On Fri, Jan 6, 2017 at 1:52 AM, Mao Wenan <maowe...@huawei.com> wrote: > Relax ordering(RO) is one feature of 82599 NIC, to enable this feature can > enhance the performance for some cpu architecure, such as SPARC and so on. > Currently it only supports one special cpu architecture(SPARC) in 82599 > driver to enable RO feature, this is not very common for other cpu > architecture > which really needs RO feature. > This patch add one common config CONFIG_ARCH_WANT_RELAX_ORDER to set RO > feature, > and should define CONFIG_ARCH_WANT_RELAX_ORDER in sparc Kconfig firstly. > > Signed-off-by: Mao Wenan <maowe...@huawei.com> > --- > arch/sparc/Kconfig | 1 + > drivers/net/ethernet/intel/ixgbe/ixgbe_common.c | 2 +- > 2 files changed, 2 insertions(+), 1 deletion(-) > > diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig > index cf4034c..68ac5c7 100644 > --- a/arch/sparc/Kconfig > +++ b/arch/sparc/Kconfig > @@ -44,6 +44,7 @@ config SPARC > select CPU_NO_EFFICIENT_FFS > select HAVE_ARCH_HARDENED_USERCOPY > select PROVE_LOCKING_SMALL if PROVE_LOCKING > + select ARCH_WANT_RELAX_ORDER > > config SPARC32 > def_bool !64BIT
I'm pretty sure this is incomplete. I think you need to add a couple lines to arch/Kconfig so that the config option itself is listed somewhere. You might look at using something like HAVE_CMPXCHG_DOUBLE as an example. - Alex
