linux-kernel - [tip: core/urgent] entry: Always inline local_irq_{enable,disable}_exit_to

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <176605113985.510.268525550797363050.tip-bot2@tip-bot2>
Date: Thu, 18 Dec 2025 09:45:39 -0000
From: "tip-bot2 for Eric Dumazet" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Eric Dumazet <edumazet@...gle.com>,
 "Peter Zijlstra (Intel)" <peterz@...radead.org>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: core/urgent] entry: Always inline
 local_irq_{enable,disable}_exit_to_user()

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

Commit-ID:     4a824c3128998158a093eaadd776a79abe3a601a
Gitweb:        https://git.kernel.org/tip/4a824c3128998158a093eaadd776a79abe3a601a
Author:        Eric Dumazet <edumazet@...gle.com>
AuthorDate:    Thu, 04 Dec 2025 15:31:27 
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Thu, 18 Dec 2025 10:43:52 +01:00

entry: Always inline local_irq_{enable,disable}_exit_to_user()

clang needs __always_inline instead of inline, even for tiny helpers.

This saves some cycles in system call fast path, and saves 195 bytes
on x86_64 build:

$ size vmlinux.before vmlinux.after
   text	   data	    bss	    dec	    hex	filename
34652814	22291961	5875180	62819955	3be8e73	vmlinux.before
34652619	22291961	5875180	62819760	3be8db0	vmlinux.after

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Link: https://patch.msgid.link/20251204153127.1321824-1-edumazet@google.com
---
 include/linux/irq-entry-common.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/irq-entry-common.h b/include/linux/irq-entry-common.h
index 6ab913e..d26d1b1 100644
--- a/include/linux/irq-entry-common.h
+++ b/include/linux/irq-entry-common.h
@@ -110,7 +110,7 @@ static __always_inline void enter_from_user_mode(struct pt_regs *regs)
 static inline void local_irq_enable_exit_to_user(unsigned long ti_work);
 
 #ifndef local_irq_enable_exit_to_user
-static inline void local_irq_enable_exit_to_user(unsigned long ti_work)
+static __always_inline void local_irq_enable_exit_to_user(unsigned long ti_work)
 {
 	local_irq_enable();
 }
@@ -125,7 +125,7 @@ static inline void local_irq_enable_exit_to_user(unsigned long ti_work)
 static inline void local_irq_disable_exit_to_user(void);
 
 #ifndef local_irq_disable_exit_to_user
-static inline void local_irq_disable_exit_to_user(void)
+static __always_inline void local_irq_disable_exit_to_user(void)
 {
 	local_irq_disable();
 }