linux-kernel - [tip: objtool/urgent] rcu-tasks: Always inline rcu_irq_work

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Message-ID: <174349168923.14745.14986706790553425929.tip-bot2@tip-bot2>
Date: Tue, 01 Apr 2025 07:14:48 -0000
From: "tip-bot2 for Josh Poimboeuf" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Randy Dunlap <rdunlap@...radead.org>, Josh Poimboeuf <jpoimboe@...nel.org>,
 Ingo Molnar <mingo@...nel.org>,
 Linus Torvalds <torvalds@...ux-foundation.org>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: objtool/urgent] rcu-tasks: Always inline rcu_irq_work_resched()

The following commit has been merged into the objtool/urgent branch of tip:

Commit-ID:     f117dc45092f45e4620de4b928ce02591077ab66
Gitweb:        https://git.kernel.org/tip/f117dc45092f45e4620de4b928ce02591077ab66
Author:        Josh Poimboeuf <jpoimboe@...nel.org>
AuthorDate:    Mon, 31 Mar 2025 21:26:46 -07:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Tue, 01 Apr 2025 09:07:14 +02:00

rcu-tasks: Always inline rcu_irq_work_resched()

Thanks to CONFIG_DEBUG_SECTION_MISMATCH, empty functions can be
generated out of line.  rcu_irq_work_resched() can be called from
noinstr code, so make sure it's always inlined.

Fixes: 564506495ca9 ("rcu/context-tracking: Move deferred nocb resched to context tracking")
Reported-by: Randy Dunlap <rdunlap@...radead.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@...nel.org>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Link: https://lore.kernel.org/r/e84f15f013c07e4c410d972e75620c53b62c1b3e.1743481539.git.jpoimboe@kernel.org
Closes: https://lore.kernel.org/d1eca076-fdde-484a-b33e-70e0d167c36d@infradead.org
---
 include/linux/rcupdate.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index f8159f8..120536f 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -132,7 +132,7 @@ static inline void rcu_sysrq_end(void) { }
 #if defined(CONFIG_NO_HZ_FULL) && (!defined(CONFIG_GENERIC_ENTRY) || !defined(CONFIG_KVM_XFER_TO_GUEST_WORK))
 void rcu_irq_work_resched(void);
 #else
-static inline void rcu_irq_work_resched(void) { }
+static __always_inline void rcu_irq_work_resched(void) { }
 #endif
 
 #ifdef CONFIG_RCU_NOCB_CPU