linux-ext4 - + jbd2-only-create-debugfs-and-stats-entries-if-cache-initialisation-is-successful.patch added to -mm tree

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Date:	Fri, 07 Mar 2008 00:57:21 -0800
From:	akpm@...ux-foundation.org
To:	mm-commits@...r.kernel.org
Cc:	duaneg@...da.com, linux-ext4@...r.kernel.org
Subject: + jbd2-only-create-debugfs-and-stats-entries-if-cache-initialisation-is-successful.patch added to -mm tree


The patch titled
     jbd2: only create debugfs and stats entries if cache initialisation is successful
has been added to the -mm tree.  Its filename is
     jbd2-only-create-debugfs-and-stats-entries-if-cache-initialisation-is-successful.patch

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*** Remember to use Documentation/SubmitChecklist when testing your code ***

See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this

The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/

------------------------------------------------------
Subject: jbd2: only create debugfs and stats entries if cache initialisation is successful
From: "Duane Griffin" <duaneg@...da.com>

jbd2 debugfs and stats entries should only be created if cache initialisation
is successful.  At the moment they are being created unconditionally which
will leave them dangling if cache (and hence module) initialisation fails.

Signed-off-by: Duane Griffin <duaneg@...da.com>
Cc: <linux-ext4@...r.kernel.org>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
---

 fs/jbd2/journal.c |    8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff -puN fs/jbd2/journal.c~jbd2-only-create-debugfs-and-stats-entries-if-cache-initialisation-is-successful fs/jbd2/journal.c
--- a/fs/jbd2/journal.c~jbd2-only-create-debugfs-and-stats-entries-if-cache-initialisation-is-successful
+++ a/fs/jbd2/journal.c
@@ -2321,10 +2321,12 @@ static int __init journal_init(void)
 	BUILD_BUG_ON(sizeof(struct journal_superblock_s) != 1024);
 
 	ret = journal_init_caches();
-	if (ret != 0)
+	if (ret == 0) {
+		jbd2_create_debugfs_entry();
+		jbd2_create_jbd_stats_proc_entry();
+	} else {
 		jbd2_journal_destroy_caches();
-	jbd2_create_debugfs_entry();
-	jbd2_create_jbd_stats_proc_entry();
+	}
 	return ret;
 }
 
_

Patches currently in -mm which might be from duaneg@...da.com are

jbd-eliminate-duplicated-code-in-revocation-table-init-destroy-functions.patch
jbd-replace-potentially-false-assertion-with-if-block.patch
jbd-only-create-debugfs-entries-if-cache-initialisation-is-successful.patch
jbd2-eliminate-duplicated-code-in-revocation-table-init-destroy-functions.patch
jbd2-replace-potentially-false-assertion-with-if-block.patch
jbd2-only-create-debugfs-and-stats-entries-if-cache-initialisation-is-successful.patch

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