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powerpc/mm: drop unused page flags 

The following page flags in pte-common.h can be dropped:

_PAGE_ENDIAN is only used in mm/fsl_booke_mmu.c and is defined in
asm/nohash/32/pte-fsl-booke.h

_PAGE_4K_PFN is nowhere defined nor used

_PAGE_READ, _PAGE_WRITE and _PAGE_PTE are only defined and used
in book3s/64

The following page flags in book3s/64/pgtable.h can be dropped as
they are not used on this platform nor by common code.

_PAGE_NA, _PAGE_RO, _PAGE_USER and _PAGE_PSIZE

Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy 2018-10-09 13:52:00 +00:00 committed by Michael Ellerman
parent 97026b5a5a
commit 093d7ca229
2 changed files with 2 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
arch/powerpc/include/asm/book3s/64/pgtable.h
View File

@ -14,10 +14,6 @@
*/
#define _PAGE_BIT_SWAP_TYPE 0
#define _PAGE_NA 0
#define _PAGE_RO 0
#define _PAGE_USER 0
#define _PAGE_EXEC 0x00001 /* execute permission */
#define _PAGE_WRITE 0x00002 /* write access allowed */
#define _PAGE_READ 0x00004 /* read access allowed */
@ -122,10 +118,6 @@
#define _PAGE_KERNEL_RO (_PAGE_PRIVILEGED | _PAGE_READ)
#define _PAGE_KERNEL_RWX (_PAGE_PRIVILEGED | _PAGE_DIRTY | \
_PAGE_RW | _PAGE_EXEC)
/*
* No page size encoding in the linux PTE
*/
#define _PAGE_PSIZE 0
/*
* _PAGE_CHG_MASK masks of bits that are to be preserved across
* pgprot changes
@ -149,7 +141,7 @@
* pages. We always set _PAGE_COHERENT when SMP is enabled or
* the processor might need it for DMA coherency.
*/
#define _PAGE_BASE_NC (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_PSIZE)
#define _PAGE_BASE_NC (_PAGE_PRESENT | _PAGE_ACCESSED)
#define _PAGE_BASE (_PAGE_BASE_NC)
/* Permission masks used to generate the __P and __S table,

17
arch/powerpc/include/asm/pte-common.h
View File

@ -14,18 +14,12 @@
#ifndef _PAGE_EXEC
#define _PAGE_EXEC 0
#endif
#ifndef _PAGE_ENDIAN
#define _PAGE_ENDIAN 0
#endif
#ifndef _PAGE_COHERENT
#define _PAGE_COHERENT 0
#endif
#ifndef _PAGE_WRITETHRU
#define _PAGE_WRITETHRU 0
#endif
#ifndef _PAGE_4K_PFN
#define _PAGE_4K_PFN 0
#endif
#ifndef _PAGE_SAO
#define _PAGE_SAO 0
#endif
@ -39,9 +33,6 @@
#define _PAGE_RW 0
#endif
#ifndef _PAGE_PTE
#define _PAGE_PTE 0
#endif
/* At least one of _PAGE_PRIVILEGED or _PAGE_USER must be defined */
#ifndef _PAGE_PRIVILEGED
#define _PAGE_PRIVILEGED 0
@ -122,7 +113,7 @@ static inline bool pte_user(pte_t pte)
/* Mask of bits returned by pte_pgprot() */
#define PAGE_PROT_BITS (_PAGE_GUARDED | _PAGE_COHERENT | _PAGE_NO_CACHE | \
_PAGE_WRITETHRU | _PAGE_ENDIAN | _PAGE_4K_PFN | \
_PAGE_WRITETHRU | \
_PAGE_USER | _PAGE_ACCESSED | _PAGE_RO | _PAGE_NA | \
_PAGE_PRIVILEGED | \
_PAGE_RW | _PAGE_HWWRITE | _PAGE_DIRTY | _PAGE_EXEC)
@ -208,12 +199,6 @@ static inline bool pte_user(pte_t pte)
#define PAGE_AGP (PAGE_KERNEL_NC)
#define HAVE_PAGE_AGP
#ifndef _PAGE_READ
/* if not defined, we should not find _PAGE_WRITE too */
#define _PAGE_READ 0
#define _PAGE_WRITE _PAGE_RW
#endif
#ifndef H_PAGE_4K_PFN
#define H_PAGE_4K_PFN 0
#endif