powerpc: 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: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.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>

1 files changed, 2 insertions, 4 deletions

diff --git a/arch/powerpc/kernel/lparcfg.c b/arch/powerpc/kernel/lparcfg.c
index 1ffacc698ffb..1e656b43ad7f 100644
--- a/arch/powerpc/kernel/lparcfg.c
+++ b/arch/powerpc/kernel/lparcfg.c
@@ -591,10 +591,8 @@ int __init lparcfg_init(void)
                         !firmware_has_feature(FW_FEATURE_ISERIES))
                 mode |= S_IWUSR;
 
-        ent = create_proc_entry("ppc64/lparcfg", mode, NULL);
-        if (ent) {
-                ent->proc_fops = &lparcfg_fops;
-        } else {
+        ent = proc_create("ppc64/lparcfg", mode, NULL, &lparcfg_fops);
+        if (!ent) {
                 printk(KERN_ERR "Failed to create ppc64/lparcfg\n");
                 return -EIO;
         }