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>
---
 include/linux/debugfs.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/linux/debugfs.h b/include/linux/debugfs.h
index 33690949b45d6904..d7b2aebcc277d65e 100644
--- a/include/linux/debugfs.h
+++ b/include/linux/debugfs.h

@@ -356,4 +356,14 @@ static inline ssize_t debugfs_write_file_bool(struct file *file,
 
 #endif
 
+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);
+}