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path: root/fs/proc/generic.c
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Diffstat (limited to 'fs/proc/generic.c')
-rw-r--r--fs/proc/generic.c44
1 files changed, 22 insertions, 22 deletions
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index e5dee5c3188e..ff3ffc76a937 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -26,7 +26,7 @@
#include "internal.h"
-static DEFINE_SPINLOCK(proc_subdir_lock);
+static DEFINE_RWLOCK(proc_subdir_lock);
static int proc_match(unsigned int len, const char *name, struct proc_dir_entry *de)
{
@@ -172,9 +172,9 @@ static int xlate_proc_name(const char *name, struct proc_dir_entry **ret,
{
int rv;
- spin_lock(&proc_subdir_lock);
+ read_lock(&proc_subdir_lock);
rv = __xlate_proc_name(name, ret, residual);
- spin_unlock(&proc_subdir_lock);
+ read_unlock(&proc_subdir_lock);
return rv;
}
@@ -231,11 +231,11 @@ struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *dir,
{
struct inode *inode;
- spin_lock(&proc_subdir_lock);
+ read_lock(&proc_subdir_lock);
de = pde_subdir_find(de, dentry->d_name.name, dentry->d_name.len);
if (de) {
pde_get(de);
- spin_unlock(&proc_subdir_lock);
+ read_unlock(&proc_subdir_lock);
inode = proc_get_inode(dir->i_sb, de);
if (!inode)
return ERR_PTR(-ENOMEM);
@@ -243,7 +243,7 @@ struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *dir,
d_add(dentry, inode);
return NULL;
}
- spin_unlock(&proc_subdir_lock);
+ read_unlock(&proc_subdir_lock);
return ERR_PTR(-ENOENT);
}
@@ -270,12 +270,12 @@ int proc_readdir_de(struct proc_dir_entry *de, struct file *file,
if (!dir_emit_dots(file, ctx))
return 0;
- spin_lock(&proc_subdir_lock);
+ read_lock(&proc_subdir_lock);
de = pde_subdir_first(de);
i = ctx->pos - 2;
for (;;) {
if (!de) {
- spin_unlock(&proc_subdir_lock);
+ read_unlock(&proc_subdir_lock);
return 0;
}
if (!i)
@@ -287,19 +287,19 @@ int proc_readdir_de(struct proc_dir_entry *de, struct file *file,
do {
struct proc_dir_entry *next;
pde_get(de);
- spin_unlock(&proc_subdir_lock);
+ read_unlock(&proc_subdir_lock);
if (!dir_emit(ctx, de->name, de->namelen,
de->low_ino, de->mode >> 12)) {
pde_put(de);
return 0;
}
- spin_lock(&proc_subdir_lock);
+ read_lock(&proc_subdir_lock);
ctx->pos++;
next = pde_subdir_next(de);
pde_put(de);
de = next;
} while (de);
- spin_unlock(&proc_subdir_lock);
+ read_unlock(&proc_subdir_lock);
return 1;
}
@@ -338,16 +338,16 @@ static int proc_register(struct proc_dir_entry * dir, struct proc_dir_entry * dp
if (ret)
return ret;
- spin_lock(&proc_subdir_lock);
+ write_lock(&proc_subdir_lock);
dp->parent = dir;
if (pde_subdir_insert(dir, dp) == false) {
WARN(1, "proc_dir_entry '%s/%s' already registered\n",
dir->name, dp->name);
- spin_unlock(&proc_subdir_lock);
+ write_unlock(&proc_subdir_lock);
proc_free_inum(dp->low_ino);
return -EEXIST;
}
- spin_unlock(&proc_subdir_lock);
+ write_unlock(&proc_subdir_lock);
return 0;
}
@@ -549,9 +549,9 @@ void remove_proc_entry(const char *name, struct proc_dir_entry *parent)
const char *fn = name;
unsigned int len;
- spin_lock(&proc_subdir_lock);
+ write_lock(&proc_subdir_lock);
if (__xlate_proc_name(name, &parent, &fn) != 0) {
- spin_unlock(&proc_subdir_lock);
+ write_unlock(&proc_subdir_lock);
return;
}
len = strlen(fn);
@@ -559,7 +559,7 @@ void remove_proc_entry(const char *name, struct proc_dir_entry *parent)
de = pde_subdir_find(parent, fn, len);
if (de)
rb_erase(&de->subdir_node, &parent->subdir);
- spin_unlock(&proc_subdir_lock);
+ write_unlock(&proc_subdir_lock);
if (!de) {
WARN(1, "name '%s'\n", name);
return;
@@ -583,16 +583,16 @@ int remove_proc_subtree(const char *name, struct proc_dir_entry *parent)
const char *fn = name;
unsigned int len;
- spin_lock(&proc_subdir_lock);
+ write_lock(&proc_subdir_lock);
if (__xlate_proc_name(name, &parent, &fn) != 0) {
- spin_unlock(&proc_subdir_lock);
+ write_unlock(&proc_subdir_lock);
return -ENOENT;
}
len = strlen(fn);
root = pde_subdir_find(parent, fn, len);
if (!root) {
- spin_unlock(&proc_subdir_lock);
+ write_unlock(&proc_subdir_lock);
return -ENOENT;
}
rb_erase(&root->subdir_node, &parent->subdir);
@@ -605,7 +605,7 @@ int remove_proc_subtree(const char *name, struct proc_dir_entry *parent)
de = next;
continue;
}
- spin_unlock(&proc_subdir_lock);
+ write_unlock(&proc_subdir_lock);
proc_entry_rundown(de);
next = de->parent;
@@ -616,7 +616,7 @@ int remove_proc_subtree(const char *name, struct proc_dir_entry *parent)
break;
pde_put(de);
- spin_lock(&proc_subdir_lock);
+ write_lock(&proc_subdir_lock);
de = next;
}
pde_put(root);