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acpi: use non-racy method for proc entries creation

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Use proc_create()/proc_create_data() to make sure that ->proc_fops and ->data
be setup before gluing PDE to main tree.

Add correct ->owner to proc_fops to fix reading/module unloading race.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Cc: Len Brown <lenb@kernel.org>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Denis V. Lunev
2008-04-29 01:02:27 -07:00
committed by Linus Torvalds
parent 667471386d
commit cf7acfab03
17 changed files with 162 additions and 264 deletions
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14
drivers/acpi/fan.c
View File

@@ -192,17 +192,13 @@ static int acpi_fan_add_fs(struct acpi_device *device)
}
/* 'status' [R/W] */
entry = create_proc_entry(ACPI_FAN_FILE_STATE,
S_IFREG | S_IRUGO | S_IWUSR,
acpi_device_dir(device));
entry = proc_create_data(ACPI_FAN_FILE_STATE,
S_IFREG | S_IRUGO | S_IWUSR,
acpi_device_dir(device),
&acpi_fan_state_ops,
device);
if (!entry)
return -ENODEV;
else {
entry->proc_fops = &acpi_fan_state_ops;
entry->data = device;
entry->owner = THIS_MODULE;
}
return 0;
}