Messages in this thread Patch in this message | | | From | Qian Cai <> | Subject | [PATCH] sched/core: silence a warning in sched_init() | Date | Mon, 24 Jun 2019 09:59:41 -0400 |
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Compiling a kernel with both FAIR_GROUP_SCHED=n and RT_GROUP_SCHED=n will generate a warning using W=1,
kernel/sched/core.c: In function 'sched_init': kernel/sched/core.c:5906:32: warning: variable 'ptr' set but not used [-Wunused-but-set-variable] unsigned long alloc_size = 0, ptr; ^~~
It apparently the maintainers don't like the proper fix [1] which contains ugly idefs, so silence it by appending the __maybe_unused attribute for it instead.
[1] https://lore.kernel.org/lkml/1559681162-5385-1-git-send-email-cai@lca.pw/
Signed-off-by: Qian Cai <cai@lca.pw> --- kernel/sched/core.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 874c427742a9..9bbad91b3f01 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -5903,7 +5903,10 @@ int in_sched_functions(unsigned long addr) void __init sched_init(void) { int i, j; - unsigned long alloc_size = 0, ptr; + unsigned long alloc_size = 0; + + /* To silence a -Wunused-but-set-variable warning. */ + unsigned long ptr __maybe_unused; wait_bit_init(); -- 1.8.3.1
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