linux-kernel - [RFC PATCH 5/9] sched: export-GPL task

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Date:   Thu,  9 Apr 2020 15:35:39 -0400
From:   Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Will Deacon <will@...nel.org>, akpm@...ux-foundation.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "K . Prasad" <prasad@...ux.vnet.ibm.com>,
        Masami Hiramatsu <mhiramat@...nel.org>, rostedt@...dmis.org,
        Alexei Starovoitov <ast@...nel.org>
Cc:     linux-kernel@...r.kernel.org,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>
Subject: [RFC PATCH 5/9] sched: export-GPL task_prio

Exporting the task_prio() symbol to GPL modules is useful for kernel
tracers implemented as kernel modules. It exports information which is
already available through /proc in a way which allows it to be sampled
by kernel tracers with low overhead.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
---
 kernel/sched/core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index a2694ba82874..f87cffef317a 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4629,6 +4629,7 @@ int task_prio(const struct task_struct *p)
 {
 	return p->prio - MAX_RT_PRIO;
 }
+EXPORT_SYMBOL_GPL(task_prio);
 
 /**
  * idle_cpu - is a given CPU idle currently?
-- 
2.17.1