linux-kernel - [tip:core/objtool] sched: Always inline context

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Message-ID: <tip-049369487e2068294b61cee19233be0ffac7d243@git.kernel.org>
Date:	Mon, 29 Feb 2016 03:00:20 -0800
From:	tip-bot for Josh Poimboeuf <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	tglx@...utronix.de, linux-kernel@...r.kernel.org, mmarek@...e.cz,
	namhyung@...il.com, bernd@...rovitsch.priv.at,
	torvalds@...ux-foundation.org, chris.j.arges@...onical.com,
	palves@...hat.com, peterz@...radead.org, jslaby@...e.cz,
	mingo@...nel.org, akpm@...ux-foundation.org, luto@...nel.org,
	hpa@...or.com, bp@...en8.de, acme@...nel.org, jpoimboe@...hat.com
Subject: [tip:core/objtool] sched: Always inline context_switch()

Commit-ID:  049369487e2068294b61cee19233be0ffac7d243
Gitweb:     http://git.kernel.org/tip/049369487e2068294b61cee19233be0ffac7d243
Author:     Josh Poimboeuf <jpoimboe@...hat.com>
AuthorDate: Sun, 28 Feb 2016 22:22:39 -0600
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Mon, 29 Feb 2016 08:35:11 +0100

sched: Always inline context_switch()

When CONFIG_GCOV is enabled, gcc decides to put context_switch()
out-of-line, which is inconsistent with its normal behavior.

It also causes an objtool warning because __schedule() no longer inlines
context_switch(), so the "STACK_FRAME_NON_STANDARD(__schedule)"
statement loses its effect.

Signed-off-by: Josh Poimboeuf <jpoimboe@...hat.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Bernd Petrovitsch <bernd@...rovitsch.priv.at>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Chris J Arges <chris.j.arges@...onical.com>
Cc: Jiri Slaby <jslaby@...e.cz>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Michal Marek <mmarek@...e.cz>
Cc: Namhyung Kim <namhyung@...il.com>
Cc: Pedro Alves <palves@...hat.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: live-patching@...r.kernel.org
Link: http://lkml.kernel.org/r/d62aee926b6e303394e34a06999a964dc2773cf6.1456719558.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 kernel/sched/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 641043d..bb0daab 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -2763,7 +2763,7 @@ asmlinkage __visible void schedule_tail(struct task_struct *prev)
 /*
  * context_switch - switch to the new MM and the new thread's register state.
  */
-static inline struct rq *
+static __always_inline struct rq *
 context_switch(struct rq *rq, struct task_struct *prev,
 	       struct task_struct *next)
 {