From: Christophe Leroy christophe.leroy@c-s.fr
commit 397d2300b08cdee052053e362018cdb6dd65eea2 upstream.
flush_hash_pages() runs with data translation off, so current task_struct has to be accesssed using physical address.
Fixes: f7354ccac844 ("powerpc/32: Remove CURRENT_THREAD_INFO and rename TI_CPU") Cc: stable@vger.kernel.org # v5.1+ Reported-by: Erhard F. erhard_f@mailbox.org Signed-off-by: Christophe Leroy christophe.leroy@c-s.fr Signed-off-by: Michael Ellerman mpe@ellerman.id.au Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/powerpc/mm/hash_low_32.S | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/arch/powerpc/mm/hash_low_32.S +++ b/arch/powerpc/mm/hash_low_32.S @@ -539,7 +539,8 @@ _GLOBAL(flush_hash_pages) #ifdef CONFIG_SMP lis r9, (mmu_hash_lock - PAGE_OFFSET)@ha addi r9, r9, (mmu_hash_lock - PAGE_OFFSET)@l - lwz r8,TASK_CPU(r2) + tophys (r8, r2) + lwz r8, TASK_CPU(r8) oris r8,r8,9 10: lwarx r0,0,r9 cmpi 0,r0,0