powerpc/mm: Ensure change_page_attr() doesn't invalidate pinned TLBs

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__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>

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Christophe Leroy 2017-08-02 15:51:01 +02:00 • committed by Michael Ellerman

parent 2ef973a9af

commit e611939fc8

1 changed files with 6 additions and 4 deletions

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arch/powerpc/mm/pgtable_32.c

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