From: Wolfram Sang <wsa+renesas@sang-engineering.com>
To: Matthew Wilcox <willy@infradead.org>
Cc: linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Bjorn Andersson <andersson@kernel.org>,
linux-remoteproc@vger.kernel.org,
Baolin Wang <baolin.wang@linux.alibaba.com>
Subject: Re: [PATCH v2 0/4] hwspinlock: add summary in debugfs
Date: Mon, 29 Jun 2026 12:03:34 +0200 [thread overview]
Message-ID: <akJC9pD2b5GQbB0u@ninjato> (raw)
In-Reply-To: <ajk_u7TVT-kL8z2A@casper.infradead.org>
> The hwspinlock_tree_lock is not needed as the
> spinlock built into the XArray is sufficient for all these cases.
Are you sure about this?
In hwspin_lock_request_specific(), the spinlock is taken, then:
hwspin_lock_request_specific()
-> __hwspin_lock_request()
-> pm_runtime_get_sync()
-> __pm_runtime_resume()
This starts with:
might_sleep_if(!(rpmflags & RPM_ASYNC) && !dev->power.irq_safe &&
dev->power.runtime_status != RPM_ACTIVE);
Isn't this a problem?
prev parent reply other threads:[~2026-06-29 10:03 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-22 8:51 [PATCH v2 0/4] hwspinlock: add summary in debugfs Wolfram Sang
2026-06-22 8:52 ` [PATCH v2 1/4] radix-tree: add parameter doc for radix_tree_deref_slot_protected() Wolfram Sang
2026-06-22 10:16 ` Andy Shevchenko
2026-06-22 8:52 ` [PATCH v2 2/4] radix-tree: allow more lock types with radix_tree_deref_slot_protected() Wolfram Sang
2026-06-22 10:18 ` Andy Shevchenko
2026-06-22 8:52 ` [PATCH v2 3/4] hwspinlock: annotate slot pointer as RCU sensitive Wolfram Sang
2026-06-22 10:20 ` Andy Shevchenko
2026-06-29 9:07 ` Wolfram Sang
2026-06-22 8:52 ` [PATCH v2 4/4] hwspinlock: add summary in debugfs Wolfram Sang
2026-06-22 10:24 ` Andy Shevchenko
2026-06-22 13:59 ` [PATCH v2 0/4] " Matthew Wilcox
2026-06-22 16:20 ` Wolfram Sang
2026-06-29 8:57 ` Wolfram Sang
2026-06-29 10:40 ` Andy Shevchenko
2026-06-29 10:55 ` Wolfram Sang
2026-06-29 18:54 ` Matthew Wilcox
2026-07-01 15:07 ` Wolfram Sang
2026-06-29 10:03 ` Wolfram Sang [this message]
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