powerpc/process: Remove useless #ifdef CONFIG_PPC_FPU

Add a stub for __giveup_fpu() when CONFIG_PPC_FPU is
not selected, as done for CONFIG_SPE and CONFIG_ALTIVEC.

This allows to remove some #ifdef CONFIG_PPC_FPU.

Also change one to IS_ENABLED().

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/69c8b7954ceeccc6b849e52e1fa41b3a0f10f6c1.1597643221.git.christophe.leroy@csgroup.eu

diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 348d435..14d5189 100644 (file)
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -229,6 +229,8 @@ void enable_kernel_fp(void)
        }
 }
 EXPORT_SYMBOL(enable_kernel_fp);
+#else
+static inline void __giveup_fpu(struct task_struct *tsk) { }
 #endif /* CONFIG_PPC_FPU */
 
 #ifdef CONFIG_ALTIVEC
@@ -406,9 +408,8 @@ static unsigned long msr_all_available;
 
 static int __init init_msr_all_available(void)
 {
-#ifdef CONFIG_PPC_FPU
-       msr_all_available |= MSR_FP;
-#endif
+       if (IS_ENABLED(CONFIG_PPC_FPU))
+               msr_all_available |= MSR_FP;
        if (cpu_has_feature(CPU_FTR_ALTIVEC))
                msr_all_available |= MSR_VEC;
        if (cpu_has_feature(CPU_FTR_VSX))
@@ -438,10 +439,8 @@ void giveup_all(struct task_struct *tsk)
 
        WARN_ON((usermsr & MSR_VSX) && !((usermsr & MSR_FP) && (usermsr & MSR_VEC)));
 
-#ifdef CONFIG_PPC_FPU
        if (usermsr & MSR_FP)
                __giveup_fpu(tsk);
-#endif
        if (usermsr & MSR_VEC)
                __giveup_altivec(tsk);
        if (usermsr & MSR_SPE)