Messages in this thread Patch in this message | | | Date | Fri, 15 Oct 2021 09:45:00 -0000 | From | "tip-bot2 for Peter Zijlstra" <> | Subject | [tip: sched/core] sched: Disable -Wunused-but-set-variable |
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The following commit has been merged into the sched/core branch of tip:
Commit-ID: 37b47298ab864fb3f5488ddebfc35267ceab0553 Gitweb: https://git.kernel.org/tip/37b47298ab864fb3f5488ddebfc35267ceab0553 Author: Peter Zijlstra <peterz@infradead.org> AuthorDate: Tue, 12 Oct 2021 16:08:07 +02:00 Committer: Peter Zijlstra <peterz@infradead.org> CommitterDate: Fri, 15 Oct 2021 11:25:15 +02:00
sched: Disable -Wunused-but-set-variable
The compilers can't deal with obvious DCE vs that warning, resulting in code like:
if (0) { sched sched_statistics *stats;
stats = __schedstats_from_se(se);
... }
triggering the warning. Kill the warning to make the robots stop reporting this.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Nathan Chancellor <nathan@kernel.org> Link: https://lkml.kernel.org/r/YWWPLnaZGybHsTkv@hirez.programming.kicks-ass.net --- kernel/sched/Makefile | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/kernel/sched/Makefile b/kernel/sched/Makefile index 978fcfc..c7421f2 100644 --- a/kernel/sched/Makefile +++ b/kernel/sched/Makefile @@ -3,6 +3,10 @@ ifdef CONFIG_FUNCTION_TRACER CFLAGS_REMOVE_clock.o = $(CC_FLAGS_FTRACE) endif +# The compilers are complaining about unused variables inside an if(0) scope +# block. This is daft, shut them up. +ccflags-y += $(call cc-disable-warning, unused-but-set-variable) + # These files are disabled because they produce non-interesting flaky coverage # that is not a function of syscall inputs. E.g. involuntary context switches. KCOV_INSTRUMENT := n
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