Commit 397d2300 authored May 09, 2019 by Christophe Leroy Committed by Michael Ellerman May 14, 2019

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: f7354cca ("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>

parent b970afcf

arch/powerpc/mm/book3s32/hash_low.S

+2 −1

Original line number	Diff line number	Diff line
		@@ -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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