LoongArch: Cleanup __builtin_constant_p() checking for cpu_has_*

In the current configuration, cpu_has_lsx and cpu_has_lasx cannot be
constants. So cleanup the __builtin_constant_p() checking to reduce the
complexity.

Reviewed-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

diff --git a/arch/loongarch/include/asm/fpu.h b/arch/loongarch/include/asm/fpu.h
index e4193d637f664eecae6d47b8d2bbc15f2b2e3200..b541f6248837eaac0a88448546169ef0f2c59b6e 100644 (file)
--- a/arch/loongarch/include/asm/fpu.h
+++ b/arch/loongarch/include/asm/fpu.h
@@ -218,15 +218,8 @@ static inline void restore_lsx(struct task_struct *t)
 
 static inline void init_lsx_upper(void)
 {
-       /*
-        * Check cpu_has_lsx only if it's a constant. This will allow the
-        * compiler to optimise out code for CPUs without LSX without adding
-        * an extra redundant check for CPUs with LSX.
-        */
-       if (__builtin_constant_p(cpu_has_lsx) && !cpu_has_lsx)
-               return;
-
-       _init_lsx_upper();
+       if (cpu_has_lsx)
+               _init_lsx_upper();
 }
 
 static inline void restore_lsx_upper(struct task_struct *t)
@@ -294,7 +287,7 @@ static inline void restore_lasx_upper(struct task_struct *t) {}
 
 static inline int thread_lsx_context_live(void)
 {
-       if (__builtin_constant_p(cpu_has_lsx) && !cpu_has_lsx)
+       if (!cpu_has_lsx)
                return 0;
 
        return test_thread_flag(TIF_LSX_CTX_LIVE);
@@ -302,7 +295,7 @@ static inline int thread_lsx_context_live(void)
 
 static inline int thread_lasx_context_live(void)
 {
-       if (__builtin_constant_p(cpu_has_lasx) && !cpu_has_lasx)
+       if (!cpu_has_lasx)
                return 0;
 
        return test_thread_flag(TIF_LASX_CTX_LIVE);