Use FIELD_GET() and GENMASK() helpers instead of direct shifts and ANDs. This makes the code even more obvious. I didn't know about the helpers at the time of writing the macros. Suggested-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx> Signed-off-by: Jiri Slaby <jslaby@xxxxxxx> --- drivers/tty/vt/consolemap.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) diff --git a/drivers/tty/vt/consolemap.c b/drivers/tty/vt/consolemap.c index 16d0d8f04f0e..9e94ec0e0f83 100644 --- a/drivers/tty/vt/consolemap.c +++ b/drivers/tty/vt/consolemap.c @@ -23,6 +23,8 @@ * stack overflow. */ +#include <linux/bitfield.h> +#include <linux/bits.h> #include <linux/module.h> #include <linux/kd.h> #include <linux/errno.h> @@ -190,10 +192,17 @@ static enum translation_map inv_translate[MAX_NR_CONSOLES]; #define UNI_DIR_ROWS 32U #define UNI_ROW_GLYPHS 64U -#define UNI_DIR(uni) ( (uni) >> 11) -#define UNI_ROW(uni) (((uni) & GENMASK(10, 6)) >> 6) -#define UNI_GLYPH(uni) ( (uni) & GENMASK( 5, 0)) -#define UNI(dir, row, glyph) (((dir) << 11) | ((row) << 6) | (glyph)) +#define UNI_DIR_BITS GENMASK(15, 11) +#define UNI_ROW_BITS GENMASK(10, 6) +#define UNI_GLYPH_BITS GENMASK( 5, 0) + +#define UNI_DIR(uni) FIELD_GET(UNI_DIR_BITS, (uni)) +#define UNI_ROW(uni) FIELD_GET(UNI_ROW_BITS, (uni)) +#define UNI_GLYPH(uni) FIELD_GET(UNI_GLYPH_BITS, (uni)) + +#define UNI(dir, row, glyph) (FIELD_PREP(UNI_DIR_BITS, (dir)) | \ + FIELD_PREP(UNI_ROW_BITS, (row)) | \ + FIELD_PREP(UNI_GLYPH_BITS, (glyph))) /** * struct uni_pagedict -- unicode directory -- 2.36.1
