[PATCH 26/29] kernel: use non-racy method for proc entries creation

Denis V. Lunev
2008-04-08T11:25:38Z

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

Signed-off-by: Denis V. Lunev <den@openvz.org>
---
kernel/configs.c | 4 ++--
kernel/dma.c | 7 +------
kernel/kallsyms.c | 6 +-----
kernel/latencytop.c | 9 +--------
kernel/lockdep_proc.c | 16 ++++------------
kernel/profile.c | 4 ++--
kernel/resource.c | 10 ++--------
kernel/sched_debug.c | 5 +----
kernel/time/timer_list.c | 5 +----
kernel/time/timer_stats.c | 5 +----
10 files changed, 16 insertions(+), 55 deletions(-)

diff --git a/kernel/configs.c b/kernel/configs.c
index d3a4b82..4c34521 100644
--- a/kernel/configs.c
+++ b/kernel/configs.c
@@ -79,11 +79,11 @@ static int __init ikconfig_init(void)
struct proc_dir_entry *entry;

/* create the current config file */
- entry = create_proc_entry("config.gz", S_IFREG | S_IRUGO, NULL);
+ entry = proc_create("config.gz", S_IFREG | S_IRUGO, NULL,
+ &ikconfig_file_ops);
if (!entry)
return -ENOMEM;

- entry->proc_fops = &ikconfig_file_ops;
entry->size = kernel_config_data_size;

return 0;
diff --git a/kernel/dma.c b/kernel/dma.c
index 6a82bb7..d2c60a8 100644
--- a/kernel/dma.c
+++ b/kernel/dma.c
@@ -149,12 +149,7 @@ static const struct file_operations proc_dma_operations = {

static int __init proc_dma_init(void)
{
- struct proc_dir_entry *e;
-
- e = create_proc_entry("dma", 0, NULL);
- if (e)
- e->proc_fops = &proc_dma_operations;
-
+ proc_create("dma", 0, NULL, &proc_dma_operations);
return 0;
}

diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
index f091d13..6fc0040 100644
--- a/kernel/kallsyms.c
+++ b/kernel/kallsyms.c
@@ -472,11 +472,7 @@ static const struct file_operations kallsyms_operations = {

static int __init kallsyms_init(void)
{
- struct proc_dir_entry *entry;
-
- entry = create_proc_entry("kallsyms", 0444, NULL);
- if (entry)
- entry->proc_fops = &kallsyms_operations;
+ proc_create("kallsyms", 0444, NULL, &kallsyms_operations);
return 0;
}
__initcall(kallsyms_init);
diff --git a/kernel/latencytop.c b/kernel/latencytop.c
index 7c74dab..5e7b45c 100644
--- a/kernel/latencytop.c
+++ b/kernel/latencytop.c
@@ -233,14 +233,7 @@ static struct file_operations lstats_fops = {

static int __init init_lstats_procfs(void)
{
- struct proc_dir_entry *pe;
-
- pe = create_proc_entry("latency_stats", 0644, NULL);
- if (!pe)
- return -ENOMEM;
-
- pe->proc_fops = &lstats_fops;
-
+ proc_create("latency_stats", 0644, NULL, &lstats_fops);
return 0;
}
__initcall(init_lstats_procfs);
diff --git a/kernel/lockdep_proc.c b/kernel/lockdep_proc.c
index 8a135bd..dc5d296 100644
--- a/kernel/lockdep_proc.c
+++ b/kernel/lockdep_proc.c
@@ -660,20 +660,12 @@ static const struct file_operations proc_lock_stat_operations = {

static int __init lockdep_proc_init(void)
{
- struct proc_dir_entry *entry;
-
- entry = create_proc_entry("lockdep", S_IRUSR, NULL);
- if (entry)
- entry->proc_fops = &proc_lockdep_operations;
-
- entry = create_proc_entry("lockdep_stats", S_IRUSR, NULL);
- if (entry)
- entry->proc_fops = &proc_lockdep_stats_operations;
+ proc_create("lockdep", S_IRUSR, NULL, &proc_lockdep_operations);
+ proc_create("lockdep_stats", S_IRUSR, NULL,
+ &proc_lockdep_stats_operations);

