diff options
| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2019-10-25 11:41:24 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-03 18:08:53 +0100 |
| commit | d3504757f3f049b553ba0eda8bd17cd1f2651285 (patch) | |
| tree | 30f15df7508abc56187ead1a46305daf77ea4c3c /include | |
| parent | Documentation: debugfs: Document debugfs helper for unsigned long values (diff) | |
| download | linux-d3504757f3f049b553ba0eda8bd17cd1f2651285.tar.xz linux-d3504757f3f049b553ba0eda8bd17cd1f2651285.zip | |
debugfs: Add debugfs_create_xul() for hexadecimal unsigned long
The existing debugfs_create_ulong() function supports objects of
type "unsigned long", which are 32-bit or 64-bit depending on the
platform, in decimal form. To format objects in hexadecimal, various
debugfs_create_x*() functions exist, but all of them take fixed-size
types.
Add a debugfs helper for "unsigned long" objects in hexadecimal format.
This avoids the need for users to open-code the same, or introduce
bugs when casting the value pointer to "u32 *" or "u64 *" to call
debugfs_create_x{32,64}().
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20191025094130.26033-2-geert+renesas@glider.be
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/debugfs.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/linux/debugfs.h b/include/linux/debugfs.h index 19231e618c16..0e8f2e0cb91f 100644 --- a/include/linux/debugfs.h +++ b/include/linux/debugfs.h @@ -351,4 +351,25 @@ static inline ssize_t debugfs_write_file_bool(struct file *file, #endif +/** + * debugfs_create_xul - create a debugfs file that is used to read and write an + * unsigned long value, formatted in hexadecimal + * @name: a pointer to a string containing the name of the file to create. + * @mode: the permission that the file should have + * @parent: a pointer to the parent dentry for this file. This should be a + * directory dentry if set. If this parameter is %NULL, then the + * file will be created in the root of the debugfs filesystem. + * @value: a pointer to the variable that the file should read to and write + * from. + */ +static inline void debugfs_create_xul(const char *name, umode_t mode, + struct dentry *parent, + unsigned long *value) +{ + if (sizeof(*value) == sizeof(u32)) + debugfs_create_x32(name, mode, parent, (u32 *)value); + else + debugfs_create_x64(name, mode, parent, (u64 *)value); +} + #endif |