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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>
This commit is contained in:
Huacai Chen 2023-07-28 10:30:42 +08:00
parent 4eece7e6de
commit 1e74ae3280
1 changed files with 4 additions and 11 deletions
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15
arch/loongarch/include/asm/fpu.h
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@ -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);