s390: use non-racy method for proc entries creation

Use proc_create() to make sure that ->proc_fops be setup before gluing PDE to
main tree.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
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>

3 files changed, 10 insertions, 14 deletions

diff --git a/drivers/s390/block/dasd_proc.c b/drivers/s390/block/dasd_proc.c
index 8ae9406b10ad..03c0e40a92ff 100644
--- a/drivers/s390/block/dasd_proc.c
+++ b/drivers/s390/block/dasd_proc.c
@@ -157,6 +157,7 @@ static int dasd_devices_open(struct inode *inode, struct file *file)
 }
 
 static const struct file_operations dasd_devices_file_ops = {
+        .owner          = THIS_MODULE,
         .open           = dasd_devices_open,
         .read           = seq_read,
         .llseek         = seq_lseek,
@@ -315,13 +316,12 @@ dasd_proc_init(void)
         if (!dasd_proc_root_entry)
                 goto out_nodasd;
         dasd_proc_root_entry->owner = THIS_MODULE;
-        dasd_devices_entry = create_proc_entry("devices",
-                                               S_IFREG | S_IRUGO | S_IWUSR,
-                                               dasd_proc_root_entry);
+        dasd_devices_entry = proc_create("devices",
+                                         S_IFREG | S_IRUGO | S_IWUSR,
+                                         dasd_proc_root_entry,
+                                         &dasd_devices_file_ops);
         if (!dasd_devices_entry)
                 goto out_nodevices;
-        dasd_devices_entry->proc_fops = &dasd_devices_file_ops;
-        dasd_devices_entry->owner = THIS_MODULE;
         dasd_statistics_entry = create_proc_entry("statistics",
                                                   S_IFREG | S_IRUGO | S_IWUSR,
                                                   dasd_proc_root_entry);
diff --git a/drivers/s390/char/tape_proc.c b/drivers/s390/char/tape_proc.c
index 0c39636b2174..e7c888c14e71 100644
--- a/drivers/s390/char/tape_proc.c
+++ b/drivers/s390/char/tape_proc.c
@@ -111,6 +111,7 @@ static int tape_proc_open(struct inode *inode, struct file *file)
 
 static const struct file_operations tape_proc_ops =
 {
+        .owner          = THIS_MODULE,
         .open           = tape_proc_open,
         .read           = seq_read,
         .llseek         = seq_lseek,
@@ -124,14 +125,12 @@ void
 tape_proc_init(void)
 {
         tape_proc_devices =
-                create_proc_entry ("tapedevices", S_IFREG | S_IRUGO | S_IWUSR,
-                                   NULL);
+                proc_create("tapedevices", S_IFREG | S_IRUGO | S_IWUSR, NULL,
+                            &tape_proc_ops);
         if (tape_proc_devices == NULL) {
                 PRINT_WARN("tape: Cannot register procfs entry tapedevices\n");
                 return;
         }
-        tape_proc_devices->proc_fops = &tape_proc_ops;
-        tape_proc_devices->owner = THIS_MODULE;
 }
 
 /*
diff --git a/drivers/s390/cio/blacklist.c b/drivers/s390/cio/blacklist.c
index ef33d5df2229..40ef948fcb3a 100644
--- a/drivers/s390/cio/blacklist.c
+++ b/drivers/s390/cio/blacklist.c
@@ -374,13 +374,10 @@ cio_ignore_proc_init (void)
 {
         struct proc_dir_entry *entry;
 
-        entry = create_proc_entry ("cio_ignore", S_IFREG | S_IRUGO | S_IWUSR,
-                                   NULL);
+        entry = proc_create("cio_ignore", S_IFREG | S_IRUGO | S_IWUSR, NULL,
+                            &cio_ignore_proc_fops);
         if (!entry)
                 return -ENOENT;
-
-        entry->proc_fops = &cio_ignore_proc_fops;
-
         return 0;
 }