linux-kernel - [PATCH v2 02/14] alpha: switch to generic version of pte allocation

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Message-Id: <1557296232-15361-3-git-send-email-rppt@linux.ibm.com>
Date:   Wed,  8 May 2019 09:16:59 +0300
From:   Mike Rapoport <rppt@...ux.ibm.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Anshuman Khandual <anshuman.khandual@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Greentime Hu <green.hu@...il.com>,
        Guan Xuetao <gxt@....edu.cn>, Guo Ren <guoren@...nel.org>,
        Helge Deller <deller@....de>, Ley Foon Tan <lftan@...era.com>,
        Matthew Wilcox <willy@...radead.org>,
        Matt Turner <mattst88@...il.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Michal Hocko <mhocko@...e.com>,
        Palmer Dabbelt <palmer@...ive.com>,
        Paul Burton <paul.burton@...s.com>,
        Richard Kuo <rkuo@...eaurora.org>,
        Richard Weinberger <richard@....at>,
        Russell King <linux@...linux.org.uk>,
        Sam Creasey <sammy@...my.net>, x86@...nel.org,
        linux-alpha@...r.kernel.org, linux-arch@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-hexagon@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-m68k@...ts.linux-m68k.org, linux-mips@...r.kernel.org,
        linux-mm@...ck.org, linux-parisc@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-riscv@...ts.infradead.org,
        linux-um@...ts.infradead.org, nios2-dev@...ts.rocketboards.org,
        Mike Rapoport <rppt@...ux.ibm.com>
Subject: [PATCH v2 02/14] alpha: switch to generic version of pte allocation

alpha allocates PTE pages with __get_free_page() and uses
GFP_KERNEL | __GFP_ZERO for the allocations.

Switch it to the generic version that does exactly the same thing for the
kernel page tables and adds __GFP_ACCOUNT for the user PTEs.

The alpha pte_free() and pte_free_kernel() versions are identical to the
generic ones and can be simply dropped.

Signed-off-by: Mike Rapoport <rppt@...ux.ibm.com>
---
 arch/alpha/include/asm/pgalloc.h | 40 +++-------------------------------------
 1 file changed, 3 insertions(+), 37 deletions(-)

diff --git a/arch/alpha/include/asm/pgalloc.h b/arch/alpha/include/asm/pgalloc.h
index 02f9f91..71ded3b 100644
--- a/arch/alpha/include/asm/pgalloc.h
+++ b/arch/alpha/include/asm/pgalloc.h
@@ -5,6 +5,8 @@
 #include <linux/mm.h>
 #include <linux/mmzone.h>
 
+#include <asm-generic/pgalloc.h>	/* for pte_{alloc,free}_one */
+
 /*      
  * Allocate and free page tables. The xxx_kernel() versions are
  * used to allocate a kernel page table - this turns on ASN bits
@@ -41,7 +43,7 @@ pgd_free(struct mm_struct *mm, pgd_t *pgd)
 static inline pmd_t *
 pmd_alloc_one(struct mm_struct *mm, unsigned long address)
 {
-	pmd_t *ret = (pmd_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
+	pmd_t *ret = (pmd_t *)__get_free_page(GFP_PGTABLE_USER);
 	return ret;
 }
 
@@ -51,42 +53,6 @@ pmd_free(struct mm_struct *mm, pmd_t *pmd)
 	free_page((unsigned long)pmd);
 }
 
-static inline pte_t *
-pte_alloc_one_kernel(struct mm_struct *mm)
-{
-	pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
-	return pte;
-}
-
-static inline void
-pte_free_kernel(struct mm_struct *mm, pte_t *pte)
-{
-	free_page((unsigned long)pte);
-}
-
-static inline pgtable_t
-pte_alloc_one(struct mm_struct *mm)
-{
-	pte_t *pte = pte_alloc_one_kernel(mm);
-	struct page *page;
-
-	if (!pte)
-		return NULL;
-	page = virt_to_page(pte);
-	if (!pgtable_page_ctor(page)) {
-		__free_page(page);
-		return NULL;
-	}
-	return page;
-}
-
-static inline void
-pte_free(struct mm_struct *mm, pgtable_t page)
-{
-	pgtable_page_dtor(page);
-	__free_page(page);
-}
-
 #define check_pgt_cache()	do { } while (0)
 
 #endif /* _ALPHA_PGALLOC_H */
-- 
2.7.4