[Bug 203125] Kernel 5.1-rc1 fails to boot on a PowerMac G4 3,6: Caused by (from SRR1=141020): Transfer error ack signal

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=203125

--- Comment #6 from Christophe Leroy (christophe.leroy at c-s.fr) ---
Try followin change:

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

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