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debugfs: remove return value of debugfs_create_u8()

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No one checks the return value of debugfs_create_u8(), as it's not
needed, so make the return value void, so that no one tries to do so in
the future.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20191011132931.1186197-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2019-10-11 15:29:24 +02:00
parent 0c580d8332
commit 9655ac4aca
3 changed files with 9 additions and 22 deletions
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4
Documentation/filesystems/debugfs.txt
View File

@ -68,8 +68,8 @@ actually necessary; the debugfs code provides a number of helper functions
for simple situations. Files containing a single integer value can be
created with any of:
struct dentry *debugfs_create_u8(const char *name, umode_t mode,
struct dentry *parent, u8 *value);
void debugfs_create_u8(const char *name, umode_t mode,
struct dentry *parent, u8 *value);
struct dentry *debugfs_create_u16(const char *name, umode_t mode,
struct dentry *parent, u16 *value);
struct dentry *debugfs_create_u32(const char *name, umode_t mode,

15
fs/debugfs/file.c
View File

@ -420,20 +420,11 @@ DEFINE_DEBUGFS_ATTRIBUTE(fops_u8_wo, NULL, debugfs_u8_set, "%llu\n");
* This function creates a file in debugfs with the given name that
* contains the value of the variable @value. If the @mode variable is so
* set, it can be read from, and written to.
*
* This function will return a pointer to a dentry if it succeeds. This
* pointer must be passed to the debugfs_remove() function when the file is
* to be removed (no automatic cleanup happens if your module is unloaded,
* you are responsible here.) If an error occurs, %ERR_PTR(-ERROR) will be
* returned.
*
* If debugfs is not enabled in the kernel, the value %ERR_PTR(-ENODEV) will
* be returned.
*/
struct dentry *debugfs_create_u8(const char *name, umode_t mode,
struct dentry *parent, u8 *value)
void debugfs_create_u8(const char *name, umode_t mode, struct dentry *parent,
u8 *value)
{
return debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u8,
debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u8,
&fops_u8_ro, &fops_u8_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_u8);

12
include/linux/debugfs.h
View File

@ -97,8 +97,8 @@ ssize_t debugfs_attr_write(struct file *file, const char __user *buf,
struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
struct dentry *new_dir, const char *new_name);
struct dentry *debugfs_create_u8(const char *name, umode_t mode,
struct dentry *parent, u8 *value);
void debugfs_create_u8(const char *name, umode_t mode, struct dentry *parent,
u8 *value);
struct dentry *debugfs_create_u16(const char *name, umode_t mode,
struct dentry *parent, u16 *value);
struct dentry *debugfs_create_u32(const char *name, umode_t mode,
@ -244,12 +244,8 @@ static inline struct dentry *debugfs_rename(struct dentry *old_dir, struct dentr
return ERR_PTR(-ENODEV);
}
static inline struct dentry *debugfs_create_u8(const char *name, umode_t mode,
struct dentry *parent,
u8 *value)
{
return ERR_PTR(-ENODEV);
}
static inline void debugfs_create_u8(const char *name, umode_t mode,
struct dentry *parent, u8 *value) { }
static inline struct dentry *debugfs_create_u16(const char *name, umode_t mode,
struct dentry *parent,