header(s) should be used to reach __arch_hweight8()? Looks like a few architectures have their own __arch_hweight8 (alpha, blackfin, ia64, mips, powerpc, sparc, tile and x86) everyone except x86 puts them in <asm/bitops.h> ... x86 has a <asm/arch_hweight.h> Likely that the best solution would be to match how x86 does this and move the hweight defines out of bitops.h. But it all seems very messy :-( -Tony
