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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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11
drivers/acpi/power.c
View File

@@ -93,6 +93,7 @@ struct acpi_power_resource {
static struct list_head acpi_power_resource_list;
static const struct file_operations acpi_power_fops = {
.owner = THIS_MODULE,
.open = acpi_power_open_fs,
.read = seq_read,
.llseek = seq_lseek,
@@ -543,15 +544,11 @@ static int acpi_power_add_fs(struct acpi_device *device)
}
/* 'status' [R] */
entry = create_proc_entry(ACPI_POWER_FILE_STATUS,
S_IRUGO, acpi_device_dir(device));
entry = proc_create_data(ACPI_POWER_FILE_STATUS,
S_IRUGO, acpi_device_dir(device),
&acpi_power_fops, acpi_driver_data(device));
if (!entry)
return -EIO;
else {
entry->proc_fops = &acpi_power_fops;
entry->data = acpi_driver_data(device);
}
return 0;
}