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powerpc: Uncomment and make enable_kernel_vsx() routine available

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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 <leosilva@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Leonidas Da Silva Barbosa 2015-07-13 13:51:01 -03:00 committed by Herbert Xu
parent 1f644a7c7c
commit 72cd7b44bc
2 changed files with 1 additions and 3 deletions
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1
arch/powerpc/include/asm/switch_to.h
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@ -29,6 +29,7 @@ static inline void save_early_sprs(struct thread_struct *prev) {}
extern void enable_kernel_fp(void); extern void enable_kernel_fp(void);
extern void enable_kernel_altivec(void); extern void enable_kernel_altivec(void);
extern void enable_kernel_vsx(void);
extern int emulate_altivec(struct pt_regs *); extern int emulate_altivec(struct pt_regs *);
extern void __giveup_vsx(struct task_struct *); extern void __giveup_vsx(struct task_struct *);
extern void giveup_vsx(struct task_struct *); extern void giveup_vsx(struct task_struct *);

3
arch/powerpc/kernel/process.c
View File

@ -204,8 +204,6 @@ EXPORT_SYMBOL_GPL(flush_altivec_to_thread);
#endif /* CONFIG_ALTIVEC */ #endif /* CONFIG_ALTIVEC */
#ifdef CONFIG_VSX #ifdef CONFIG_VSX
#if 0
/* not currently used, but some crazy RAID module might want to later */
void enable_kernel_vsx(void) void enable_kernel_vsx(void)
{ {
WARN_ON(preemptible()); WARN_ON(preemptible());
@ -220,7 +218,6 @@ void enable_kernel_vsx(void)
#endif /* CONFIG_SMP */ #endif /* CONFIG_SMP */
} }
EXPORT_SYMBOL(enable_kernel_vsx); EXPORT_SYMBOL(enable_kernel_vsx);
#endif
void giveup_vsx(struct task_struct *tsk) void giveup_vsx(struct task_struct *tsk)
{ {