linux-kernel - [PATCH 3/3] sh: switch to generic version of pte allocation

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Date:   Thu,  8 Aug 2019 10:52:08 +0300
From:   Mike Rapoport <rppt@...ux.ibm.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Nicholas Piggin <npiggin@...il.com>,
        Tony Luck <tony.luck@...el.com>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        linux-arch@...r.kernel.org, linux-ia64@...r.kernel.org,
        linux-sh@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Mike Rapoport <rppt@...ux.ibm.com>
Subject: [PATCH 3/3] sh: switch to generic version of pte allocation

The sh implementation pte_alloc_one(), pte_alloc_one_kernel(),
pte_free_kernel() and pte_free() is identical to the generic except of lack
of __GFP_ACCOUNT for the user PTEs allocation.

Switch sh to use generic version of these functions.

Signed-off-by: Mike Rapoport <rppt@...ux.ibm.com>
---
 arch/sh/include/asm/pgalloc.h | 34 +---------------------------------
 1 file changed, 1 insertion(+), 33 deletions(-)

diff --git a/arch/sh/include/asm/pgalloc.h b/arch/sh/include/asm/pgalloc.h
index 9e15054..8c6341a 100644
--- a/arch/sh/include/asm/pgalloc.h
+++ b/arch/sh/include/asm/pgalloc.h
@@ -3,6 +3,7 @@
 #define __ASM_SH_PGALLOC_H
 
 #include <asm/page.h>
+#include <asm-generic/pgalloc.h>
 
 extern pgd_t *pgd_alloc(struct mm_struct *);
 extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
@@ -26,39 +27,6 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
 }
 #define pmd_pgtable(pmd) pmd_page(pmd)
 
-/*
- * Allocate and free page tables.
- */
-static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
-{
-	return (pte_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
-}
-
-static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
-{
-	struct page *page;
-
-	page = alloc_page(GFP_KERNEL | __GFP_ZERO);
-	if (!page)
-		return NULL;
-	if (!pgtable_page_ctor(page)) {
-		__free_page(page);
-		return NULL;
-	}
-	return page;
-}
-
-static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
-{
-	free_page((unsigned long)pte);
-}
-
-static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
-{
-	pgtable_page_dtor(pte);
-	__free_page(pte);
-}
-
 #define __pte_free_tlb(tlb,pte,addr)			\
 do {							\
 	pgtable_page_dtor(pte);				\
-- 
2.7.4