From: Guixin Liu <kanie@linux.alibaba.com>
To: Davidlohr Bueso <dave@stgolabs.net>,
Jonathan Cameron <jic23@kernel.org>,
Dave Jiang <dave.jiang@intel.com>,
Alison Schofield <alison.schofield@intel.com>,
Vishal Verma <vishal.l.verma@intel.com>,
Dan Williams <djbw@kernel.org>, Ira Weiny <iweiny@kernel.org>,
Li Ming <ming.li@zohomail.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"Rafael J . Wysocki" <rafael@kernel.org>,
Danilo Krummrich <dakr@kernel.org>,
Shaikh Kamaluddin <shaikhkamal2012@gmail.com>
Cc: linux-cxl@vger.kernel.org, driver-core@lists.linux.dev
Subject: [PATCH v3 1/2] driver core: Add conditional guard support for device_trylock()
Date: Thu, 10 Sep 2026 17:40:16 +0800 [thread overview]
Message-ID: <20260910094017.4032170-2-kanie@linux.alibaba.com> (raw)
In-Reply-To: <20260910094017.4032170-1-kanie@linux.alibaba.com>
Introduce a conditional guard version of device_trylock() for scenarios
that must not block on the device lock. device_trylock() returns 1 on
success like mutex_trylock(), so the default binary condition applies and
ACQUIRE_ERR() reports -EBUSY on contention.
Suggested-by: Shaikh Kamaluddin <shaikhkamal2012@gmail.com>
Signed-off-by: Guixin Liu <kanie@linux.alibaba.com>
---
include/linux/device.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/linux/device.h b/include/linux/device.h
index aee79fd6b32b..a8d6cf76d137 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -1121,6 +1121,7 @@ static inline void device_unlock(struct device *dev)
DEFINE_GUARD(device, struct device *, device_lock(_T), device_unlock(_T))
DEFINE_GUARD_COND(device, _intr, device_lock_interruptible(_T), _RET == 0)
+DEFINE_GUARD_COND(device, _try, device_trylock(_T))
static inline void device_lock_assert(struct device *dev)
{
--
2.43.7
next prev parent reply other threads:[~2026-09-10 9:40 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-10 9:40 [PATCH v3 0/2] cxl/memdev: Fix poison debugfs vs unbind deadlock Guixin Liu
2026-09-10 9:40 ` Guixin Liu [this message]
2026-09-10 20:55 ` [PATCH v3 1/2] driver core: Add conditional guard support for device_trylock() Jonathan Cameron
2026-09-10 9:40 ` [PATCH v3 2/2] cxl/memdev: Fix deadlock between poison debugfs and cxl_mem unbind Guixin Liu
2026-09-10 9:52 ` Greg Kroah-Hartman
2026-09-10 11:28 ` Guixin Liu
2026-09-10 11:58 ` Greg Kroah-Hartman
2026-09-10 20:52 ` Jonathan Cameron
2026-09-10 21:03 ` Jonathan Cameron
2026-09-11 3:04 ` Guixin Liu
2026-09-11 23:09 ` Jonathan Cameron
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=20260910094017.4032170-2-kanie@linux.alibaba.com \
--to=kanie@linux.alibaba.com \
--cc=alison.schofield@intel.com \
--cc=dakr@kernel.org \
--cc=dave.jiang@intel.com \
--cc=dave@stgolabs.net \
--cc=djbw@kernel.org \
--cc=driver-core@lists.linux.dev \
--cc=gregkh@linuxfoundation.org \
--cc=iweiny@kernel.org \
--cc=jic23@kernel.org \
--cc=linux-cxl@vger.kernel.org \
--cc=ming.li@zohomail.com \
--cc=rafael@kernel.org \
--cc=shaikhkamal2012@gmail.com \
--cc=vishal.l.verma@intel.com \
/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