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powerpc: Add function to copy mm_context_t to the paca

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This adds a function to copy the mm->context to the paca.  This is
only a basic conversion for now but will be used more extensively in
the next patch.

This also adds #ifdef CONFIG_PPC_BOOK3S around this code since it's
not used elsewhere.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Michael Neuling
2015-10-28 15:54:06 +11:00
committed by Michael Ellerman
parent 1b855e167b
commit c395465da6
5 changed files with 18 additions and 5 deletions
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11
arch/powerpc/include/asm/paca.h
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@@ -131,7 +131,9 @@ struct paca_struct {
struct tlb_core_data tcd;
#endif /* CONFIG_PPC_BOOK3E */
#ifdef CONFIG_PPC_BOOK3S
mm_context_t context;
#endif
/*
* then miscellaneous read-write fields
@@ -194,6 +196,15 @@ struct paca_struct {
#endif
};
#ifdef CONFIG_PPC_BOOK3S
static inline void copy_mm_to_paca(mm_context_t *context)
{
get_paca()->context = *context;
}
#else
static inline void copy_mm_to_paca(mm_context_t *context){}
#endif
extern struct paca_struct *paca;
extern void initialise_paca(struct paca_struct *new_paca, int cpu);
extern void setup_paca(struct paca_struct *new_paca);