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    Subject[tip: sched/core] sched/core: Update task_prio() function header
    The following commit has been merged into the sched/core branch of tip:

    Commit-ID: c541bb7835a306cdbbe8abbdf4e4df507e0ca27a
    Gitweb: https://git.kernel.org/tip/c541bb7835a306cdbbe8abbdf4e4df507e0ca27a
    Author: Dietmar Eggemann <dietmar.eggemann@arm.com>
    AuthorDate: Thu, 28 Jan 2021 14:10:40 +01:00
    Committer: Ingo Molnar <mingo@kernel.org>
    CommitterDate: Wed, 17 Feb 2021 14:08:30 +01:00

    sched/core: Update task_prio() function header

    The description of the RT offset and the values for 'normal' tasks needs
    update. Moreover there are DL tasks now.
    task_prio() has to stay like it is to guarantee compatibility with the
    /proc/<pid>/stat priority field:

    # cat /proc/<pid>/stat | awk '{ print $18; }'

    Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
    Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
    Signed-off-by: Ingo Molnar <mingo@kernel.org>
    Link: https://lkml.kernel.org/r/20210128131040.296856-4-dietmar.eggemann@arm.com
    ---
    kernel/sched/core.c | 8 ++++++--
    1 file changed, 6 insertions(+), 2 deletions(-)

    diff --git a/kernel/sched/core.c b/kernel/sched/core.c
    index f0b0b67..4afbdd2 100644
    --- a/kernel/sched/core.c
    +++ b/kernel/sched/core.c
    @@ -5616,8 +5616,12 @@ SYSCALL_DEFINE1(nice, int, increment)
    * @p: the task in question.
    *
    * Return: The priority value as seen by users in /proc.
    - * RT tasks are offset by -200. Normal tasks are centered
    - * around 0, value goes from -16 to +15.
    + *
    + * sched policy return value kernel prio user prio/nice
    + *
    + * normal, batch, idle [0 ... 39] [100 ... 139] 0/[-20 ... 19]
    + * fifo, rr [-2 ... -100] [98 ... 0] [1 ... 99]
    + * deadline -101 -1 0
    */
    int task_prio(const struct task_struct *p)
    {
    \
     
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