Commit-ID: 799ba82de01e7543f6b2042e1a739f3a20255f23 Gitweb: https://git.kernel.org/tip/799ba82de01e7543f6b2042e1a739f3a20255f23 Author: luca abeni <[email protected]> AuthorDate: Thu, 7 Sep 2017 12:09:31 +0200 Committer: Ingo Molnar <[email protected]> CommitDate: Tue, 10 Oct 2017 11:45:26 +0200
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]> --- 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 33a01f4..0f897df 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
