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authorDenis V. Lunev <den@openvz.org>2008-04-29 01:02:27 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-29 08:06:22 -0700
commitcf7acfab032ff262f42954328cdfd20a5d9aaaac (patch)
tree231698d72d4508f3b26f606f18ef844387ec43e5 /drivers/acpi/power.c
parent667471386d4068e75a6a55b615701ced61eb6333 (diff)
acpi: use non-racy method for proc entries creation
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>
Diffstat (limited to 'drivers/acpi/power.c')
-rw-r--r--drivers/acpi/power.c11
1 files changed, 4 insertions, 7 deletions
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index 76bf6d90c700..21fc8bf0d31f 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -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;
}