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c45361abb9
When CONFIG_SMP=y, timebase synchronization is required when the second
kernel is started.
arch/powerpc/kernel/smp.c:
int __cpu_up(unsigned int cpu, struct task_struct *tidle)
{
...
if (smp_ops->give_timebase)
smp_ops->give_timebase();
...
}
void start_secondary(void *unused)
{
...
if (smp_ops->take_timebase)
smp_ops->take_timebase();
...
}
When CONFIG_HOTPLUG_CPU=n and CONFIG_KEXEC_CORE=n,
smp_85xx_ops.give_timebase is NULL,
smp_85xx_ops.take_timebase is NULL,
As a result, the timebase is not synchronized.
Timebase synchronization does not depend on CONFIG_HOTPLUG_CPU.
Fixes: 56f1ba2807 ("powerpc/mpc85xx: refactor the PM operations")
Cc: stable@vger.kernel.org # v4.6+
Signed-off-by: Xiaoming Ni <nixiaoming@huawei.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210929033646.39630-3-nixiaoming@huawei.com
39 lines
1.3 KiB
Makefile
39 lines
1.3 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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#
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# Makefile for the PowerPC 85xx linux kernel.
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#
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obj-$(CONFIG_SMP) += smp.o
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ifneq ($(CONFIG_FSL_CORENET_RCPM),y)
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obj-$(CONFIG_SMP) += mpc85xx_pm_ops.o
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endif
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obj-y += common.o
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obj-$(CONFIG_BSC9131_RDB) += bsc913x_rdb.o
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obj-$(CONFIG_BSC9132_QDS) += bsc913x_qds.o
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obj-$(CONFIG_C293_PCIE) += c293pcie.o
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obj-$(CONFIG_MPC8540_ADS) += mpc85xx_ads.o
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obj-$(CONFIG_MPC8560_ADS) += mpc85xx_ads.o
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obj-$(CONFIG_MPC85xx_CDS) += mpc85xx_cds.o
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obj-$(CONFIG_MPC8536_DS) += mpc8536_ds.o
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obj-$(CONFIG_MPC85xx_DS) += mpc85xx_ds.o
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obj-$(CONFIG_MPC85xx_MDS) += mpc85xx_mds.o
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obj-$(CONFIG_MPC85xx_RDB) += mpc85xx_rdb.o
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obj-$(CONFIG_P1010_RDB) += p1010rdb.o
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obj-$(CONFIG_P1022_DS) += p1022_ds.o
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obj-$(CONFIG_P1022_RDK) += p1022_rdk.o
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obj-$(CONFIG_P1023_RDB) += p1023_rdb.o
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obj-$(CONFIG_TWR_P102x) += twr_p102x.o
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obj-$(CONFIG_CORENET_GENERIC) += corenet_generic.o
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obj-$(CONFIG_FB_FSL_DIU) += t1042rdb_diu.o
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obj-$(CONFIG_STX_GP3) += stx_gp3.o
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obj-$(CONFIG_TQM85xx) += tqm85xx.o
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obj-$(CONFIG_PPA8548) += ppa8548.o
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obj-$(CONFIG_SOCRATES) += socrates.o socrates_fpga_pic.o
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obj-$(CONFIG_KSI8560) += ksi8560.o
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obj-$(CONFIG_XES_MPC85xx) += xes_mpc85xx.o
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obj-$(CONFIG_GE_IMP3A) += ge_imp3a.o
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obj-$(CONFIG_PPC_QEMU_E500) += qemu_e500.o
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obj-$(CONFIG_SGY_CTS1000) += sgy_cts1000.o
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obj-$(CONFIG_MVME2500) += mvme2500.o
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