add xenomai

hc

2024-11-01 2f529f9b558ca1c1bd74be7437a84e4711743404

 kernel/arch/x86/include/asm/fpu/api.h
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@@ -41,16 +41,25 @@
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  * fpu->state and set TIF_NEED_FPU_LOAD leaving CPU's FPU registers in
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  * a random state.
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  */
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-static inline void fpregs_lock(void)
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+static inline unsigned long fpregs_lock(void)
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 {
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-	preempt_disable();
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-	local_bh_disable();
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+	if (IS_ENABLED(CONFIG_IRQ_PIPELINE)) {
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+		return hard_preempt_disable();
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+	} else {
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+		preempt_disable();
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+		local_bh_disable();
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+		return 0;
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+	}
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 }
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-static inline void fpregs_unlock(void)
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+static inline void fpregs_unlock(unsigned long flags)
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 {
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-	local_bh_enable();
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-	preempt_enable();
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+	if (IS_ENABLED(CONFIG_IRQ_PIPELINE)) {
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+		hard_preempt_enable(flags);
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+	} else {
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+		local_bh_enable();
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+		preempt_enable();
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+	}
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 }
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 #ifdef CONFIG_X86_DEBUG_FPU
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@@ -64,6 +73,10 @@
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  */
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 extern void switch_fpu_return(void);
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+/* For Dovetail context switching. */
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+void fpu__suspend_inband(void);
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+void fpu__resume_inband(void);
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+
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 /*
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  * Query the presence of one or more xfeatures. Works on any legacy CPU as well.
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  *