On 2017/1/6 23:41, Alexander Duyck wrote: > 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 > >
thank you for comments, i will send v2 patch soon.