#ifdef CONFIG_LOCK_STAT
- entry = create_proc_entry("lock_stat", S_IRUSR, NULL);
- if (entry)
- entry->proc_fops = &proc_lock_stat_operations;
+ proc_create("lock_stat", S_IRUSR, NULL, &proc_lock_stat_operations);
#endif

return 0;
diff --git a/kernel/profile.c b/kernel/profile.c
index 3b7a1b0..1a21762 100644
--- a/kernel/profile.c
+++ b/kernel/profile.c
@@ -588,10 +588,10 @@ static int __init create_proc_profile(void)
return 0;
if (create_hash_tables())
return -1;
- entry = create_proc_entry("profile", S_IWUSR | S_IRUGO, NULL);
+ entry = proc_create("profile", S_IWUSR | S_IRUGO,
+ NULL, &proc_profile_operations);
if (!entry)
return 0;
- entry->proc_fops = &proc_profile_operations;
entry->size = (1+prof_len) * sizeof(atomic_t);
hotcpu_notifier(profile_cpu_callback, 0);
return 0;
diff --git a/kernel/resource.c b/kernel/resource.c
index 46ad4f4..da8ee1b 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -131,14 +131,8 @@ static const struct file_operations proc_iomem_operations = {

static int __init ioresources_init(void)
{
- struct proc_dir_entry *entry;
-
- entry = create_proc_entry("ioports", 0, NULL);
- if (entry)
- entry->proc_fops = &proc_ioports_operations;
- entry = create_proc_entry("iomem", 0, NULL);
- if (entry)
- entry->proc_fops = &proc_iomem_operations;
+ proc_create("ioports", 0, NULL, &proc_ioports_operations);
+ proc_create("iomem", 0, NULL, &proc_iomem_operations);
return 0;
}
__initcall(ioresources_init);
diff --git a/kernel/sched_debug.c b/kernel/sched_debug.c
index 475b5ad..08dddd7 100644
--- a/kernel/sched_debug.c
+++ b/kernel/sched_debug.c
@@ -248,12 +248,9 @@ static int __init init_sched_debug_procfs(void)
{
struct proc_dir_entry *pe;

- pe = create_proc_entry("sched_debug", 0644, NULL);
+ pe = proc_create("sched_debug", 0644, NULL, &sched_debug_fops);
if (!pe)
return -ENOMEM;
-
- pe->proc_fops = &sched_debug_fops;
-
return 0;
}

diff --git a/kernel/time/timer_list.c b/kernel/time/timer_list.c
index 67fe8fc..a40e20f 100644
--- a/kernel/time/timer_list.c
+++ b/kernel/time/timer_list.c
@@ -278,12 +278,9 @@ static int __init init_timer_list_procfs(void)
{
struct proc_dir_entry *pe;

- pe = create_proc_entry("timer_list", 0644, NULL);
+ pe = proc_create("timer_list", 0644, NULL, &timer_list_fops);
if (!pe)
return -ENOMEM;
-
- pe->proc_fops = &timer_list_fops;
-
return 0;
}
__initcall(init_timer_list_procfs);
diff --git a/kernel/time/timer_stats.c b/kernel/time/timer_stats.c
index 417da8c..c994530 100644
--- a/kernel/time/timer_stats.c
+++ b/kernel/time/timer_stats.c
@@ -415,12 +415,9 @@ static int __init init_tstats_procfs(void)
{
struct proc_dir_entry *pe;

- pe = create_proc_entry("timer_stats", 0644, NULL);
+ pe = proc_create("timer_stats", 0644, NULL, &tstats_fops);
if (!pe)
return -ENOMEM;
-
- pe->proc_fops = &tstats_fops;
-
return 0;
}
__initcall(init_tstats_procfs);
--
1.5.3.rc5