Commit e8732ffa authored Jun 13, 2019 by Christophe Leroy Committed by Michael Ellerman Jun 15, 2019

powerpc/booke: fix fast syscall entry on SMP



Use r10 instead of r9 to calculate CPU offset as r9 contains
the value from SRR1 which is used later.

Fixes: 1a4b739b ("powerpc/32: implement fast entry for syscalls on BOOKE")
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

parent b7f8b440

arch/powerpc/kernel/head_booke.h

+3 −3

Original line number	Diff line number	Diff line
		@@ -145,9 +145,9 @@ ALT_FTR_SECTION_END_IFSET(CPU_FTR_EMB_HV)
		tophys(r11,r11)
		addi r11,r11,global_dbcr0@l
		#ifdef CONFIG_SMP
		lwz r9,TASK_CPU(r2)
		slwi r9,r9,3
		add r11,r11,r9
		lwz r10, TASK_CPU(r2)
		slwi r10, r10, 3
		add r11, r11, r10
		#endif
		lwz r12,0(r11)
		mtspr SPRN_DBCR0,r12

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