powerpc: Uncomment and make enable_kernel_vsx() routine available

Leonidas Da Silva Barbosa · herbertx · commit 72cd7b44bc99 · 2015-07-14T14:56:48.000+08:00
enable_kernel_vsx() function was commented since anything was using
it. However, vmx-crypto driver uses VSX instructions which are
only available if VSX is enable. Otherwise it rises an exception oops.

This patch uncomment enable_kernel_vsx() routine and makes it available.

Signed-off-by: Leonidas S. Barbosa &lt;leosilva@linux.vnet.ibm.com&gt;
Signed-off-by: Herbert Xu &lt;herbert@gondor.apana.org.au&gt;
diff --git a/arch/powerpc/include/asm/switch_to.h b/arch/powerpc/include/asm/switch_to.h
@@ -29,6 +29,7 @@ static inline void save_early_sprs(struct thread_struct *prev) {}
 
 extern void enable_kernel_fp(void);
 extern void enable_kernel_altivec(void);
+extern void enable_kernel_vsx(void);
 extern int emulate_altivec(struct pt_regs *);
 extern void __giveup_vsx(struct task_struct *);
 extern void giveup_vsx(struct task_struct *);
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
@@ -204,8 +204,6 @@ EXPORT_SYMBOL_GPL(flush_altivec_to_thread);
 #endif /* CONFIG_ALTIVEC */
 
 #ifdef CONFIG_VSX
-#if 0
-/* not currently used, but some crazy RAID module might want to later */
 void enable_kernel_vsx(void)
 {
 	WARN_ON(preemptible());
@@ -220,7 +218,6 @@ void enable_kernel_vsx(void)
 #endif /* CONFIG_SMP */
 }
 EXPORT_SYMBOL(enable_kernel_vsx);
-#endif
 
 void giveup_vsx(struct task_struct *tsk)
 {

Original file line number	Diff line number	Diff line change
`@@ -204,8 +204,6 @@ EXPORT_SYMBOL_GPL(flush_altivec_to_thread);`
`204`	`204`	`#endif /* CONFIG_ALTIVEC */`
`205`	`205`
`206`	`206`	`#ifdef CONFIG_VSX`
`207`		`-#if 0`
`208`		`-/* not currently used, but some crazy RAID module might want to later */`
`209`	`207`	`void enable_kernel_vsx(void)`
`210`	`208`	`{`
`211`	`209`	`WARN_ON(preemptible());`
`@@ -220,7 +218,6 @@ void enable_kernel_vsx(void)`
`220`	`218`	`#endif /* CONFIG_SMP */`
`221`	`219`	`}`
`222`	`220`	`EXPORT_SYMBOL(enable_kernel_vsx);`
`223`		`-#endif`
`224`	`221`
`225`	`222`	`void giveup_vsx(struct task_struct *tsk)`
`226`	`223`	`{`