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, 3 deletions

diff --git a/arch/powerpc/kernel/proc_ppc64.c b/arch/powerpc/kernel/proc_ppc64.c
index f78dfce1b771..c647ddef40dc 100644
--- a/arch/powerpc/kernel/proc_ppc64.c
+++ b/arch/powerpc/kernel/proc_ppc64.c
@@ -68,12 +68,11 @@ static int __init proc_ppc64_init(void)
 {
         struct proc_dir_entry *pde;
 
-        pde = create_proc_entry("ppc64/systemcfg", S_IFREG|S_IRUGO, NULL);
+        pde = proc_create_data("ppc64/systemcfg", S_IFREG|S_IRUGO, NULL,
+                               &page_map_fops, vdso_data);
         if (!pde)
                 return 1;
-        pde->data = vdso_data;
         pde->size = PAGE_SIZE;
-        pde->proc_fops = &page_map_fops;
 
         return 0;
 }