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powerpc/nohash: Deduplicate _PAGE_CHG_MASK

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_PAGE_CHG_MASK is identical between nohash/32 and nohash/64,
deduplicate it.

While at it, clean the #ifdef for PTE_RPN_MASK in nohash/32 as
it is already CONFIG_PPC32.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/c1a1893dbba4afb825bfa78b262f0b0e0fc3b490.1695659959.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy
2023-09-25 20:31:28 +02:00
committed by Michael Ellerman
parent 7c929ad0b3
commit 27672be775
3 changed files with 7 additions and 13 deletions
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6
arch/powerpc/include/asm/nohash/pgtable.h
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@@ -13,6 +13,12 @@ static inline pte_basic_t pte_update(struct mm_struct *mm, unsigned long addr, p
#include <asm/nohash/32/pgtable.h>
#endif
/*
* _PAGE_CHG_MASK masks of bits that are to be preserved across
* pgprot changes.
*/
#define _PAGE_CHG_MASK (PTE_RPN_MASK | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_SPECIAL)
/* Permission masks used for kernel mappings */
#define PAGE_KERNEL __pgprot(_PAGE_BASE | _PAGE_KERNEL_RW)
#define PAGE_KERNEL_NC __pgprot(_PAGE_BASE_NC | _PAGE_KERNEL_RW | _PAGE_NO_CACHE)