Linux Documentation
 help / color / mirror / Atom feed
From: Karl Mehltretter <kmehltretter@gmail.com>
To: Steven Rostedt <rostedt@goodmis.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Thomas Gleixner <tglx@kernel.org>,
	Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Will Deacon <will@kernel.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Ingo Molnar <mingo@redhat.com>, Andy Lutomirski <luto@kernel.org>,
	Frederic Weisbecker <frederic@kernel.org>,
	"Paul E. McKenney" <paulmck@kernel.org>,
	Boqun Feng <boqun@kernel.org>, Waiman Long <longman@redhat.com>,
	Juri Lelli <juri.lelli@redhat.com>,
	Vincent Guittot <vincent.guittot@linaro.org>,
	Dietmar Eggemann <dietmar.eggemann@arm.com>,
	Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
	Valentin Schneider <vschneid@redhat.com>,
	K Prateek Nayak <kprateek.nayak@amd.com>,
	Hongyan Xia <hongyan.xia@transsion.com>,
	Jonathan Corbet <corbet@lwn.net>,
	Shuah Khan <skhan@linuxfoundation.org>,
	Randy Dunlap <rdunlap@infradead.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Nathan Chancellor <nathan@kernel.org>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Bill Wendling <morbo@google.com>,
	Justin Stitt <justinstitt@google.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-trace-kernel@vger.kernel.org,
	linux-rt-devel@lists.linux.dev, linux-doc@vger.kernel.org,
	llvm@lists.linux.dev, linux-kernel@vger.kernel.org,
	Linus Walleij <linusw@kernel.org>,
	Jinjie Ruan <ruanjinjie@huawei.com>
Subject: [RFC PATCH v2 02/13] arm64: percpu: Annotate __kern_my_cpu_offset() as '__always_inline'
Date: Wed, 28 Oct 2026 04:31:16 +0100	[thread overview]
Message-ID: <20261028033127.82193-3-kmehltretter@gmail.com> (raw)
In-Reply-To: <20261028033127.82193-1-kmehltretter@gmail.com>

From: Will Deacon <will@kernel.org>

Allow the use of per-cpu variables from noinstr functions by marking
__kern_my_cpu_offset() as '__always_inline'. This will later be relied
upon to detect stack overflow of the overflow stack from noinstr C code.

Signed-off-by: Will Deacon <will@kernel.org>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Reviewed-by: Jinjie Ruan <ruanjinjie@huawei.com>
Link: https://lore.kernel.org/r/20260918161407.2300-12-will@kernel.org
---
 arch/arm64/include/asm/percpu.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/percpu.h b/arch/arm64/include/asm/percpu.h
index 3cc316091d665..105f659bf8061 100644
--- a/arch/arm64/include/asm/percpu.h
+++ b/arch/arm64/include/asm/percpu.h
@@ -37,7 +37,7 @@ static inline unsigned long __hyp_my_cpu_offset(void)
 		    "mrs " dst ", tpidr_el2",				\
 		       ARM64_HAS_VIRT_HOST_EXTN)
 
-static inline unsigned long __kern_my_cpu_offset(void)
+static __always_inline unsigned long __kern_my_cpu_offset(void)
 {
 	unsigned long off;
 
-- 
2.39.5 (Apple Git-154)

  parent reply	other threads:[~2026-10-28  3:31 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-10-28  3:31 [RFC PATCH v2 00/13] entry: Classify very early hardirq entry and return-tail callbacks Karl Mehltretter
2026-10-28  3:31 ` [RFC PATCH v2 01/13] arm64: Always inline raw preempt count updates Karl Mehltretter
2026-10-28  3:31 ` Karl Mehltretter [this message]
2026-10-28  3:31 ` [RFC PATCH v2 03/13] sched: Split preempt-count bookkeeping from raw updates Karl Mehltretter
2026-10-28  3:31 ` [RFC PATCH v2 04/13] lockdep: Use raw access for pinned hardirq state Karl Mehltretter
2026-10-28  3:31 ` [RFC PATCH v2 05/13] entry: Add the pre-counted ordinary-hardirq entry/exit contract Karl Mehltretter
2026-10-28  3:31 ` [RFC PATCH v2 06/13] entry: Skip inactive IRQ-return reschedule calls Karl Mehltretter
2026-10-28  3:31 ` [RFC PATCH v2 07/13] context_tracking: Split IRQ-exit preparation from the EQS transition Karl Mehltretter
2026-10-28  3:31 ` [RFC PATCH v2 08/13] lockdep: Prepare IRQ-on state from a hardirq return tail Karl Mehltretter
2026-10-28  3:31 ` [RFC PATCH v2 09/13] entry: Carry ordinary-hardirq provenance through kernel return Karl Mehltretter
2026-10-28  3:31 ` [RFC PATCH v2 10/13] entry: Classify ordinary hardirq return-tail work as hardirq context Karl Mehltretter
2026-10-28  3:31 ` [RFC PATCH v2 11/13] arm64: Use the pre-counted hardirq lifecycle Karl Mehltretter
2026-10-28  3:31 ` [RFC PATCH v2 12/13] Documentation: entry: Describe " Karl Mehltretter
2026-10-28  3:31 ` [RFC PATCH v2 13/13] locking/selftest: Exercise hardirq return-tail preparation Karl Mehltretter

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20261028033127.82193-3-kmehltretter@gmail.com \
    --to=kmehltretter@gmail.com \
    --cc=akpm@linux-foundation.org \
    --cc=bigeasy@linutronix.de \
    --cc=boqun@kernel.org \
    --cc=bsegall@google.com \
    --cc=catalin.marinas@arm.com \
    --cc=corbet@lwn.net \
    --cc=dietmar.eggemann@arm.com \
    --cc=frederic@kernel.org \
    --cc=hongyan.xia@transsion.com \
    --cc=juri.lelli@redhat.com \
    --cc=justinstitt@google.com \
    --cc=kprateek.nayak@amd.com \
    --cc=linusw@kernel.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-doc@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-rt-devel@lists.linux.dev \
    --cc=linux-trace-kernel@vger.kernel.org \
    --cc=llvm@lists.linux.dev \
    --cc=longman@redhat.com \
    --cc=luto@kernel.org \
    --cc=mark.rutland@arm.com \
    --cc=mgorman@suse.de \
    --cc=mingo@redhat.com \
    --cc=morbo@google.com \
    --cc=nathan@kernel.org \
    --cc=ndesaulniers@google.com \
    --cc=paulmck@kernel.org \
    --cc=peterz@infradead.org \
    --cc=rdunlap@infradead.org \
    --cc=rostedt@goodmis.org \
    --cc=ruanjinjie@huawei.com \
    --cc=skhan@linuxfoundation.org \
    --cc=tglx@kernel.org \
    --cc=vincent.guittot@linaro.org \
    --cc=vschneid@redhat.com \
    --cc=will@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox