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x86/fpu: Make setup_init_fpu_buf() run-once explicitly
Remove the dependency on the init_xstate_buf == NULL check to implement once-per-bootup logic in eager_fpu_init(), by making setup_init_fpu_buf() run once per bootup explicitly. This is in preparation to make init_xstate_buf statically allocated. The various boot-once quirks in the FPU init code will be removed in a later cleanup stage. 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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@ -565,8 +565,14 @@ void setup_xstate_comp(void)
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/*
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* setup the xstate image representing the init state
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*/
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static void __init setup_init_fpu_buf(void)
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static void setup_init_fpu_buf(void)
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{
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static int 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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/*
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* Setup init_xstate_buf to represent the init state of
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* all the features managed by the xsave
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@ -738,8 +744,7 @@ void __init_refok eager_fpu_init(void)
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return;
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}
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if (!init_xstate_buf)
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setup_init_fpu_buf();
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setup_init_fpu_buf();
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}
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/*
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