Messages in this thread Patch in this message | | | Date | Mon, 23 Mar 2015 05:22:35 -0700 | From | tip-bot for Oleg Nesterov <> | Subject | [tip:x86/fpu] x86/fpu: Don't allocate fpu->state for swapper/0 |
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Commit-ID: 4bd5bf8c85e6bca5be9e7c4b3d7ad1942ae323f3 Gitweb: http://git.kernel.org/tip/4bd5bf8c85e6bca5be9e7c4b3d7ad1942ae323f3 Author: Oleg Nesterov <oleg@redhat.com> AuthorDate: Fri, 13 Mar 2015 19:27:16 +0100 Committer: Ingo Molnar <mingo@kernel.org> CommitDate: Mon, 23 Mar 2015 10:13:59 +0100
x86/fpu: Don't allocate fpu->state for swapper/0
Now that kthreads do not use FPU until they get executed, swapper/0 doesn't need to allocate fpu->state.
Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Pekka Riikonen <priikone@iki.fi> Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com> Cc: Rik van Riel <riel@redhat.com> Cc: Suresh Siddha <sbsiddha@gmail.com> Link: http://lkml.kernel.org/r/20150313182716.GB8249@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org> --- arch/x86/kernel/xsave.c | 2 -- 1 file changed, 2 deletions(-)
diff --git a/arch/x86/kernel/xsave.c b/arch/x86/kernel/xsave.c index 65c29b0..ada8df7b 100644 --- a/arch/x86/kernel/xsave.c +++ b/arch/x86/kernel/xsave.c @@ -680,8 +680,6 @@ 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(); }
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