[RFC PATCH 3/4] linux/kconfig.h: remove unused helper macros

[Rasmus Villemoes]

U-Boot does not have loadable modules, and nothing currently uses any
of the (CONFIG_)?IS_(BUILTIN|MODULE) macros - only
the (CONFIG_)?IS_ENABLED variants are ever used.

While I understand the desire to keep this somewhat synchronized with
linux, we've already departed by the introduction of the
CONFIG_IS_ENABLED extra logic, and deleting these makes the next patch
much simpler, since I won't have to duplicate a lot of logic for no
real gain (as there are no users).

Signed-off-by: Rasmus Villemoes <rasmus.villemoes at prevas.dk>
---
 include/linux/kconfig.h      | 40 +++++-------------------------------
 scripts/config_whitelist.txt |  2 --
 2 files changed, 5 insertions(+), 37 deletions(-)

diff --git a/include/linux/kconfig.h b/include/linux/kconfig.h
index 56b8e5d787..caea505a0e 100644
--- a/include/linux/kconfig.h
+++ b/include/linux/kconfig.h
@@ -23,25 +23,12 @@
 #define ___config_enabled(__ignored, val, ...) val
 
 /*
- * IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y' or 'm',
+ * IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y',
  * 0 otherwise.
  *
  */
 #define IS_ENABLED(option) \
-	(config_enabled(option) || config_enabled(option##_MODULE))
-
-/*
- * IS_BUILTIN(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y', 0
- * otherwise. For boolean options, this is equivalent to
- * IS_ENABLED(CONFIG_FOO).
- */
-#define IS_BUILTIN(option) config_enabled(option)
-
-/*
- * IS_MODULE(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'm', 0
- * otherwise.
- */
-#define IS_MODULE(option) config_enabled(option##_MODULE)
+	(config_enabled(option))
 
 /*
  * U-Boot add-on: Helper macros to reference to different macros
@@ -70,29 +57,12 @@
 
 /*
  * CONFIG_IS_ENABLED(FOO) evaluates to
- *  1 if CONFIG_SPL_BUILD is undefined and CONFIG_FOO is set to 'y' or 'm',
- *  1 if CONFIG_SPL_BUILD is defined and CONFIG_SPL_FOO is set to 'y' or 'm',
- *  1 if CONFIG_TPL_BUILD is defined and CONFIG_TPL_FOO is set to 'y' or 'm',
- *  0 otherwise.
- */
-#define CONFIG_IS_ENABLED(option) \
-	(config_enabled(CONFIG_VAL(option)) ||		\
-	 config_enabled(CONFIG_VAL(option##_MODULE)))
-
-/*
- * CONFIG_IS_BUILTIN(FOO) evaluates to
  *  1 if CONFIG_SPL_BUILD is undefined and CONFIG_FOO is set to 'y',
  *  1 if CONFIG_SPL_BUILD is defined and CONFIG_SPL_FOO is set to 'y',
+ *  1 if CONFIG_TPL_BUILD is defined and CONFIG_TPL_FOO is set to 'y',
  *  0 otherwise.
  */
-#define CONFIG_IS_BUILTIN(option) config_enabled(CONFIG_VAL(option))
-
-/*
- * CONFIG_IS_MODULE(FOO) evaluates to
- *  1 if CONFIG_SPL_BUILD is undefined and CONFIG_FOO is set to 'm',
- *  1 if CONFIG_SPL_BUILD is defined and CONFIG_SPL_FOO is set to 'm',
- *  0 otherwise.
- */
-#define CONFIG_IS_MODULE(option) config_enabled(CONFIG_VAL(option##_MODULE))
+#define CONFIG_IS_ENABLED(option) \
+	(config_enabled(CONFIG_VAL(option)))
 
 #endif /* __LINUX_KCONFIG_H */
diff --git a/scripts/config_whitelist.txt b/scripts/config_whitelist.txt
index 2210f46e44..352db2b57a 100644
--- a/scripts/config_whitelist.txt
+++ b/scripts/config_whitelist.txt
@@ -875,9 +875,7 @@ CONFIG_IRAM_SIZE
 CONFIG_IRAM_STACK
 CONFIG_IRAM_TOP
 CONFIG_IRDA_BASE
-CONFIG_IS_BUILTIN
 CONFIG_IS_ENABLED
-CONFIG_IS_MODULE
 CONFIG_JFFS2_CMDLINE
 CONFIG_JFFS2_DEV
 CONFIG_JFFS2_LZO
-- 
2.23.0