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hc
2024-09-20 a36159eec6ca17402b0e146b86efaf76568dc353 
 kernel/drivers/md/bcache/Kconfig
....@@ -1,3 +1,4 @@
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+# SPDX-License-Identifier: GPL-2.0-only
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23 config BCACHE
34 	tristate "Block device as cache"
....@@ -25,3 +26,12 @@
2526 	Keeps all active closures in a linked list and provides a debugfs
2627 	interface to list them, which makes it possible to see asynchronous
2728 	operations that get stuck.
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+
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+config BCACHE_ASYNC_REGISTRATION
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+	bool "Asynchronous device registration (EXPERIMENTAL)"
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+	depends on BCACHE
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+	help
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+	Add a sysfs file /sys/fs/bcache/register_async. Writing registering
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+	device path into this file will returns immediately and the real
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+	registration work is handled in kernel work queue in asynchronous
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+	way.