lkml.org 
[lkml]   [2019]   [Jun]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] sched/core: silence a warning in sched_init()
Date
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
\
 
 \ /
  Last update: 2019-06-24 16:00    [W:0.034 / U:2.500 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site