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>

9 files changed, 17 insertions, 42 deletions

diff --git a/arch/powerpc/platforms/cell/spufs/sched.c b/arch/powerpc/platforms/cell/spufs/sched.c
index 00528ef84ad2..45dcd2693502 100644
--- a/arch/powerpc/platforms/cell/spufs/sched.c
+++ b/arch/powerpc/platforms/cell/spufs/sched.c
@@ -1063,10 +1063,9 @@ int __init spu_sched_init(void)
 
         mod_timer(&spuloadavg_timer, 0);
 
-        entry = create_proc_entry("spu_loadavg", 0, NULL);
+        entry = proc_create("spu_loadavg", 0, NULL, &spu_loadavg_fops);
         if (!entry)
                 goto out_stop_kthread;
-        entry->proc_fops = &spu_loadavg_fops;
 
         pr_debug("spusched: tick: %d, min ticks: %d, default ticks: %d\n",
                         SPUSCHED_TICK, MIN_SPU_TIMESLICE, DEF_SPU_TIMESLICE);
diff --git a/arch/powerpc/platforms/cell/spufs/sputrace.c b/arch/powerpc/platforms/cell/spufs/sputrace.c
index 79aa773f3c99..aea5286f1245 100644
--- a/arch/powerpc/platforms/cell/spufs/sputrace.c
+++ b/arch/powerpc/platforms/cell/spufs/sputrace.c
@@ -201,10 +201,9 @@ static int __init sputrace_init(void)
         if (!sputrace_log)
                 goto out;
 
-        entry = create_proc_entry("sputrace", S_IRUSR, NULL);
+        entry = proc_create("sputrace", S_IRUSR, NULL, &sputrace_fops);
         if (!entry)
                 goto out_free_log;
-        entry->proc_fops = &sputrace_fops;
 
         for (i = 0; i < ARRAY_SIZE(spu_probes); i++) {
                 struct spu_probe *p = &spu_probes[i];
diff --git a/arch/powerpc/platforms/iseries/lpevents.c b/arch/powerpc/platforms/iseries/lpevents.c
index e5b40e3e0082..b0f8a857ec02 100644
--- a/arch/powerpc/platforms/iseries/lpevents.c
+++ b/arch/powerpc/platforms/iseries/lpevents.c
@@ -330,15 +330,11 @@ static const struct file_operations proc_lpevents_operations = {
 
 static int __init proc_lpevents_init(void)
 {
-        struct proc_dir_entry *e;
-
         if (!firmware_has_feature(FW_FEATURE_ISERIES))
                 return 0;
 
-        e = create_proc_entry("iSeries/lpevents", S_IFREG|S_IRUGO, NULL);
-        if (e)
-                e->proc_fops = &proc_lpevents_operations;
-
+        proc_create("iSeries/lpevents", S_IFREG|S_IRUGO, NULL,
+                    &proc_lpevents_operations);
         return 0;
 }
 __initcall(proc_lpevents_init);
diff --git a/arch/powerpc/platforms/iseries/mf.c b/arch/powerpc/platforms/iseries/mf.c
index c0f2433bc16e..1dc7295746da 100644
--- a/arch/powerpc/platforms/iseries/mf.c
+++ b/arch/powerpc/platforms/iseries/mf.c
@@ -1255,11 +1255,11 @@ static int __init mf_proc_init(void)
                 if (i == 3)     /* no vmlinux entry for 'D' */
                         continue;
 
-                ent = create_proc_entry("vmlinux", S_IFREG|S_IWUSR, mf);
+                ent = proc_create_data("vmlinux", S_IFREG|S_IWUSR, mf,
+                                       &proc_vmlinux_operations,
+                                       (void *)(long)i);
                 if (!ent)
                         return 1;
-                ent->data = (void *)(long)i;
-                ent->proc_fops = &proc_vmlinux_operations;
         }
 
         ent = create_proc_entry("side", S_IFREG|S_IRUSR|S_IWUSR, mf_proc_root);
diff --git a/arch/powerpc/platforms/iseries/proc.c b/arch/powerpc/platforms/iseries/proc.c
index f2cde4180204..91f4c6cd4b99 100644
--- a/arch/powerpc/platforms/iseries/proc.c
+++ b/arch/powerpc/platforms/iseries/proc.c
@@ -110,15 +110,11 @@ static const struct file_operations proc_titantod_operations = {
 
 static int __init iseries_proc_init(void)
 {
-        struct proc_dir_entry *e;
-
         if (!firmware_has_feature(FW_FEATURE_ISERIES))
                 return 0;
 
