compilers: Introduce options for forcing inlining on SPL/TPL

There are cases where when we allow the compiler to decide about making
inline decisions rather than forcing them it can save us space.

For now, we keep the default values for inlining that we have had
historically.

Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: NTom Rini <trini@konsulko.com>

Kconfig

@@ -65,7 +65,27 @@ config CC_OPTIMIZE_FOR_SIZE
 	  This option is enabled by default for U-Boot.
 
 config OPTIMIZE_INLINING
-	bool "Allow compiler to uninline functions marked 'inline'"
+	bool "Allow compiler to uninline functions marked 'inline' in full U-Boot"
+	default n
+	help
+	  This option determines if U-Boot forces gcc to inline the functions
+	  developers have marked 'inline'. Doing so takes away freedom from gcc to
+	  do what it thinks is best, which is desirable in some cases for size
+	  reasons.
+
+config SPL_OPTIMIZE_INLINING
+	bool "Allow compiler to uninline functions marked 'inline' in SPL"
+	depends on SPL
+	default n
+	help
+	  This option determines if U-Boot forces gcc to inline the functions
+	  developers have marked 'inline'. Doing so takes away freedom from gcc to
+	  do what it thinks is best, which is desirable in some cases for size
+	  reasons.
+
+config TPL_OPTIMIZE_INLINING
+	bool "Allow compiler to uninline functions marked 'inline' in TPL"
+	depends on TPL
 	default n
 	help
 	  This option determines if U-Boot forces gcc to inline the functions

include/linux/compiler_types.h

@@ -138,7 +138,7 @@ struct ftrace_likely_data {
  * Do not use __always_inline here, since currently it expands to inline again
  * (which would break users of __always_inline).
  */
-#if !defined(CONFIG_OPTIMIZE_INLINING)
+#if !CONFIG_IS_ENABLED(OPTIMIZE_INLINING)
 #define inline inline __attribute__((__always_inline__)) __gnu_inline \
 	__inline_maybe_unused notrace
 #else