linux-kernel - [PATCH v1 18/19] powerpc/nohash: Refactor pte

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Message-ID: <f3e1871f76fbaea0e17c1165b732bd1896582f07.1694443576.git.christophe.leroy@csgroup.eu>
Date:   Mon, 11 Sep 2023 21:03:24 +0200
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Michael Ellerman <mpe@...erman.id.au>,
        Nicholas Piggin <npiggin@...il.com>
Cc:     Christophe Leroy <christophe.leroy@...roup.eu>,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v1 18/19] powerpc/nohash: Refactor pte_clear()

pte_clear() are doing the same on nohash/32 and nohash/64,

Keep the static inline version of nohash/64, make it common and
remove the macro version of nohash/32.

Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
 arch/powerpc/include/asm/nohash/32/pgtable.h | 3 ---
 arch/powerpc/include/asm/nohash/64/pgtable.h | 7 -------
 arch/powerpc/include/asm/nohash/pgtable.h    | 6 ++++++
 3 files changed, 6 insertions(+), 10 deletions(-)

diff --git a/arch/powerpc/include/asm/nohash/32/pgtable.h b/arch/powerpc/include/asm/nohash/32/pgtable.h
index 0be464af4cb1..481594097f46 100644
--- a/arch/powerpc/include/asm/nohash/32/pgtable.h
+++ b/arch/powerpc/include/asm/nohash/32/pgtable.h
@@ -153,9 +153,6 @@
 
 #ifndef __ASSEMBLY__
 
-#define pte_clear(mm, addr, ptep) \
-	do { pte_update(mm, addr, ptep, ~0, 0, 0); } while (0)
-
 #define pmd_none(pmd)		(!pmd_val(pmd))
 #define	pmd_bad(pmd)		(pmd_val(pmd) & _PMD_BAD)
 #define	pmd_present(pmd)	(pmd_val(pmd) & _PMD_PRESENT_MASK)
diff --git a/arch/powerpc/include/asm/nohash/64/pgtable.h b/arch/powerpc/include/asm/nohash/64/pgtable.h
index dc6e35c3a53f..b59fbf754f82 100644
--- a/arch/powerpc/include/asm/nohash/64/pgtable.h
+++ b/arch/powerpc/include/asm/nohash/64/pgtable.h
@@ -159,13 +159,6 @@ static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
 	__young;							\
 })
 
-static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
-			     pte_t * ptep)
-{
-	pte_update(mm, addr, ptep, ~0UL, 0, 0);
-}
-
-
 /* Set the dirty and/or accessed bits atomically in a linux PTE */
 static inline void __ptep_set_access_flags(struct vm_area_struct *vma,
 					   pte_t *ptep, pte_t entry,
diff --git a/arch/powerpc/include/asm/nohash/pgtable.h b/arch/powerpc/include/asm/nohash/pgtable.h
index 7e810a84ac15..464eb771db82 100644
--- a/arch/powerpc/include/asm/nohash/pgtable.h
+++ b/arch/powerpc/include/asm/nohash/pgtable.h
@@ -96,6 +96,12 @@ static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
 }
 #define __HAVE_ARCH_PTEP_GET_AND_CLEAR
 
+static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
+			     pte_t * ptep)
+{
+	pte_update(mm, addr, ptep, ~0UL, 0, 0);
+}
+
 /* Generic accessors to PTE bits */
 #ifndef pte_mkwrite_novma
 static inline pte_t pte_mkwrite_novma(pte_t pte)
-- 
2.41.0