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@xxxxxxxxxxxxx>
AuthorDate: Tue, 12 Oct 2021 16:08:07 +02:00
Committer: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
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@xxxxxxxxxxxxx>
Reviewed-by: Nathan Chancellor <nathan@xxxxxxxxxx>
Link: https://lkml.kernel.org/r/YWWPLnaZGybHsTkv@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
---
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
|