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debugfs: purge obsolete SRCU based removal protection

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Purge the SRCU based file removal race protection in favour of the new,
refcount based debugfs_file_get()/debugfs_file_put() API.

Fixes: 49d200deaa ("debugfs: prevent access to removed files' private data")
Signed-off-by: Nicolai Stange <nicstange@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Nicolai Stange
2017-10-31 00:15:52 +01:00
committed by Greg Kroah-Hartman
parent 7cda7b8f97
commit c9afbec270
4 changed files with 0 additions and 75 deletions
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19
include/linux/debugfs.h
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@@ -23,7 +23,6 @@
struct device;
struct file_operations;
struct srcu_struct;
struct debugfs_blob_wrapper {
void *data;
@@ -43,8 +42,6 @@ struct debugfs_regset32 {
extern struct dentry *arch_debugfs_dir;
extern struct srcu_struct debugfs_srcu;
#define DEFINE_DEBUGFS_ATTRIBUTE(__fops, __get, __set, __fmt) \
static int __fops ## _open(struct inode *inode, struct file *file) \
{ \
@@ -90,11 +87,6 @@ struct dentry *debugfs_create_automount(const char *name,
void debugfs_remove(struct dentry *dentry);
void debugfs_remove_recursive(struct dentry *dentry);
int debugfs_use_file_start(const struct dentry *dentry, int *srcu_idx)
__acquires(&debugfs_srcu);
void debugfs_use_file_finish(int srcu_idx) __releases(&debugfs_srcu);
const struct file_operations *debugfs_real_fops(const struct file *filp);
int debugfs_file_get(struct dentry *dentry);
@@ -227,17 +219,6 @@ static inline void debugfs_remove(struct dentry *dentry)
static inline void debugfs_remove_recursive(struct dentry *dentry)
{ }
static inline int debugfs_use_file_start(const struct dentry *dentry,
int *srcu_idx)
__acquires(&debugfs_srcu)
{
return 0;
}
static inline void debugfs_use_file_finish(int srcu_idx)
__releases(&debugfs_srcu)
{ }
static inline int debugfs_file_get(struct dentry *dentry)
{
return 0;