On Tue, Oct 23, 2018 at 11:43 AM Chang S. Bae <[email protected]> wrote: > > From: Andi Kleen <[email protected]> > > Add C intrinsics and assembler macros for the new FSBASE and GSBASE > instructions. > > Very straight forward. Used in followon patches. > > [ luto: Rename the variables from FS and GS to FSBASE and GSBASE and > make <asm/fsgsbase.h> safe to include on 32-bit kernels. ] > > v2: Use __always_inline > > [ chang: Revise the changelog. Place them in <asm/fsgsbase.h>. Replace > the macros with GAS-compatible ones. ] > > If GCC supports it, we can add -mfsgsbase to CFLAGS and use the builtins > here for extra performance.
Reviewed-by: Andy Lutomirski <[email protected]> # C parts only With the caveat that I'm not convinced that the memory clobbers are needed. The __force_order trick in special_insns.h would probably be more appropriate. I don't feel qualified to review the asm part without some research. Whereas hpa or Boris could probably review it with their eyes closed.
