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authorChristophe Leroy <christophe.leroy@c-s.fr>2019-05-09 12:59:38 +0000
committerMichael Ellerman <mpe@ellerman.id.au>2019-05-14 22:58:52 +1000
commit397d2300b08cdee052053e362018cdb6dd65eea2 (patch)
treea6b19243288049b2e4dbda73bb7f3692bf1ba9de /arch/powerpc/mm/book3s32
parentb970afcfcabd63cd3832e95db096439c177c3592 (diff)
powerpc/32s: fix flush_hash_pages() on SMP
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>
Diffstat (limited to 'arch/powerpc/mm/book3s32')
-rw-r--r--arch/powerpc/mm/book3s32/hash_low.S3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/powerpc/mm/book3s32/hash_low.S b/arch/powerpc/mm/book3s32/hash_low.S
index e27792d0b744..8366c2abeafc 100644
--- a/arch/powerpc/mm/book3s32/hash_low.S
+++ b/arch/powerpc/mm/book3s32/hash_low.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