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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2017-10-13 10:01:22 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-11-21 09:25:01 +0100 |
| commit | aa5222e92f8000ed3c1c38dddf11c83222aadfb3 (patch) | |
| tree | b775012d49350fb135d22369216c95e8aa023831 /include/linux | |
| parent | 5c0342ca7ef17220d8dd2da68d0d349c26ab19df (diff) | |
| download | linux-aa5222e92f8000ed3c1c38dddf11c83222aadfb3.tar.gz linux-aa5222e92f8000ed3c1c38dddf11c83222aadfb3.tar.bz2 linux-aa5222e92f8000ed3c1c38dddf11c83222aadfb3.zip | |
sched/deadline: Don't use dubious signed bitfields
It doesn't cause a run-time bug, but these bitfields should be unsigned.
When it's signed ->dl_throttled is set to either 0 or -1, instead of
0 and 1 as expected.
The sched.h file is included into tons of places so Sparse generates
a flood of warnings like this:
./include/linux/sched.h:477:54: error: dubious one-bit signed bitfield
Reported-by: Matthew Wilcox <willy@infradead.org>
Reported-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Luca Abeni <luca.abeni@santannapisa.it>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kernel-janitors@vger.kernel.org
Cc: luca abeni <luca.abeni@santannapisa.it>
Link: http://lkml.kernel.org/r/20171013070121.dzcncojuj2f4utij@mwanda
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/sched.h | 8 |
1 files 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 |