Change flush_thread() to do user_fpu_begin() + restore_init_xstate() and avoid math_state_restore().
Note: "TODO: cleanup this horror" is still valid. We do not need init_fpu() at all, we only need fpu_alloc() + memset(0). But this needs other changes, in particular user_fpu_begin() should set used_math(). Signed-off-by: Oleg Nesterov <[email protected]> --- arch/x86/kernel/process.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c index dd9a069..c396de2 100644 --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -142,7 +142,8 @@ void flush_thread(void) /* kthread execs. TODO: cleanup this horror. */ if (WARN_ON(init_fpu(current))) force_sig(SIGKILL, current); - math_state_restore(); + user_fpu_begin(); + restore_init_xstate(); } } -- 1.5.5.1 -- 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/
