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debugfs: remove return value of debugfs_create_u64()

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No one checks the return value of debugfs_create_u64(), 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/20191011132931.1186197-3-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman
2019-10-11 15:29:26 +02:00
parent 313f5dbba4
commit ad26221fb9
3 changed files with 9 additions and 22 deletions
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4
Documentation/filesystems/debugfs.txt
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@@ -74,8 +74,8 @@ created with any of:
struct dentry *parent, u16 *value); struct dentry *parent, u16 *value);
struct dentry *debugfs_create_u32(const char *name, umode_t mode, struct dentry *debugfs_create_u32(const char *name, umode_t mode,
struct dentry *parent, u32 *value); struct dentry *parent, u32 *value);
struct dentry *debugfs_create_u64(const char *name, umode_t mode, void debugfs_create_u64(const char *name, umode_t mode,
struct dentry *parent, u64 *value); struct dentry *parent, u64 *value);
These files support both reading and writing the given value; if a specific These files support both reading and writing the given value; if a specific
file should not be written to, simply set the mode bits accordingly. The file should not be written to, simply set the mode bits accordingly. The

15
fs/debugfs/file.c
View File

@@ -538,20 +538,11 @@ DEFINE_DEBUGFS_ATTRIBUTE(fops_u64_wo, NULL, debugfs_u64_set, "%llu\n");
* This function creates a file in debugfs with the given name that * 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 * contains the value of the variable @value. If the @mode variable is so
* set, it can be read from, and written to. * 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_u64(const char *name, umode_t mode, void debugfs_create_u64(const char *name, umode_t mode, struct dentry *parent,
struct dentry *parent, u64 *value) u64 *value)
{ {
return debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u64, debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u64,
&fops_u64_ro, &fops_u64_wo); &fops_u64_ro, &fops_u64_wo);
} }
EXPORT_SYMBOL_GPL(debugfs_create_u64); EXPORT_SYMBOL_GPL(debugfs_create_u64);

12
include/linux/debugfs.h
View File

@@ -103,8 +103,8 @@ void debugfs_create_u16(const char *name, umode_t mode, struct dentry *parent,
u16 *value); u16 *value);
struct dentry *debugfs_create_u32(const char *name, umode_t mode, struct dentry *debugfs_create_u32(const char *name, umode_t mode,
struct dentry *parent, u32 *value); struct dentry *parent, u32 *value);
struct dentry *debugfs_create_u64(const char *name, umode_t mode, void debugfs_create_u64(const char *name, umode_t mode, struct dentry *parent,
struct dentry *parent, u64 *value); u64 *value);
struct dentry *debugfs_create_ulong(const char *name, umode_t mode, struct dentry *debugfs_create_ulong(const char *name, umode_t mode,
struct dentry *parent, unsigned long *value); struct dentry *parent, unsigned long *value);
struct dentry *debugfs_create_x8(const char *name, umode_t mode, struct dentry *debugfs_create_x8(const char *name, umode_t mode,
@@ -257,12 +257,8 @@ static inline struct dentry *debugfs_create_u32(const char *name, umode_t mode,
return ERR_PTR(-ENODEV); return ERR_PTR(-ENODEV);
} }
static inline struct dentry *debugfs_create_u64(const char *name, umode_t mode, static inline void debugfs_create_u64(const char *name, umode_t mode,
struct dentry *parent, struct dentry *parent, u64 *value) { }
u64 *value)
{
return ERR_PTR(-ENODEV);
}
static inline struct dentry *debugfs_create_ulong(const char *name, static inline struct dentry *debugfs_create_ulong(const char *name,
umode_t mode, umode_t mode,