From 1f1a0f3db338cdcaad4f83153d1163aa18e08ed5 Mon Sep 17 00:00:00 2001 From: Tom Rini Date: Thu, 14 May 2020 08:30:07 -0400 Subject: compiler_types.h: Re-introduce CONFIG_OPTIMIZE_INLINING for U-Boot In the Linux kernel, support for forcing inline functions to be made inline, rather than allowing the compiler to make its own choice has been removed. With respect to performance, modern GCC (and Clang) do a good job at deciding when to, or not to, inline code and there are no run-time requirements in Linux anymore. There is one downside to this, which is final binary size. On average in U-Boot removing this support grows SPL by almost 1 kilobyte. But there are cases where it shrinks the binary by making better inline choices than we had forced. Start by re-introducing CONFIG_OPTIMIZE_INLINING as a global which essentially reverts 889b3c1245de ("compiler: remove CONFIG_OPTIMIZE_INLINING entirely") from Linux. Cc: Masahiro Yamada Signed-off-by: Tom Rini --- Kconfig | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'Kconfig') diff --git a/Kconfig b/Kconfig index 83a3a7e..d5930c3 100644 --- a/Kconfig +++ b/Kconfig @@ -64,6 +64,15 @@ 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'" + 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 CC_COVERAGE bool "Enable code coverage analysis" depends on SANDBOX -- cgit v1.1