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powerpc/mm: add helpers to get/set mm.context->pte_frag

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In order to handle pte_fragment functions with single fragment
without adding pte_frag in all mm_context_t, this patch creates
two helpers which do nothing on platforms using a single fragment.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy
2018-11-29 14:06:59 +00:00
committed by Michael Ellerman
parent d09780f3a8
commit a74791dd98
2 changed files with 29 additions and 4 deletions
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25
arch/powerpc/include/asm/pgtable.h
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@@ -110,6 +110,31 @@ void mark_initmem_nx(void);
static inline void mark_initmem_nx(void) { }
#endif
/*
* When used, PTE_FRAG_NR is defined in subarch pgtable.h
* so we are sure it is included when arriving here.
*/
#ifdef PTE_FRAG_NR
static inline void *pte_frag_get(mm_context_t *ctx)
{
return ctx->pte_frag;
}
static inline void pte_frag_set(mm_context_t *ctx, void *p)
{
ctx->pte_frag = p;
}
#else
static inline void *pte_frag_get(mm_context_t *ctx)
{
return NULL;
}
static inline void pte_frag_set(mm_context_t *ctx, void *p)
{
}
#endif
#endif /* __ASSEMBLY__ */
#endif /* _ASM_POWERPC_PGTABLE_H */