diff options
| author | luca abeni <[email protected]> | 2017-09-07 12:09:31 +0200 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2017-10-10 11:45:26 +0200 |
| commit | 799ba82de01e7543f6b2042e1a739f3a20255f23 (patch) | |
| tree | b28040f9a227eb73af78a698dda7a83defdd2068 | |
| parent | 8c0944cee7af55291df0b28e6e2eeac0930e93c9 (diff) | |
sched/deadline: Use C bitfields for the state flags
Ask the compiler to use a single bit for storing true / false values,
instead of wasting the size of a whole int value.
Tested with gcc 5.4.0 on x86_64, and the compiler produces the expected
Assembly (similar to the Assembly code generated when explicitly accessing
the bits with bitmasks, "&" and "|").
Signed-off-by: luca abeni <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Reviewed-by: Daniel Bristot de Oliveira <[email protected]>
Cc: Juri Lelli <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Mathieu Poirier <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
| -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 33a01f4deb00..0f897dfc195e 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -474,10 +474,10 @@ struct sched_dl_entity { * conditions between the inactive timer handler and the wakeup * code. */ - int dl_throttled; - int dl_boosted; - int dl_yielded; - int dl_non_contending; + int dl_throttled : 1; + int dl_boosted : 1; + int dl_yielded : 1; + int dl_non_contending : 1; /* * Bandwidth enforcement timer. Each -deadline task has its |