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Qi Liu 5345ede4ac drivers/perf: Prevent forced unbinding of PMU drivers 
[ Upstream commit f32ed8eb0e ]

Forcefully unbinding PMU drivers during perf sampling will lead to
a kernel panic, because the perf upper-layer framework call a NULL
pointer in this situation.

To solve this issue, "suppress_bind_attrs" should be set to true, so
that bind/unbind can be disabled via sysfs and prevent unbinding PMU
drivers during perf sampling.

Signed-off-by: Qi Liu <liuqi115@huawei.com>
Reviewed-by: John Garry <john.garry@huawei.com>
Link: https://lore.kernel.org/r/1594975763-32966-1-git-send-email-liuqi115@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2020-07-29 10:18:40 +02:00
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hisilicon drivers/perf: Prevent forced unbinding of PMU drivers 2020-07-29 10:18:40 +02:00
Kconfig
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Makefile
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arm-cci.c drivers/perf: Prevent forced unbinding of PMU drivers 2020-07-29 10:18:40 +02:00
arm-ccn.c drivers/perf: Prevent forced unbinding of PMU drivers 2020-07-29 10:18:40 +02:00
arm_dsu_pmu.c drivers/perf: Prevent forced unbinding of PMU drivers 2020-07-29 10:18:40 +02:00
arm_pmu.c
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arm_pmu_acpi.c
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arm_pmu_platform.c
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arm_smmuv3_pmu.c drivers/perf: Prevent forced unbinding of PMU drivers 2020-07-29 10:18:40 +02:00
arm_spe_pmu.c drivers/perf: Prevent forced unbinding of PMU drivers 2020-07-29 10:18:40 +02:00
fsl_imx8_ddr_perf.c drivers/perf: Prevent forced unbinding of PMU drivers 2020-07-29 10:18:40 +02:00
qcom_l2_pmu.c drivers/perf: Prevent forced unbinding of PMU drivers 2020-07-29 10:18:40 +02:00
qcom_l3_pmu.c drivers/perf: Prevent forced unbinding of PMU drivers 2020-07-29 10:18:40 +02:00
thunderx2_pmu.c drivers/perf: Prevent forced unbinding of PMU drivers 2020-07-29 10:18:40 +02:00
xgene_pmu.c drivers/perf: Prevent forced unbinding of PMU drivers 2020-07-29 10:18:40 +02:00