x86/fpu: Call fpu__init_cpu_ctx_switch() from fpu__init_cpu()

fpu__init_cpu() is currently called from fpu__init_system(),
which is the wrong place for it: call it from the proper high level
per CPU init function, fpu__init_cpu().

Note, we still keep the old call site as well, because it depends
on having proper CR0::TS setup. We'll fix this in the next patch.

Reviewed-by: Borislav Petkov <bp@alien8.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/arch/x86/kernel/fpu/init.c b/arch/x86/kernel/fpu/init.c
index ca3468d8bc315ba3726628646df086bc2ac54d30..b3ea4f86d64301e3598530d4b195a5d9c49ecf2c 100644 (file)
--- a/arch/x86/kernel/fpu/init.c
+++ b/arch/x86/kernel/fpu/init.c
@@ -165,6 +165,7 @@ void fpu__init_cpu(void)
        write_cr0(cr0);
 
        fpu__init_cpu_xstate();
+       fpu__init_cpu_ctx_switch();
 }
 
 static enum { AUTO, ENABLE, DISABLE } eagerfpu = AUTO;