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Sun, 25 Jan 2026 08:41:39 -0800 (PST) From: Xie Yuanbin To: linux@armlinux.org.uk, johannes@sipsolutions.net, masahiroy@kernel.org, jgross@suse.com, nsc@kernel.org, kees@kernel.org, tglx@kernel.org, mingo@kernel.org, frederic@kernel.org, paulmck@kernel.org, peterz@infradead.org, mathieu.desnoyers@efficios.com, luto@kernel.org, edumazet@google.com Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Xie Yuanbin Subject: [PATCH 6/9] ARM: entry: add tick_nohz_user_enter_prepare() if CONFIG_GENERIC_ENTRY Date: Mon, 26 Jan 2026 00:40:13 +0800 Message-ID: <20260125164016.331257-7-qq570070308@gmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260125164016.331257-1-qq570070308@gmail.com> References: <20260125164016.331257-1-qq570070308@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Starting from commit 47b8ff194c1fd73d58dc ("entry: Explicitly flush pending rcuog wakeup before last rescheduling point"), if CONFIG_GENERIC_ENTRY is enabled, tick_nohz_user_enter_prepare() should be called before returning to user. As for now, CONFIG_GENERIC_ENTRY is not available on ARM, so this commit will not change the vmlinux. Signed-off-by: Xie Yuanbin --- arch/arm/kernel/entry.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm/kernel/entry.c b/arch/arm/kernel/entry.c index 60e5c250da88..5de345e9146f 100644 --- a/arch/arm/kernel/entry.c +++ b/arch/arm/kernel/entry.c @@ -1,5 +1,6 @@ // SPDX-License-Identifier: GPL-2.0-only #include +#include #include #include #include @@ -14,6 +15,8 @@ asmlinkage __section(".entry.text") void arm_exit_to_user_mode_no_work_pending(void) { + if (IS_ENABLED(CONFIG_GENERIC_ENTRY)) + tick_nohz_user_enter_prepare(); rseq_irqentry_exit_to_user_mode(); exit_to_user_mode(); #ifdef CONFIG_KSTACK_ERASE --=20 2.51.0