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debugfs: remove return value of debugfs_create_atomic_t() 

No one checks the return value of debugfs_create_atomic_t(), as it's not
needed, so make the return value void, so that no one tries to do so in
the future.

Link: https://lore.kernel.org/r/20191016130332.GA28240@kroah.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2019-10-16 06:03:32 -07:00
parent c7c1168909
commit 9927c6fa3e
3 changed files with 12 additions and 14 deletions
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2
Documentation/filesystems/debugfs.txt
View File

@ -113,7 +113,7 @@ lower-case values, or 1 or 0. Any other input will be silently ignored.
Also, atomic_t values can be placed in debugfs with:
struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode,
void debugfs_create_atomic_t(const char *name, umode_t mode,
struct dentry *parent, atomic_t *value)
A read of this file will get atomic_t values, and a write of this file

7
fs/debugfs/file.c
View File

@ -757,12 +757,11 @@ DEFINE_DEBUGFS_ATTRIBUTE(fops_atomic_t_wo, NULL, debugfs_atomic_t_set,
* @value: a pointer to the variable that the file should read to and write
* from.
*/
struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode,
void debugfs_create_atomic_t(const char *name, umode_t mode,
struct dentry *parent, atomic_t *value)
{
return debugfs_create_mode_unsafe(name, mode, parent, value,
&fops_atomic_t, &fops_atomic_t_ro,
&fops_atomic_t_wo);
debugfs_create_mode_unsafe(name, mode, parent, value, &fops_atomic_t,
&fops_atomic_t_ro, &fops_atomic_t_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_atomic_t);

11
include/linux/debugfs.h
View File

@ -117,7 +117,7 @@ void debugfs_create_x64(const char *name, umode_t mode, struct dentry *parent,
u64 *value);
void debugfs_create_size_t(const char *name, umode_t mode,
struct dentry *parent, size_t *value);
struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode,
void debugfs_create_atomic_t(const char *name, umode_t mode,
struct dentry *parent, atomic_t *value);
struct dentry *debugfs_create_bool(const char *name, umode_t mode,
struct dentry *parent, bool *value);
@ -284,11 +284,10 @@ static inline void debugfs_create_size_t(const char *name, umode_t mode,
struct dentry *parent, size_t *value)
{ }
static inline struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode,
struct dentry *parent, atomic_t *value)
{
return ERR_PTR(-ENODEV);
}
static inline void debugfs_create_atomic_t(const char *name, umode_t mode,
struct dentry *parent,
atomic_t *value)
{ }
static inline struct dentry *debugfs_create_bool(const char *name, umode_t mode,
struct dentry *parent,