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Oleg Nesterov authored
AFAICS, there is no reason why kernel threads should have FPU context even if use_eager_fpu() == T. Now that interrupted_kernel_fpu_idle() does not check __thread_has_fpu() in the use_eager_fpu() case, we can remove the init_fpu() code from eager_fpu_init() and change flush_thread() called by do_execve() to initialize FPU. Note: of course, the change in flush_thread() is horrible and must be cleanuped. We need the new helper, and flush_thread() should return the error if init_fpu() fails. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Reviewed-by: Rik van Riel <riel@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Suresh Siddha <sbsiddha@gmail.com> Cc: Andy Lutomirski <luto@amacapital.net> Link: http://lkml.kernel.org/r/20150119185212.GD16427@redhat.comSigned-off-by: Borislav Petkov <bp@suse.de>
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