From: Jacob Keller <jacob.e.kel...@intel.com>
Commit 799ba82de01e ("sched/deadline: Use C bitfields for the state
flags", 2017-10-10) introduced the use of C bitfields for these
variables. However, sparse complains about them:
./include/linux/sched.h:476:62: error: dubious one-bit signed bitfield
./include/linux/sched.h:477:62: error: dubious one-bit signed bitfield
./include/linux/sched.h:478:62: error: dubious one-bit signed bitfield
./include/linux/sched.h:479:62: error: dubious one-bit signed bitfield
This is because a one-bit signed bitfield can only hold the values 0 and
-1, which can cause problems if the program expects to be able to
represent the value positive 1.
In practice, this may not cause a bug since -1 would be considered
"true" in logical tests, however we should avoid the practice anyways.
Fixes: 799ba82de01e ("sched/deadline: Use C bitfields for the state flags",
2017-10-10)
Signed-off-by: Jacob Keller <jacob.e.kel...@intel.com>
Cc: luca abeni <luca.ab...@santannapisa.it>
Tested-by: Andrew Bowers <andrewx.bow...@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirs...@intel.com>
---
include/linux/sched.h | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index a5dc7c98b0a2..21991d668d35 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -473,10 +473,10 @@ struct sched_dl_entity {
* conditions between the inactive timer handler and the wakeup
* code.
*/
- int dl_throttled : 1;
- int dl_boosted : 1;
- int dl_yielded : 1;
- int dl_non_contending : 1;
+ unsigned int dl_throttled : 1;
+ unsigned int dl_boosted : 1;
+ unsigned int dl_yielded : 1;
+ unsigned int dl_non_contending : 1;
/*
* Bandwidth enforcement timer. Each -deadline task has its
--
2.15.0
