x86/fpu: Propagate once per boot quirk into fpu__init_system_xstate()
Linearize the call sequence in xsave_init(): fpu__init_system_xstate(); fpu__init_cpu_xstate(); We do this by propagating the boot-once quirk into fpu__init_system_xstate(). fpu__init_cpu_xstate() is safe to be called multiple time. 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>
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@ -652,6 +652,11 @@ static void __init init_xstate_size(void)
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void fpu__init_system_xstate(void)
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{
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unsigned int eax, ebx, ecx, edx;
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static bool on_boot_cpu = 1;
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if (!on_boot_cpu)
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return;
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on_boot_cpu = 0;
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if (!cpu_has_xsave) {
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pr_info("x86/fpu: Legacy x87 FPU detected.\n");
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@ -714,14 +719,8 @@ void fpu__init_system_xstate(void)
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*/
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void xsave_init(void)
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{
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static char on_boot_cpu = 1;
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if (on_boot_cpu) {
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on_boot_cpu = 0;
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fpu__init_system_xstate();
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} else {
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fpu__init_cpu_xstate();
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}
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}
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/*
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