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Merge branch 'for-linus' of git://git.o-hand.com/linux-rpurdie-backlight
[powerpc.git]
/
fs
/
jbd2
/
transaction.c
diff --git
a/fs/jbd2/transaction.c
b/fs/jbd2/transaction.c
index
b6cf2be
..
7946ff4
100644
(file)
--- a/
fs/jbd2/transaction.c
+++ b/
fs/jbd2/transaction.c
@@
-1,5
+1,5
@@
/*
/*
- * linux/fs/transaction.c
+ * linux/fs/
jbd2/
transaction.c
*
* Written by Stephen C. Tweedie <sct@redhat.com>, 1998
*
*
* Written by Stephen C. Tweedie <sct@redhat.com>, 1998
*
@@
-23,10
+23,11
@@
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/timer.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/timer.h>
-#include <linux/smp_lock.h>
#include <linux/mm.h>
#include <linux/highmem.h>
#include <linux/mm.h>
#include <linux/highmem.h>
+static void __jbd2_journal_temp_unlink_buffer(struct journal_head *jh);
+
/*
* jbd2_get_transaction: obtain a new transaction_t object.
*
/*
* jbd2_get_transaction: obtain a new transaction_t object.
*
@@
-967,6
+968,13
@@
int jbd2_journal_dirty_data(handle_t *handle, struct buffer_head *bh)
*/
jbd_lock_bh_state(bh);
spin_lock(&journal->j_list_lock);
*/
jbd_lock_bh_state(bh);
spin_lock(&journal->j_list_lock);
+
+ /* Now that we have bh_state locked, are we really still mapped? */
+ if (!buffer_mapped(bh)) {
+ JBUFFER_TRACE(jh, "unmapped buffer, bailing out");
+ goto no_journal;
+ }
+
if (jh->b_transaction) {
JBUFFER_TRACE(jh, "has transaction");
if (jh->b_transaction != handle->h_transaction) {
if (jh->b_transaction) {
JBUFFER_TRACE(jh, "has transaction");
if (jh->b_transaction != handle->h_transaction) {
@@
-1028,6
+1036,11
@@
int jbd2_journal_dirty_data(handle_t *handle, struct buffer_head *bh)
sync_dirty_buffer(bh);
jbd_lock_bh_state(bh);
spin_lock(&journal->j_list_lock);
sync_dirty_buffer(bh);
jbd_lock_bh_state(bh);
spin_lock(&journal->j_list_lock);
+ /* Since we dropped the lock... */
+ if (!buffer_mapped(bh)) {
+ JBUFFER_TRACE(jh, "buffer got unmapped");
+ goto no_journal;
+ }
/* The buffer may become locked again at any
time if it is redirtied */
}
/* The buffer may become locked again at any
time if it is redirtied */
}
@@
-1824,6
+1837,7
@@
static int journal_unmap_buffer(journal_t *journal, struct buffer_head *bh)
}
}
} else if (transaction == journal->j_committing_transaction) {
}
}
} else if (transaction == journal->j_committing_transaction) {
+ JBUFFER_TRACE(jh, "on committing transaction");
if (jh->b_jlist == BJ_Locked) {
/*
* The buffer is on the committing transaction's locked
if (jh->b_jlist == BJ_Locked) {
/*
* The buffer is on the committing transaction's locked
@@
-1838,7
+1852,6
@@
static int journal_unmap_buffer(journal_t *journal, struct buffer_head *bh)
* can remove it's next_transaction pointer from the
* running transaction if that is set, but nothing
* else. */
* can remove it's next_transaction pointer from the
* running transaction if that is set, but nothing
* else. */
- JBUFFER_TRACE(jh, "on committing transaction");
set_buffer_freed(bh);
if (jh->b_next_transaction) {
J_ASSERT(jh->b_next_transaction ==
set_buffer_freed(bh);
if (jh->b_next_transaction) {
J_ASSERT(jh->b_next_transaction ==
@@
-1858,6
+1871,7
@@
static int journal_unmap_buffer(journal_t *journal, struct buffer_head *bh)
* i_size already for this truncate so recovery will not
* expose the disk blocks we are discarding here.) */
J_ASSERT_JH(jh, transaction == journal->j_running_transaction);
* i_size already for this truncate so recovery will not
* expose the disk blocks we are discarding here.) */
J_ASSERT_JH(jh, transaction == journal->j_running_transaction);
+ JBUFFER_TRACE(jh, "on running transaction");
may_free = __dispose_buffer(jh, transaction);
}
may_free = __dispose_buffer(jh, transaction);
}