summaryrefslogtreecommitdiffstats
path: root/arch/Kconfig
diff options
context:
space:
mode:
authorNicholas Piggin <npiggin@gmail.com>2016-09-14 12:24:03 +1000
committerMichal Marek <mmarek@suse.com>2016-09-22 14:37:14 +0200
commit0f4c4af06eec5717041d6fe568b80ee4cf3c1475 (patch)
tree6e6960b1b8fdda70d042f4edda0001818db0c8e3 /arch/Kconfig
parentfbe6e37dab974dd0fc3660c001895f7bfd771c9a (diff)
downloadlinux-0f4c4af06eec5717041d6fe568b80ee4cf3c1475.tar.bz2
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 <linux@roeck-us.net> Tested-by: Guenter Roeck <linux@roeck-us.net> Fixes: b67067f1176d ("kbuild: allow archs to select link dead code/data elimination") Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michal Marek <mmarek@suse.com>
Diffstat (limited to 'arch/Kconfig')
-rw-r--r--arch/Kconfig4
1 files changed, 3 insertions, 1 deletions
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