[PATCH 1/1] x86/cpu: don't allocate fpu->state for swapper/0

Oleg Nesterov
2015-03-13T18:29:28Z

Now that kthreads do not use FPU until exec swpper/0 doesn't need
to allocate fpu->state.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
---
arch/x86/kernel/xsave.c | 2 --
1 files changed, 0 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/xsave.c b/arch/x86/kernel/xsave.c
index dff0ec2..1cf5667 100644
--- a/arch/x86/kernel/xsave.c
+++ b/arch/x86/kernel/xsave.c
@@ -679,8 +679,6 @@ void xsave_init(void)

static inline void __init eager_fpu_init_bp(void)
{
- current->thread.fpu.state =
- alloc_bootmem_align(xstate_size, __alignof__(struct xsave_struct));
if (!init_xstate_buf)
setup_init_fpu_buf();
}
--
1.5.5.1