linux-kernel - [PATCH v3 08/24] powerpc/mm: don't use _PAGE

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Date:   Tue,  9 Oct 2018 13:51:47 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Dominik Brodowski <linux@...inikbrodowski.net>,
        Geoff Levand <geoff@...radead.org>,
        Jens Axboe <axboe@...nel.dk>,
        Kumar Gala <galak@...nel.crashing.org>,
        Li Yang <leoyang.li@....com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Nicholas Piggin <npiggin@...il.com>,
        Paul Mackerras <paulus@...ba.org>,
        Scott Wood <oss@...error.net>, aneesh.kumar@...ux.vnet.ibm.com
Cc:     linux-arm-kernel@...ts.infradead.org, linux-block@...r.kernel.org,
        linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, dri-devel@...ts.freedesktop.org
Subject: [PATCH v3 08/24] powerpc/mm: don't use _PAGE_EXEC in book3s/32

book3s/32 doesn't define _PAGE_EXEC, so no need to use it.

All other platforms define _PAGE_EXEC so no need to check
it is not NUL when not book3s/32.

Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@...ux.ibm.com>
Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
---
 arch/powerpc/include/asm/book3s/32/pgtable.h | 2 +-
 arch/powerpc/mm/pgtable.c                    | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/powerpc/include/asm/book3s/32/pgtable.h b/arch/powerpc/include/asm/book3s/32/pgtable.h
index 7a9f0ed599ff..3127cc529aa1 100644
--- a/arch/powerpc/include/asm/book3s/32/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/32/pgtable.h
@@ -234,7 +234,7 @@ static inline void __ptep_set_access_flags(struct vm_area_struct *vma,
 					   int psize)
 {
 	unsigned long set = pte_val(entry) &
-		(_PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_RW | _PAGE_EXEC);
+		(_PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_RW);
 	unsigned long clr = ~pte_val(entry) & _PAGE_RO;
 
 	pte_update(ptep, clr, set);
diff --git a/arch/powerpc/mm/pgtable.c b/arch/powerpc/mm/pgtable.c
index aee04b209b51..f97d9c3760e3 100644
--- a/arch/powerpc/mm/pgtable.c
+++ b/arch/powerpc/mm/pgtable.c
@@ -73,7 +73,7 @@ static struct page *maybe_pte_to_page(pte_t pte)
 	return page;
 }
 
-#if defined(CONFIG_PPC_STD_MMU) || _PAGE_EXEC == 0
+#ifdef CONFIG_PPC_BOOK3S
 
 /* Server-style MMU handles coherency when hashing if HW exec permission
  * is supposed per page (currently 64-bit only). If not, then, we always
@@ -106,7 +106,7 @@ static pte_t set_access_flags_filter(pte_t pte, struct vm_area_struct *vma,
 	return pte;
 }
 
-#else /* defined(CONFIG_PPC_STD_MMU) || _PAGE_EXEC == 0 */
+#else /* CONFIG_PPC_BOOK3S */
 
 /* Embedded type MMU with HW exec support. This is a bit more complicated
  * as we don't have two bits to spare for _PAGE_EXEC and _PAGE_HWEXEC so
@@ -179,7 +179,7 @@ static pte_t set_access_flags_filter(pte_t pte, struct vm_area_struct *vma,
 	return __pte(pte_val(pte) | _PAGE_EXEC);
 }
 
-#endif /* !(defined(CONFIG_PPC_STD_MMU) || _PAGE_EXEC == 0) */
+#endif /* CONFIG_PPC_BOOK3S */
 
 /*
  * set_pte stores a linux PTE into the linux page table.
-- 
2.13.3