linux-kernel - [PATCH 1/2] pstore: check PSTORE_FLAGS_FRAGILE in pstore

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Message-Id: <ab909fa2d2e97904b4cf34df79998548a153dd9c.1445611895.git.geliangtang@163.com>
Date:	Fri, 23 Oct 2015 22:56:22 +0800
From:	Geliang Tang <geliangtang@....com>
To:	Anton Vorontsov <anton@...msg.org>,
	Colin Cross <ccross@...roid.com>,
	Kees Cook <keescook@...omium.org>,
	Tony Luck <tony.luck@...el.com>
Cc:	Geliang Tang <geliangtang@....com>, linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] pstore: check PSTORE_FLAGS_FRAGILE in pstore_unregister

When PSTORE_FLAGS_FRAGILE flag is set, only kmsg is registered in
pstore_register. So, under these circumstances, only kmsg needs to
be unregistered in pstore_unregister.

Signed-off-by: Geliang Tang <geliangtang@....com>
---
 fs/pstore/platform.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index 0aab920..7ad2038 100644
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -496,9 +496,12 @@ EXPORT_SYMBOL_GPL(pstore_register);
 
 void pstore_unregister(struct pstore_info *psi)
 {
-	pstore_unregister_pmsg();
-	pstore_unregister_ftrace();
-	pstore_unregister_console();
+	if ((psi->flags & PSTORE_FLAGS_FRAGILE) == 0) {
+		pstore_unregister_pmsg();
+		pstore_unregister_ftrace();
+		pstore_unregister_console();
+	}
+
 	pstore_unregister_kmsg();
 
 	free_buf_for_compression();
-- 
2.5.0


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