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(parent: 2ef973a) | patch
powerpc/mm: Ensure change_page_attr() doesn't invalidate pinned TLBs
authorChristophe Leroy <christophe.leroy@c-s.fr>
Wed, 2 Aug 2017 13:51:01 +0000 (15:51 +0200)
committerMichael Ellerman <mpe@ellerman.id.au>
Tue, 15 Aug 2017 12:55:56 +0000 (22:55 +1000)
commite611939fc8ec13387018df88083de7102a438730
tree3c37723e68ce2f7c565ece72eda0c5e9be32f10ftree | snapshot (tar.gz zip)
parent2ef973a9afc62077a13f7ac447d8a10fd79f3273commit | diff
powerpc/mm: Ensure change_page_attr() doesn't invalidate pinned TLBs

__change_page_attr() uses flush_tlb_page().
flush_tlb_page() uses tlbie instruction, which also invalidates
pinned TLBs, which is not what we expect.

This patch modifies the implementation to use flush_tlb_kernel_range()
instead. This will make use of tlbia which will preserve pinned TLBs.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
arch/powerpc/mm/pgtable_32.c diff | blob | blame | history