On nohash, this function voids except for E500 with hugepages.
Take the book3s version and include that exception in the logic
and rename E500 update_mmu_cache_range() as __update_mmu_cache()
which gets called by update_mmu_cache_range().
Signed-off-by: Christophe Leroy <christophe.le...@csgroup.eu>
---
arch/powerpc/include/asm/book3s/pgtable.h | 24 -----------------------
arch/powerpc/include/asm/nohash/pgtable.h | 15 --------------
arch/powerpc/include/asm/pgtable.h | 22 +++++++++++++++++++++
arch/powerpc/mm/nohash/e500_hugetlbpage.c | 3 +--
4 files changed, 23 insertions(+), 41 deletions(-)
diff --git a/arch/powerpc/include/asm/book3s/pgtable.h
b/arch/powerpc/include/asm/book3s/pgtable.h
index 6f4578daea6c..f42d68c6b314 100644
--- a/arch/powerpc/include/asm/book3s/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/pgtable.h
@@ -8,28 +8,4 @@
#include <asm/book3s/32/pgtable.h>
#endif
-#ifndef __ASSEMBLY__
-void __update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
pte_t *ptep);
-
-/*
- * This gets called at the end of handling a page fault, when
- * the kernel has put a new PTE into the page table for the process.
- * We use it to ensure coherency between the i-cache and d-cache
- * for the page which has just been mapped in.
- * On machines which use an MMU hash table, we use this to put a
- * corresponding HPTE into the hash table ahead of time, instead of
- * waiting for the inevitable extra hash-table miss exception.
- */
-static inline void update_mmu_cache_range(struct vm_fault *vmf,
- struct vm_area_struct *vma, unsigned long address,
- pte_t *ptep, unsigned int nr)
-{
- if (IS_ENABLED(CONFIG_PPC32) && !mmu_has_feature(MMU_FTR_HPTE_TABLE))
- return;
- if (radix_enabled())
- return;
- __update_mmu_cache(vma, address, ptep);
-}
-
-#endif /* __ASSEMBLY__ */
#endif
diff --git a/arch/powerpc/include/asm/nohash/pgtable.h
b/arch/powerpc/include/asm/nohash/pgtable.h
index 5b6647fb398b..a9056f4fad48 100644
--- a/arch/powerpc/include/asm/nohash/pgtable.h
+++ b/arch/powerpc/include/asm/nohash/pgtable.h
@@ -259,20 +259,5 @@ static inline int pud_huge(pud_t pud)
#define is_hugepd(hpd) (hugepd_ok(hpd))
#endif
-/*
- * This gets called at the end of handling a page fault, when
- * the kernel has put a new PTE into the page table for the process.
- * We use it to ensure coherency between the i-cache and d-cache
- * for the page which has just been mapped in.
- */
-#if defined(CONFIG_PPC_E500) && defined(CONFIG_HUGETLB_PAGE)
-void update_mmu_cache_range(struct vm_fault *vmf, struct vm_area_struct *vma,
- unsigned long address, pte_t *ptep, unsigned int nr);
-#else
-static inline void update_mmu_cache_range(struct vm_fault *vmf,
- struct vm_area_struct *vma, unsigned long address,
- pte_t *ptep, unsigned int nr) {}
-#endif
-
#endif /* __ASSEMBLY__ */
#endif
diff --git a/arch/powerpc/include/asm/pgtable.h
b/arch/powerpc/include/asm/pgtable.h
index bcdbdeda65d3..2b4489bb7d99 100644
--- a/arch/powerpc/include/asm/pgtable.h
+++ b/arch/powerpc/include/asm/pgtable.h
@@ -119,6 +119,28 @@ pgprot_t phys_mem_access_prot(struct file *file, unsigned
long pfn,
unsigned long size, pgprot_t vma_prot);
#define __HAVE_PHYS_MEM_ACCESS_PROT
+void __update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
pte_t *ptep);
+
+/*
+ * This gets called at the end of handling a page fault, when
+ * the kernel has put a new PTE into the page table for the process.
+ * We use it to ensure coherency between the i-cache and d-cache
+ * for the page which has just been mapped in.
+ * On machines which use an MMU hash table, we use this to put a
+ * corresponding HPTE into the hash table ahead of time, instead of
+ * waiting for the inevitable extra hash-table miss exception.
+ */
+static inline void update_mmu_cache_range(struct vm_fault *vmf,
+ struct vm_area_struct *vma, unsigned long address,
+ pte_t *ptep, unsigned int nr)
+{
+ if (IS_ENABLED(CONFIG_PPC32) && !mmu_has_feature(MMU_FTR_HPTE_TABLE) &&
+ !(IS_ENABLED(CONFIG_PPC_E500) && IS_ENABLED(CONFIG_HUGETLB_PAGE)))
+ return;
+ if (radix_enabled())
+ return;
+ __update_mmu_cache(vma, address, ptep);
+}
/*
* When used, PTE_FRAG_NR is defined in subarch pgtable.h
diff --git a/arch/powerpc/mm/nohash/e500_hugetlbpage.c
b/arch/powerpc/mm/nohash/e500_hugetlbpage.c
index 6b30e40d4590..a134d28a0e4d 100644
--- a/arch/powerpc/mm/nohash/e500_hugetlbpage.c
+++ b/arch/powerpc/mm/nohash/e500_hugetlbpage.c
@@ -178,8 +178,7 @@ book3e_hugetlb_preload(struct vm_area_struct *vma, unsigned
long ea, pte_t pte)
*
* This must always be called with the pte lock held.
*/
-void update_mmu_cache_range(struct vm_fault *vmf, struct vm_area_struct *vma,
- unsigned long address, pte_t *ptep, unsigned int nr)
+void __update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
pte_t *ptep)
{
if (is_vm_hugetlb_page(vma))
book3e_hugetlb_preload(vma, address, *ptep);
--
2.41.0
