static int err_inject_init(void)
{
int err;
dir = notifier_err_inject_init("memory", notifier_err_inject_dir,
&memory_notifier_err_inject, priority);
if (IS_ERR(dir))
return PTR_ERR(dir);
err = register_memory_notifier(&memory_notifier_err_inject.nb);
if (err)
debugfs_remove_recursive(dir);
return err;
}
/**
* cmm_init - Module initialization
*
* Return value:
* 0 on success / other on failure
**/
static int cmm_init(void)
{
int rc = -ENOMEM;
if (!firmware_has_feature(FW_FEATURE_CMO))
return -EOPNOTSUPP;
if ((rc = register_oom_notifier(&cmm_oom_nb)) < 0)
return rc;
if ((rc = register_reboot_notifier(&cmm_reboot_nb)))
goto out_oom_notifier;
if ((rc = cmm_sysfs_register(&cmm_dev)))
goto out_reboot_notifier;
if (register_memory_notifier(&cmm_mem_nb) ||
register_memory_isolate_notifier(&cmm_mem_isolate_nb))
goto out_unregister_notifier;
if (cmm_disabled)
return rc;
cmm_thread_ptr = kthread_run(cmm_thread, NULL, "cmmthread");
if (IS_ERR(cmm_thread_ptr)) {
rc = PTR_ERR(cmm_thread_ptr);
goto out_unregister_notifier;
}
return rc;
out_unregister_notifier:
unregister_memory_notifier(&cmm_mem_nb);
unregister_memory_isolate_notifier(&cmm_mem_isolate_nb);
cmm_unregister_sysfs(&cmm_dev);
out_reboot_notifier:
unregister_reboot_notifier(&cmm_reboot_nb);
out_oom_notifier:
unregister_oom_notifier(&cmm_oom_nb);
return rc;
}
/*
* Reserve memory for kdump kernel to be loaded with kexec
*/
static void __init reserve_crashkernel(void)
{
#ifdef CONFIG_CRASH_DUMP
unsigned long long crash_base, crash_size;
char *msg;
int rc;
rc = parse_crashkernel(boot_command_line, memory_end, &crash_size,
&crash_base);
if (rc || crash_size == 0)
return;
crash_base = ALIGN(crash_base, KEXEC_CRASH_MEM_ALIGN);
crash_size = ALIGN(crash_size, KEXEC_CRASH_MEM_ALIGN);
if (register_memory_notifier(&kdump_mem_nb))
return;
if (!crash_base)
crash_base = find_crash_base(crash_size, &msg);
if (!crash_base) {
pr_info("crashkernel reservation failed: %s\n", msg);
unregister_memory_notifier(&kdump_mem_nb);
return;
}
if (verify_crash_base(crash_base, crash_size, &msg)) {
pr_info("crashkernel reservation failed: %s\n", msg);
unregister_memory_notifier(&kdump_mem_nb);
return;
}
if (!OLDMEM_BASE && MACHINE_IS_VM)
diag10_range(PFN_DOWN(crash_base), PFN_DOWN(crash_size));
crashk_res.start = crash_base;
crashk_res.end = crash_base + crash_size - 1;
insert_resource(&iomem_resource, &crashk_res);
reserve_kdump_bootmem(crash_base, crash_size, CHUNK_CRASHK);
pr_info("Reserving %lluMB of memory at %lluMB "
"for crashkernel (System RAM: %luMB)\n",
crash_size >> 20, crash_base >> 20, memory_end >> 20);
#endif
}
