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Diffstat (limited to 'arch/arm64/include/asm/pgalloc.h')
-rw-r--r--arch/arm64/include/asm/pgalloc.h12
1 files changed, 11 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/pgalloc.h b/arch/arm64/include/asm/pgalloc.h
index cae8c648f462..aeba2cf15a25 100644
--- a/arch/arm64/include/asm/pgalloc.h
+++ b/arch/arm64/include/asm/pgalloc.h
@@ -14,6 +14,7 @@
#include <asm/tlbflush.h>
#define __HAVE_ARCH_PGD_FREE
+#define __HAVE_ARCH_PUD_FREE
#include <asm-generic/pgalloc.h>
#define PGD_SIZE (PTRS_PER_PGD * sizeof(pgd_t))
@@ -43,7 +44,8 @@ static inline void __pud_populate(pud_t *pudp, phys_addr_t pmdp, pudval_t prot)
static inline void __p4d_populate(p4d_t *p4dp, phys_addr_t pudp, p4dval_t prot)
{
- set_p4d(p4dp, __p4d(__phys_to_p4d_val(pudp) | prot));
+ if (pgtable_l4_enabled())
+ set_p4d(p4dp, __p4d(__phys_to_p4d_val(pudp) | prot));
}
static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4dp, pud_t *pudp)
@@ -53,6 +55,14 @@ static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4dp, pud_t *pudp)
p4dval |= (mm == &init_mm) ? P4D_TABLE_UXN : P4D_TABLE_PXN;
__p4d_populate(p4dp, __pa(pudp), p4dval);
}
+
+static inline void pud_free(struct mm_struct *mm, pud_t *pud)
+{
+ if (!pgtable_l4_enabled())
+ return;
+ BUG_ON((unsigned long)pud & (PAGE_SIZE-1));
+ free_page((unsigned long)pud);
+}
#else
static inline void __p4d_populate(p4d_t *p4dp, phys_addr_t pudp, p4dval_t prot)
{