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| Started by | Josh Poimboeuf <jpoimboe@redhat.com> |
|---|---|
| First post | 2017-09-28 00:40 +0200 |
| Last post | 2017-09-28 07:40 +0200 |
| Articles | 2 — 2 participants |
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[PATCH] objtool: Skip unreachable warnings for GCC 4.4 and older Josh Poimboeuf <jpoimboe@redhat.com> - 2017-09-28 00:40 +0200
[tip:core/urgent] objtool: Skip unreachable warnings for GCC 4.4 and older tip-bot for Josh Poimboeuf <tipbot@zytor.com> - 2017-09-28 07:40 +0200
| From | Josh Poimboeuf <jpoimboe@redhat.com> |
|---|---|
| Date | 2017-09-28 00:40 +0200 |
| Subject | [PATCH] objtool: Skip unreachable warnings for GCC 4.4 and older |
| Message-ID | <uut9M-AW-19@gated-at.bofh.it> |
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> --- scripts/Makefile.build | 2 ++ 1 file changed, 2 insertions(+) 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 -- 2.13.5
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| From | tip-bot for Josh Poimboeuf <tipbot@zytor.com> |
|---|---|
| Date | 2017-09-28 07:40 +0200 |
| Subject | [tip:core/urgent] objtool: Skip unreachable warnings for GCC 4.4 and older |
| Message-ID | <uuzIe-4Lq-21@gated-at.bofh.it> |
| In reply to | #1741078 |
Commit-ID: da541b20021c781f8b65492eeaee824e729599eb Gitweb: https://git.kernel.org/tip/da541b20021c781f8b65492eeaee824e729599eb Author: Josh Poimboeuf <jpoimboe@redhat.com> AuthorDate: Wed, 27 Sep 2017 17:34:23 -0500 Committer: Ingo Molnar <mingo@kernel.org> CommitDate: Thu, 28 Sep 2017 07:23:02 +0200 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> --- scripts/Makefile.build | 2 ++ 1 file changed, 2 insertions(+) diff --git a/scripts/Makefile.build b/scripts/Makefile.build index 2e3a10e7..061d0c3 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
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