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powerpc/32s: fix flush_hash_pages() on SMP

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flush_hash_pages() runs with data translation off, so current
task_struct has to be accesssed using physical address.

Fixes: f7354ccac8 ("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>
This commit is contained in:
Christophe Leroy 2019-05-09 12:59:38 +00:00 committed by Michael Ellerman
parent b970afcfca
commit 397d2300b0
1 changed files with 2 additions and 1 deletions
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3
arch/powerpc/mm/book3s32/hash_low.S
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@ -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