Messages in this thread | | | Date | Sun, 15 Apr 2012 01:59:33 +0200 | From | Oleg Nesterov <> | Subject | Re: ptrace && fpu_lazy_restore |
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forgot to mention just in case...
On 04/15, Oleg Nesterov wrote: > > --- x/arch/x86/kernel/i387.c~ 2012-04-09 20:12:12.000000000 +0200 > +++ x/arch/x86/kernel/i387.c 2012-04-15 01:34:09.000000000 +0200 > @@ -301,6 +301,8 @@ int xfpregs_set(struct task_struct *targ > > sanitize_i387_state(target); > > + target->thread.fpu.last_cpu = ~0; > + > ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, > &target->thread.fpu.state->fxsave, 0, -1); > > @@ -563,6 +565,8 @@ int fpregs_set(struct task_struct *targe > > sanitize_i387_state(target); > > + target->thread.fpu.last_cpu = ~0; > + > if (!HAVE_HWFP) > return fpregs_soft_set(target, regset, pos, count, kbuf, ubuf); >
with this hack the test-case works fine.
Oleg.
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