-        e = create_proc_entry("iSeries/titanTod", S_IFREG|S_IRUGO, NULL);
-        if (e)
-                e->proc_fops = &proc_titantod_operations;
-
+        proc_create("iSeries/titanTod", S_IFREG|S_IRUGO, NULL,
+                    &proc_titantod_operations);
         return 0;
 }
 __initcall(iseries_proc_init);
diff --git a/arch/powerpc/platforms/iseries/viopath.c b/arch/powerpc/platforms/iseries/viopath.c
index df23331eb25c..49ff4dc422b7 100644
--- a/arch/powerpc/platforms/iseries/viopath.c
+++ b/arch/powerpc/platforms/iseries/viopath.c
@@ -180,15 +180,10 @@ static const struct file_operations proc_viopath_operations = {
 
 static int __init vio_proc_init(void)
 {
-        struct proc_dir_entry *e;
-
         if (!firmware_has_feature(FW_FEATURE_ISERIES))
                 return 0;
 
-        e = create_proc_entry("iSeries/config", 0, NULL);
-        if (e)
-                e->proc_fops = &proc_viopath_operations;
-
+        proc_create("iSeries/config", 0, NULL, &proc_viopath_operations);
         return 0;
 }
 __initcall(vio_proc_init);
diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c
index a3fd56b186e6..6f544ba4b37f 100644
--- a/arch/powerpc/platforms/pseries/eeh.c
+++ b/arch/powerpc/platforms/pseries/eeh.c
@@ -1259,14 +1259,8 @@ static const struct file_operations proc_eeh_operations = {
 
 static int __init eeh_init_proc(void)
 {
-        struct proc_dir_entry *e;
-
-        if (machine_is(pseries)) {
-                e = create_proc_entry("ppc64/eeh", 0, NULL);
-                if (e)
-                        e->proc_fops = &proc_eeh_operations;
-        }
-
+        if (machine_is(pseries))
+                proc_create("ppc64/eeh", 0, NULL, &proc_eeh_operations);
         return 0;
 }
 __initcall(eeh_init_proc);
diff --git a/arch/powerpc/platforms/pseries/reconfig.c b/arch/powerpc/platforms/pseries/reconfig.c
index ac75c10de278..75769aae41d5 100644
--- a/arch/powerpc/platforms/pseries/reconfig.c
+++ b/arch/powerpc/platforms/pseries/reconfig.c
@@ -512,12 +512,9 @@ static int proc_ppc64_create_ofdt(void)
         if (!machine_is(pseries))
                 return 0;
 
-        ent = create_proc_entry("ppc64/ofdt", S_IWUSR, NULL);
-        if (ent) {
-                ent->data = NULL;
+        ent = proc_create("ppc64/ofdt", S_IWUSR, NULL, &ofdt_fops);
+        if (ent)
                 ent->size = 0;
-                ent->proc_fops = &ofdt_fops;
-        }
 
         return 0;
 }
diff --git a/arch/powerpc/platforms/pseries/rtasd.c b/arch/powerpc/platforms/pseries/rtasd.c
index befadd4f9524..7d3e2b0bd4d2 100644
--- a/arch/powerpc/platforms/pseries/rtasd.c
+++ b/arch/powerpc/platforms/pseries/rtasd.c
@@ -468,10 +468,9 @@ static int __init rtas_init(void)
                 return -ENOMEM;
         }
 
-        entry = create_proc_entry("ppc64/rtas/error_log", S_IRUSR, NULL);
-        if (entry)
-                entry->proc_fops = &proc_rtas_log_operations;
-        else
+        entry = proc_create("ppc64/rtas/error_log", S_IRUSR, NULL,
+                            &proc_rtas_log_operations);
+        if (!entry)
                 printk(KERN_ERR "Failed to create error_log proc entry\n");
 
         if (kernel_thread(rtasd, NULL, CLONE_FS) < 0)