diff options
| author | Josh Poimboeuf <jpoimboe@redhat.com> | 2017-09-27 17:34:23 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-09-28 07:23:02 +0200 |
| commit | da541b20021c781f8b65492eeaee824e729599eb (patch) | |
| tree | 43aa23c21680f1f08a07edfa647521de408e811b /scripts | |
| parent | 9cd6681cb1169e815c41af0265165dd1b872f228 (diff) | |
| download | lwn-da541b20021c781f8b65492eeaee824e729599eb.tar.gz lwn-da541b20021c781f8b65492eeaee824e729599eb.zip | |
objtool: Skip unreachable warnings for GCC 4.4 and older
The kbuild bot occasionally reports warnings like:
drivers/scsi/pcmcia/aha152x_core.o: warning: objtool: seldo_run()+0x130: unreachable instruction
These warnings are always with GCC 4.4. That version of GCC sometimes
places unreachable instructions after calls to noreturn functions.
The unreachable warnings aren't very important anyway. Just ignore them
for old versions of GCC.
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/bc89b807d965b98ec18a0bb94f96a594bd58f2f2.1506551639.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/Makefile.build | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/scripts/Makefile.build b/scripts/Makefile.build index 2e3a10e79ca9..061d0c3a420a 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -265,6 +265,8 @@ objtool_args += --no-fp endif ifdef CONFIG_GCOV_KERNEL objtool_args += --no-unreachable +else +objtool_args += $(call cc-ifversion, -lt, 0405, --no-unreachable) endif # 'OBJECT_FILES_NON_STANDARD := y': skip objtool checking for a directory |