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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
Download patch file Download diff file Expand all files Collapse all files

8
drivers/acpi/event.c
View file

@ -102,6 +102,7 @@ static unsigned int acpi_system_poll_event(struct file *file, poll_table * wait)
}
static const struct file_operations acpi_system_event_ops = {
.owner = THIS_MODULE,
.open = acpi_system_open_event,
.read = acpi_system_read_event,
.release = acpi_system_close_event,
@ -294,10 +295,9 @@ static int __init acpi_event_init(void)
#ifdef CONFIG_ACPI_PROC_EVENT
/* 'event' [R] */
entry = create_proc_entry("event", S_IRUSR, acpi_root_dir);
if (entry)
entry->proc_fops = &acpi_system_event_ops;
else
entry = proc_create("event", S_IRUSR, acpi_root_dir,
&acpi_system_event_ops);
if (!entry)
return -ENODEV;
#endif