[PATCH] staging: fbtft: replace empty macro args with identity converter

Baker
2026-04-12T17:22:03Z

The define_fbtft_write_reg macro calls 'modifier' as a function.
Passing an empty token as modifier is undefined behavior in C for
fixed-arity macros. Introduce fbtft_no_conv() as an identity
function to replace the empty args in the no-conversion cases.

Signed-off-by: Baker <mzndmzn@gmail.com>
---
drivers/staging/fbtft/fbtft-bus.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/fbtft/fbtft-bus.c b/drivers/staging/fbtft/fbtft-bus.c
index 30e436ff19e4..8ce263f68ed2 100644
--- a/drivers/staging/fbtft/fbtft-bus.c
+++ b/drivers/staging/fbtft/fbtft-bus.c
@@ -11,6 +11,8 @@
*
*****************************************************************************/

+#define fbtft_no_conv(x) (x)
+
#define define_fbtft_write_reg(func, buffer_type, data_type, modifier) \
void func(struct fbtft_par *par, int len, ...) \
{ \
@@ -62,9 +64,9 @@ out: \