From 0f4c4af06eec5717041d6fe568b80ee4cf3c1475 Mon Sep 17 00:00:00 2001 From: Nicholas Piggin Date: Wed, 14 Sep 2016 12:24:03 +1000 Subject: kbuild: -ffunction-sections fix for archs with conflicting sections Enabling -ffunction-sections modified the generic linker script to pull .text.* sections into regular TEXT_TEXT section, conflicting with some architectures. Revert that change and require archs that enable the option to ensure they have no conflicting section names, and do the appropriate merging. Reported-by: Guenter Roeck Tested-by: Guenter Roeck Fixes: b67067f1176d ("kbuild: allow archs to select link dead code/data elimination") Signed-off-by: Nicholas Piggin Signed-off-by: Michal Marek --- arch/Kconfig | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'arch/Kconfig') diff --git a/arch/Kconfig b/arch/Kconfig index 3f948c422d9d..48d1e76a1ee3 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -478,7 +478,9 @@ config LD_DEAD_CODE_DATA_ELIMINATION This requires that the arch annotates or otherwise protects its external entry points from being discarded. Linker scripts must also merge .text.*, .data.*, and .bss.* correctly into - output sections. + output sections. Care must be taken not to pull in unrelated + sections (e.g., '.text.init'). Typically '.' in section names + is used to distinguish them from label names / C identifiers. config HAVE_CONTEXT_TRACKING bool -- cgit