bool cpu_report_death(void);
#endif /* #ifdef CONFIG_HOTPLUG_CPU */
+ /*
+ * These are used for a global "mitigations=" cmdline option for toggling
+ * optional CPU mitigations.
+ */
+ enum cpu_mitigations {
+ CPU_MITIGATIONS_OFF,
+ CPU_MITIGATIONS_AUTO,
+ };
+
+ extern enum cpu_mitigations cpu_mitigations;
+
+ /* mitigations=off */
+ static inline bool cpu_mitigations_off(void)
+ {
+ return cpu_mitigations == CPU_MITIGATIONS_OFF;
+ }
+
+#define IDLE_START 1
+#define IDLE_END 2
+
+void idle_notifier_register(struct notifier_block *n);
+void idle_notifier_unregister(struct notifier_block *n);
+void idle_notifier_call_chain(unsigned long val);
+
#endif /* _LINUX_CPU_H_ */
out_release:
cpu_hotplug_done();
+ trace_sched_cpu_hotplug(cpu, err, 0);
if (!err)
cpu_notify_nofail(CPU_POST_DEAD | mod, hcpu);
+ arch_smt_update();
return err;
}
__cpu_notify(CPU_UP_CANCELED | mod, hcpu, nr_calls, NULL);
out:
cpu_hotplug_done();
-
+ trace_sched_cpu_hotplug(cpu, ret, 1);
+ arch_smt_update();
return ret;
}
cpumask_copy(to_cpumask(cpu_online_bits), src);
}
+ enum cpu_mitigations cpu_mitigations = CPU_MITIGATIONS_AUTO;
+
+ static int __init mitigations_parse_cmdline(char *arg)
+ {
+ if (!strcmp(arg, "off"))
+ cpu_mitigations = CPU_MITIGATIONS_OFF;
+ else if (!strcmp(arg, "auto"))
+ cpu_mitigations = CPU_MITIGATIONS_AUTO;
+
+ return 0;
+ }
+ early_param("mitigations", mitigations_parse_cmdline);
++
+static ATOMIC_NOTIFIER_HEAD(idle_notifier);
+
+void idle_notifier_register(struct notifier_block *n)
+{
+ atomic_notifier_chain_register(&idle_notifier, n);
+}
+EXPORT_SYMBOL_GPL(idle_notifier_register);
+
+void idle_notifier_unregister(struct notifier_block *n)
+{
+ atomic_notifier_chain_unregister(&idle_notifier, n);
+}
+EXPORT_SYMBOL_GPL(idle_notifier_unregister);
+
+void idle_notifier_call_chain(unsigned long val)
+{
+ atomic_notifier_call_chain(&idle_notifier, val, NULL);
+}
+EXPORT_SYMBOL_GPL(idle_notifier_call_chain);
return rc;
}
- static int selinux_is_sblabel_mnt(struct super_block *sb)
+ static int selinux_is_genfs_special_handling(struct super_block *sb)
{
- struct superblock_security_struct *sbsec = sb->s_security;
-
- return sbsec->behavior == SECURITY_FS_USE_XATTR ||
- sbsec->behavior == SECURITY_FS_USE_TRANS ||
- sbsec->behavior == SECURITY_FS_USE_TASK ||
- sbsec->behavior == SECURITY_FS_USE_NATIVE ||
- /* Special handling. Genfs but also in-core setxattr handler */
- !strcmp(sb->s_type->name, "sysfs") ||
+ /* Special handling. Genfs but also in-core setxattr handler */
+ return !strcmp(sb->s_type->name, "sysfs") ||
!strcmp(sb->s_type->name, "pstore") ||
!strcmp(sb->s_type->name, "debugfs") ||
+ !strcmp(sb->s_type->name, "tracefs") ||
!strcmp(sb->s_type->name, "rootfs");
}
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