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authorDenis V. Lunev <den@openvz.org>2008-04-29 12:02:27 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-29 19:06:22 +0400
commitcf7acfab032ff262f42954328cdfd20a5d9aaaac (patch)
tree231698d72d4508f3b26f606f18ef844387ec43e5 /drivers/acpi/processor_idle.c
parent667471386d4068e75a6a55b615701ced61eb6333 (diff)
downloadlinux-cf7acfab032ff262f42954328cdfd20a5d9aaaac.tar.xz
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/processor_idle.c')
-rw-r--r--drivers/acpi/processor_idle.c13
1 files changed, 5 insertions, 8 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 0d90ff5fd117..789d4947ed31 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -1282,6 +1282,7 @@ static int acpi_processor_power_open_fs(struct inode *inode, struct file *file)
}
static const struct file_operations acpi_processor_power_fops = {
+ .owner = THIS_MODULE,
.open = acpi_processor_power_open_fs,
.read = seq_read,
.llseek = seq_lseek,
@@ -1822,16 +1823,12 @@ int __cpuinit acpi_processor_power_init(struct acpi_processor *pr,
}
/* 'power' [R] */
- entry = create_proc_entry(ACPI_PROCESSOR_FILE_POWER,
- S_IRUGO, acpi_device_dir(device));
+ entry = proc_create_data(ACPI_PROCESSOR_FILE_POWER,
+ S_IRUGO, acpi_device_dir(device),
+ &acpi_processor_power_fops,
+ acpi_driver_data(device));
if (!entry)
return -EIO;
- else {
- entry->proc_fops = &acpi_processor_power_fops;
- entry->data = acpi_driver_data(device);
- entry->owner = THIS_MODULE;
- }
-
return 0;
}