linux-kernel - [PATCH 6/7] iio: buffer: document store_to() callback may be called in any context

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Message-Id: <20250912-iio-doc-push-to-buffers-context-v1-6-c4aad013d96e@baylibre.com>
Date: Fri, 12 Sep 2025 11:05:57 -0500
From: David Lechner <dlechner@...libre.com>
To: Jonathan Cameron <jic23@...nel.org>, 
 Nuno Sá <nuno.sa@...log.com>, 
 Andy Shevchenko <andy@...nel.org>
Cc: linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Daniel Lezcano <daniel.lezcano@...aro.org>, 
 David Lechner <dlechner@...libre.com>
Subject: [PATCH 6/7] iio: buffer: document store_to() callback may be
 called in any context

Document that the struct iio_buffer_access_funcs.store_to() callback
must be safe to call from any context since it is called from
iio_push_to_buffer() which may be called from any context.

Signed-off-by: David Lechner <dlechner@...libre.com>
---
 include/linux/iio/buffer_impl.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux/iio/buffer_impl.h b/include/linux/iio/buffer_impl.h
index e72552e026f3a3c15fca04d26aaa91dbd27e17bc..0daff9ff20ce49de67fa0f2ac6191882de2f4a67 100644
--- a/include/linux/iio/buffer_impl.h
+++ b/include/linux/iio/buffer_impl.h
@@ -24,7 +24,8 @@ struct sg_table;
 
 /**
  * struct iio_buffer_access_funcs - access functions for buffers.
- * @store_to:		actually store stuff to the buffer
+ * @store_to:		actually store stuff to the buffer - must be safe to
+ *			call from any context (e.g. must not sleep).
  * @read:		try to get a specified number of bytes (must exist)
  * @data_available:	indicates how much data is available for reading from
  *			the buffer.

-- 
2.43.0