On Tue, Jun 9, 2015 at 11:54 AM, Denys Vlasenko <[email protected]> wrote: > This doesn't change much, but this uses shorter 32-bit insns: > > -48 8b 74 24 68 mov 0x68(%rsp),%rsi > -48 8b 7c 24 70 mov 0x70(%rsp),%rdi > -48 8b 54 24 60 mov 0x60(%rsp),%rdx > +8b 74 24 68 mov 0x68(%rsp),%esi > +8b 7c 24 70 mov 0x70(%rsp),%edi > +8b 54 24 60 mov 0x60(%rsp),%edx > > Since these are the only uses of RESTORE_RSI_RDI[_RDX], drop these macros. >
It probably doesn't matter for these fast paths, but, for the full slow path return, we really do need to restore the full pt_regs. After all, the syscall we're returning from might be sigreturn. --Andy -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
