L4Linux: Return false for eager FPU handling

If this feature is set, it triggers a BUG_ON in 'do_device_not_available' (traps.c). Review on L4Linux update!
skalk · Feb 25, 2015 · 25aa4a5 · 25aa4a5
1 parent 7f2ab08
commit 25aa4a5
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/arch/x86/include/asm/fpu-internal.h b/arch/x86/include/asm/fpu-internal.h
@@ -89,7 +89,12 @@ static inline int is_x32_frame(void)
 
 static __always_inline __pure bool use_eager_fpu(void)
 {
-	return static_cpu_has(X86_FEATURE_EAGER_FPU);
+	/*
+	 * Always return false, otherwise the BUG_ON function in
+	 * 'do_device_not_available' (traps.c) triggers
+	 * (review on L4Linux update)
+	 */
+	return false;
 }
 
 static __always_inline __pure bool use_xsaveopt(void)