Commit 8a9362eb authored by Duane Griffin's avatar Duane Griffin Committed by Theodore Ts'o

jbd2: replace potentially false assertion with if block

If an error occurs during jbd2 cache initialisation it is possible for the
journal_head_cache to be NULL when jbd2_journal_destroy_journal_head_cache is
called.  Replace the J_ASSERT with an if block to handle the situation
correctly.

Note that even with this fix things will break badly if jbd2 is statically
compiled in and cache initialisation fails.
Signed-off-by: default avatarDuane Griffin <duaneg@dghda.com>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarMingming Cao <cmm@us.ibm.com>
Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
parent 83c49523
......@@ -1976,9 +1976,10 @@ static int journal_init_jbd2_journal_head_cache(void)
static void jbd2_journal_destroy_jbd2_journal_head_cache(void)
{
J_ASSERT(jbd2_journal_head_cache != NULL);
kmem_cache_destroy(jbd2_journal_head_cache);
jbd2_journal_head_cache = NULL;
if (jbd2_journal_head_cache) {
kmem_cache_destroy(jbd2_journal_head_cache);
jbd2_journal_head_cache = NULL;
}
}
/*
......
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