linux/debian/patches-rt/0055-md-disable-bcache.patch

From 33f359182904fdbf350968e52fa48df003cba8bc Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Thu, 29 Aug 2013 11:48:57 +0200
Subject: [PATCH 055/319] md: disable bcache
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.103-rt42.tar.xz

It uses anon semaphores
|drivers/md/bcache/request.c: In function ‘cached_dev_write_complete’:
|drivers/md/bcache/request.c:1007:2: error: implicit declaration of function ‘up_read_non_owner’ [-Werror=implicit-function-declaration]
|  up_read_non_owner(&dc->writeback_lock);
|  ^
|drivers/md/bcache/request.c: In function ‘request_write’:
|drivers/md/bcache/request.c:1033:2: error: implicit declaration of function ‘down_read_non_owner’ [-Werror=implicit-function-declaration]
|  down_read_non_owner(&dc->writeback_lock);
|  ^

either we get rid of those or we have to introduce them…

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
 drivers/md/bcache/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/md/bcache/Kconfig b/drivers/md/bcache/Kconfig
index f6e0a8b3a61e..18c03d79a442 100644
--- a/drivers/md/bcache/Kconfig
+++ b/drivers/md/bcache/Kconfig
@@ -1,6 +1,7 @@
 
 config BCACHE
 	tristate "Block device as cache"
+	depends on !PREEMPT_RT_FULL
 	select CRC64
 	help
 	Allows a block device to be used as cache for other devices; uses
-- 
2.25.0