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| author | Richard Fitzgerald <rf@opensource.wolfsonmicro.com> | 2015-06-23 16:32:54 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-07-20 20:44:50 +0300 |
| commit | 0642ef6f2992eba46c41abb5ceb7d4fa14ba888e (patch) | |
| tree | fd4fe479afa4f75a2b599ef3f450d9fee5b7ff6e | |
| parent | bc0195aad0daa2ad5b0d76cce22b167bc3435590 (diff) | |
| download | linux-0642ef6f2992eba46c41abb5ceb7d4fa14ba888e.tar.xz | |
debugfs: Export bool read/write functions
The file read/write functions for bools have no special dependencies
on debugfs internals and are sufficiently non-trivial to be worth
exporting so clients can re-use the implementation.
Signed-off-by: Richard Fitzgerald <rf@opensource.wolfsonmicro.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
| -rw-r--r-- | fs/debugfs/file.c | 14 | ||||
| -rw-r--r-- | include/linux/debugfs.h | 20 |
2 files changed, 28 insertions, 6 deletions
diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c index 284f9aa0028b..6c55ade071c3 100644 --- a/fs/debugfs/file.c +++ b/fs/debugfs/file.c @@ -435,8 +435,8 @@ struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode, } EXPORT_SYMBOL_GPL(debugfs_create_atomic_t); -static ssize_t read_file_bool(struct file *file, char __user *user_buf, - size_t count, loff_t *ppos) +ssize_t debugfs_read_file_bool(struct file *file, char __user *user_buf, + size_t count, loff_t *ppos) { char buf[3]; u32 *val = file->private_data; @@ -449,9 +449,10 @@ static ssize_t read_file_bool(struct file *file, char __user *user_buf, buf[2] = 0x00; return simple_read_from_buffer(user_buf, count, ppos, buf, 2); } +EXPORT_SYMBOL_GPL(debugfs_read_file_bool); -static ssize_t write_file_bool(struct file *file, const char __user *user_buf, - size_t count, loff_t *ppos) +ssize_t debugfs_write_file_bool(struct file *file, const char __user *user_buf, + size_t count, loff_t *ppos) { char buf[32]; size_t buf_size; @@ -468,10 +469,11 @@ static ssize_t write_file_bool(struct file *file, const char __user *user_buf, return count; } +EXPORT_SYMBOL_GPL(debugfs_write_file_bool); static const struct file_operations fops_bool = { - .read = read_file_bool, - .write = write_file_bool, + .read = debugfs_read_file_bool, + .write = debugfs_write_file_bool, .open = simple_open, .llseek = default_llseek, }; diff --git a/include/linux/debugfs.h b/include/linux/debugfs.h index 420311bcee38..9beb636b97eb 100644 --- a/include/linux/debugfs.h +++ b/include/linux/debugfs.h @@ -116,6 +116,12 @@ struct dentry *debugfs_create_devm_seqfile(struct device *dev, const char *name, bool debugfs_initialized(void); +ssize_t debugfs_read_file_bool(struct file *file, char __user *user_buf, + size_t count, loff_t *ppos); + +ssize_t debugfs_write_file_bool(struct file *file, const char __user *user_buf, + size_t count, loff_t *ppos); + #else #include <linux/err.h> @@ -282,6 +288,20 @@ static inline struct dentry *debugfs_create_devm_seqfile(struct device *dev, return ERR_PTR(-ENODEV); } +static inline ssize_t debugfs_read_file_bool(struct file *file, + char __user *user_buf, + size_t count, loff_t *ppos) +{ + return -ENODEV; +} + +static inline ssize_t debugfs_write_file_bool(struct file *file, + const char __user *user_buf, + size_t count, loff_t *ppos) +{ + return -ENODEV; +} + #endif #endif |