On Mon, 18 May 2015, Dave Hansen wrote: > From: Dave Hansen <dave.han...@linux.intel.com> > > The MPX code appears to be saving off the FPU in an unsafe > way. It does not disable preemption or ensure that the > FPU state has been allocated. All of the preemption safety > comes from the unfortunatley-named 'unlazy_fpu()'. > > This patch introduces a new helper which will do both of > those things internally. > > Note that this requires a patch from Oleg in order to work > properly. It is currently in tip/x86/fpu. > > > commit f893959b0898bd876673adbeb6798bdf25c034d7 > > Author: Oleg Nesterov <o...@redhat.com> > > Date: Fri Mar 13 18:30:30 2015 +0100 > > > > x86/fpu: Don't abuse drop_init_fpu() in flush_thread() > > Signed-off-by: Dave Hansen <dave.han...@linux.intel.com> > Cc: Oleg Nesterov <o...@redhat.com> > Cc: b...@alien8.de > Cc: Rik van Riel <r...@redhat.com> > Cc: Suresh Siddha <sbsid...@gmail.com> > Cc: Andy Lutomirski <l...@amacapital.net> > Cc: Thomas Gleixner <t...@linutronix.de> > Cc: Ingo Molnar <mi...@redhat.com> > Cc: "H. Peter Anvin" <h...@zytor.com> > Cc: Fenghua Yu <fenghua...@intel.com> > Cc: the arch/x86 maintainers <x...@kernel.org>
Reviewed-by: Thomas Gleixner <t...@linutronix.de> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
