From: "tip-bot2 for Valentin Schneider" <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: Valentin Schneider <valentin.schneider@arm.com>,
Qais Yousef <qais.yousef@arm.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Dietmar.Eggemann@arm.com,
Linus Torvalds <torvalds@linux-foundation.org>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>,
patrick.bellasi@matbug.net, qperret@google.com,
surenb@google.com, tj@kernel.org, Ingo Molnar <mingo@kernel.org>,
Borislav Petkov <bp@alien8.de>,
linux-kernel@vger.kernel.org
Subject: [tip: sched/core] sched/uclamp: Fix overzealous type replacement
Date: Sun, 17 Nov 2019 09:50:01 -0000 [thread overview]
Message-ID: <157398420124.12247.5677680230156384788.tip-bot2@tip-bot2> (raw)
In-Reply-To: <20191115103908.27610-1-valentin.schneider@arm.com>
The following commit has been merged into the sched/core branch of tip:
Commit-ID: 7763baace1b738d65efa46d68326c9406311c6bf
Gitweb: https://git.kernel.org/tip/7763baace1b738d65efa46d68326c9406311c6bf
Author: Valentin Schneider <valentin.schneider@arm.com>
AuthorDate: Fri, 15 Nov 2019 10:39:08
Committer: Ingo Molnar <mingo@kernel.org>
CommitterDate: Sun, 17 Nov 2019 10:46:05 +01:00
sched/uclamp: Fix overzealous type replacement
Some uclamp helpers had their return type changed from 'unsigned int' to
'enum uclamp_id' by commit
0413d7f33e60 ("sched/uclamp: Always use 'enum uclamp_id' for clamp_id values")
but it happens that some do return a value in the [0, SCHED_CAPACITY_SCALE]
range, which should really be unsigned int. The affected helpers are
uclamp_none(), uclamp_rq_max_value() and uclamp_eff_value(). Fix those up.
Note that this doesn't lead to any obj diff using a relatively recent
aarch64 compiler (8.3-2019.03). The current code of e.g. uclamp_eff_value()
properly returns an 11 bit value (bits_per(1024)) and doesn't seem to do
anything funny. I'm still marking this as fixing the above commit to be on
the safe side.
Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Reviewed-by: Qais Yousef <qais.yousef@arm.com>
Acked-by: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Dietmar.Eggemann@arm.com
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: patrick.bellasi@matbug.net
Cc: qperret@google.com
Cc: surenb@google.com
Cc: tj@kernel.org
Fixes: 0413d7f33e60 ("sched/uclamp: Always use 'enum uclamp_id' for clamp_id values")
Link: https://lkml.kernel.org/r/20191115103908.27610-1-valentin.schneider@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
kernel/sched/core.c | 6 +++---
kernel/sched/sched.h | 2 +-
2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 513a479..3ceff1c 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -810,7 +810,7 @@ static inline unsigned int uclamp_bucket_base_value(unsigned int clamp_value)
return UCLAMP_BUCKET_DELTA * uclamp_bucket_id(clamp_value);
}
-static inline enum uclamp_id uclamp_none(enum uclamp_id clamp_id)
+static inline unsigned int uclamp_none(enum uclamp_id clamp_id)
{
if (clamp_id == UCLAMP_MIN)
return 0;
@@ -853,7 +853,7 @@ static inline void uclamp_idle_reset(struct rq *rq, enum uclamp_id clamp_id,
}
static inline
-enum uclamp_id uclamp_rq_max_value(struct rq *rq, enum uclamp_id clamp_id,
+unsigned int uclamp_rq_max_value(struct rq *rq, enum uclamp_id clamp_id,
unsigned int clamp_value)
{
struct uclamp_bucket *bucket = rq->uclamp[clamp_id].bucket;
@@ -918,7 +918,7 @@ uclamp_eff_get(struct task_struct *p, enum uclamp_id clamp_id)
return uc_req;
}
-enum uclamp_id uclamp_eff_value(struct task_struct *p, enum uclamp_id clamp_id)
+unsigned int uclamp_eff_value(struct task_struct *p, enum uclamp_id clamp_id)
{
struct uclamp_se uc_eff;
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 05c2827..280a3c7 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -2300,7 +2300,7 @@ static inline void cpufreq_update_util(struct rq *rq, unsigned int flags) {}
#endif /* CONFIG_CPU_FREQ */
#ifdef CONFIG_UCLAMP_TASK
-enum uclamp_id uclamp_eff_value(struct task_struct *p, enum uclamp_id clamp_id);
+unsigned int uclamp_eff_value(struct task_struct *p, enum uclamp_id clamp_id);
static __always_inline
unsigned int uclamp_util_with(struct rq *rq, unsigned int util,
prev parent reply other threads:[~2019-11-17 9:50 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-15 10:39 [PATCH v2] sched/uclamp: Fix overzealous type replacement Valentin Schneider
2019-11-15 14:07 ` Vincent Guittot
2019-11-15 14:29 ` Valentin Schneider
2019-11-15 17:10 ` Valentin Schneider
2019-11-15 17:34 ` Vincent Guittot
2019-11-15 20:21 ` Peter Zijlstra
2019-11-15 17:38 ` Vincent Guittot
2019-11-17 9:50 ` tip-bot2 for Valentin Schneider [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=157398420124.12247.5677680230156384788.tip-bot2@tip-bot2 \
--to=tip-bot2@linutronix.de \
--cc=Dietmar.Eggemann@arm.com \
--cc=bp@alien8.de \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-tip-commits@vger.kernel.org \
--cc=mingo@kernel.org \
--cc=patrick.bellasi@matbug.net \
--cc=peterz@infradead.org \
--cc=qais.yousef@arm.com \
--cc=qperret@google.com \
--cc=surenb@google.com \
--cc=tglx@linutronix.de \
--cc=tj@kernel.org \
--cc=torvalds@linux-foundation.org \
--cc=valentin.schneider@arm.com \
--cc=vincent.guittot@linaro.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).