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powerpc: fix giveup_vsx to save registers correctly

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giveup_vsx didn't save the FPU and VMX regsiters.  Change it to be
like giveup_fpr/altivec which save these registers.

Also update call sites where FPU and VMX are already saved to use the
original giveup_vsx (renamed to __giveup_vsx).

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Michael Neuling
2008-07-11 16:29:12 +10:00
committed by Benjamin Herrenschmidt
parent 01f4b8b8b8
commit 7c29217096
5 changed files with 16 additions and 7 deletions
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10
arch/powerpc/kernel/process.c
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@@ -159,6 +159,13 @@ void enable_kernel_vsx(void)
EXPORT_SYMBOL(enable_kernel_vsx);
#endif
void giveup_vsx(struct task_struct *tsk)
{
giveup_fpu(tsk);
giveup_altivec(tsk);
__giveup_vsx(tsk);
}
void flush_vsx_to_thread(struct task_struct *tsk)
{
if (tsk->thread.regs) {
@@ -290,7 +297,8 @@ struct task_struct *__switch_to(struct task_struct *prev,
#endif /* CONFIG_ALTIVEC */
#ifdef CONFIG_VSX
if (prev->thread.regs && (prev->thread.regs->msr & MSR_VSX))
giveup_vsx(prev);
/* VMX and FPU registers are already save here */
__giveup_vsx(prev);
#endif /* CONFIG_VSX */
#ifdef CONFIG_SPE
/*