diff options
| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2018-01-12 13:45:29 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-01-16 23:47:14 +1100 |
| commit | 351750331fc1580cdb60d2efef04238f5faa89fe (patch) | |
| tree | fab5ee5e236ff91fd63640f27f142bee3b691cbb /arch/powerpc/include/asm/nohash | |
| parent | 812fadcb941a81d1f3948b10a95a4dce663da3e4 (diff) | |
powerpc/mm: Introduce _PAGE_NA
Today, PAGE_NONE is defined as a page not having _PAGE_USER.
In some circunstances, when the CPU supports it, it might be
better to be able to flag a page with NO ACCESS.
In a following patch, the 8xx will switch user access being flagged
in the PMD, therefore it will not be possible anymore to use
_PAGE_USER as a way to flag a page with no access.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/nohash')
| -rw-r--r-- | arch/powerpc/include/asm/nohash/32/pgtable.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/nohash/32/pgtable.h b/arch/powerpc/include/asm/nohash/32/pgtable.h index cc2bfec3aa3b..504a3c36ce5c 100644 --- a/arch/powerpc/include/asm/nohash/32/pgtable.h +++ b/arch/powerpc/include/asm/nohash/32/pgtable.h @@ -282,7 +282,7 @@ static inline void __ptep_set_access_flags(struct mm_struct *mm, { unsigned long set = pte_val(entry) & (_PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_RW | _PAGE_EXEC); - unsigned long clr = ~pte_val(entry) & _PAGE_RO; + unsigned long clr = ~pte_val(entry) & (_PAGE_RO | _PAGE_NA); pte_update(ptep, clr, set); } |