From: Michael Ellerman Date: Fri, 3 Apr 2015 03:11:53 +0000 (+1100) Subject: powerpc/cell: Fix crash in iic_setup_cpu() after per_cpu changes X-Git-Tag: firefly_0821_release~176^2~1959^2~50 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=b0dd00addc5035f87ec9c5820dacc1ebc7fcb3e6;p=firefly-linux-kernel-4.4.55.git powerpc/cell: Fix crash in iic_setup_cpu() after per_cpu changes The conversion from __get_cpu_var() to this_cpu_ptr() in iic_setup_cpu() is wrong. It causes an oops at boot. We need the per-cpu address of struct cpu_iic, not cpu_iic.regs->prio. Sparse noticed this, because we pass a non-iomem pointer to out_be64(), but we obviously don't check the sparse results often enough. Fixes: 69111bac42f5 ("powerpc: Replace __get_cpu_var uses") Signed-off-by: Michael Ellerman --- diff --git a/arch/powerpc/platforms/cell/interrupt.c b/arch/powerpc/platforms/cell/interrupt.c index 4c11421847be..3af8324c122e 100644 --- a/arch/powerpc/platforms/cell/interrupt.c +++ b/arch/powerpc/platforms/cell/interrupt.c @@ -163,7 +163,7 @@ static unsigned int iic_get_irq(void) void iic_setup_cpu(void) { - out_be64(this_cpu_ptr(&cpu_iic.regs->prio), 0xff); + out_be64(&this_cpu_ptr(&cpu_iic)->regs->prio, 0xff); } u8 iic_get_target_id(int cpu)