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From: Christoph Hellwig <hch@lst.de>
To: Kees Cook <keescook@chromium.org>,
	Anton Vorontsov <anton@enomsg.org>,
	Colin Cross <ccross@android.com>, Tony Luck <tony.luck@intel.com>,
	WeiXiong Liao <liaoweixiong@allwinnertech.com>
Cc: linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH 9/9] pstore/blk: don't depend on CONFIG_BLOCK
Date: Fri, 16 Oct 2020 15:20:47 +0200
Message-ID: <20201016132047.3068029-10-hch@lst.de> (raw)
In-Reply-To: <20201016132047.3068029-1-hch@lst.de>

pstore-blk contains of two different layers:

 a) a tiny layer of sugar coating ontop of pstore-zone.  This part has
    no dependencies on the block layer, and can be used e.g. by mtd
 b) an implementation of a default fallback pstore zone backend for
    block devices

Add an ifdef for the latter so that pstore-blk itself does not have to
depend on CONFIG_BLOCK.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/pstore/Kconfig | 2 +-
 fs/pstore/blk.c   | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/pstore/Kconfig b/fs/pstore/Kconfig
index e16a49ebfe546d..6eadb538316e52 100644
--- a/fs/pstore/Kconfig
+++ b/fs/pstore/Kconfig
@@ -164,7 +164,7 @@ config PSTORE_ZONE
 config PSTORE_BLK
 	tristate "Log panic/oops to a block device"
 	depends on PSTORE
-	depends on BLOCK
+	depends on BLOCK || !BLOCK
 	select PSTORE_ZONE
 	default n
 	help
diff --git a/fs/pstore/blk.c b/fs/pstore/blk.c
index bd4eadfc9bd795..d3d25edb943cdd 100644
--- a/fs/pstore/blk.c
+++ b/fs/pstore/blk.c
@@ -182,6 +182,7 @@ void unregister_pstore_device(const struct pstore_zone_ops *ops)
 }
 EXPORT_SYMBOL_GPL(unregister_pstore_device);
 
+#ifdef CONFIG_BLOCK
 static struct file *psblk_file;
 
 static ssize_t psblk_generic_blk_read(char *buf, size_t bytes, loff_t pos)
@@ -269,6 +270,7 @@ void __init pstore_blk_early_init(void)
 	__pstore_blk_init(devname);
 }
 #endif /* MODULE */
+#endif /* CONFIG_BLOCK */
 
 /* get information of pstore/blk */
 int pstore_blk_get_config(struct pstore_blk_config *info)
-- 
2.28.0


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Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-16 13:20 simplify pstore-blk Christoph Hellwig
2020-10-16 13:20 ` [PATCH 1/9] pstore/zone: cap the maximum device size Christoph Hellwig
2020-11-08 14:05   ` 廖威雄
2020-10-16 13:20 ` [PATCH 2/9] pstore/blk: update the command line example Christoph Hellwig
2020-11-08 14:05   ` 廖威雄
2020-10-16 13:20 ` [PATCH 3/9] pstore/blk: remove {un,}register_pstore_blk Christoph Hellwig
2020-10-16 13:20 ` [PATCH 4/9] pstore/blk: remove __unregister_pstore_blk Christoph Hellwig
2020-10-16 13:20 ` [PATCH 5/9] pstore/blk: simplify the block device open / close path Christoph Hellwig
2020-10-16 13:20 ` [PATCH 6/9] pstore/zone: split struct pstore_zone_info Christoph Hellwig
2020-10-16 13:20 ` [PATCH 7/9] pstore/blk: remove struct pstore_device_info Christoph Hellwig
2020-10-16 13:20 ` [PATCH 8/9] pstore/blk: use the normal block device I/O path Christoph Hellwig
2020-11-08 14:43   ` 廖威雄
2020-11-23 14:49     ` Christoph Hellwig
2020-10-16 13:20 ` Christoph Hellwig [this message]
2020-10-16 22:54 ` simplify pstore-blk Kees Cook
2020-11-23 14:53   ` Christoph Hellwig
2020-11-24 22:53     ` Kees Cook
2020-11-08 14:34 ` 廖威雄

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