On Mon, Mar 23, 2015 at 9:47 AM, Denys Vlasenko <[email protected]> wrote: > This vDSO code only gets used by 64-bit kernel, > not 32-bit. In 64-bit kernels, data segment is the same > for 32-bit and 64-bit userspace, and SYSRET insn does load %ss > with its selector. No need to repeat it by hand. Segment loads > are somewhat expensive: tens of cycles. > > Signed-off-by: Denys Vlasenko <[email protected]> > CC: Linus Torvalds <[email protected]> > CC: Steven Rostedt <[email protected]> > CC: Ingo Molnar <[email protected]> > CC: Borislav Petkov <[email protected]> > CC: "H. Peter Anvin" <[email protected]> > CC: Andy Lutomirski <[email protected]> > CC: Oleg Nesterov <[email protected]> > CC: Frederic Weisbecker <[email protected]> > CC: Alexei Starovoitov <[email protected]> > CC: Will Drewry <[email protected]> > CC: Kees Cook <[email protected]> > CC: [email protected] > CC: [email protected] > --- > > Patch was run-tested.
Applied, thanks. --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/
