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(parent: 812fadc) | patch
powerpc/mm: Introduce _PAGE_NA
authorChristophe Leroy <christophe.leroy@c-s.fr>
Fri, 12 Jan 2018 12:45:29 +0000 (13:45 +0100)
committerMichael Ellerman <mpe@ellerman.id.au>
Tue, 16 Jan 2018 12:47:14 +0000 (23:47 +1100)
commit351750331fc1580cdb60d2efef04238f5faa89fe
treefab5ee5e236ff91fd63640f27f142bee3b691cbbtree | snapshot
parent812fadcb941a81d1f3948b10a95a4dce663da3e4commit | 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>
arch/powerpc/include/asm/book3s/64/pgtable.h diff | blob | history
arch/powerpc/include/asm/nohash/32/pgtable.h diff | blob | history
arch/powerpc/include/asm/pte-common.h diff | blob | history
arch/powerpc/mm/dump_linuxpagetables.c diff | blob | history
Domain: System / Kernel;