Commit 1e74ae32 authored by Huacai Chen's avatar Huacai Chen
Browse files

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: default avatarWANG Xuerui <git@xen0n.name>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent 4eece7e6

arch/loongarch/include/asm/fpu.h

+4 −11
Original line number Diff line number Diff line
@@ -218,14 +218,7 @@ 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;



	if (cpu_has_lsx)

		_init_lsx_upper();

}
@@ -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);