linux-ext4 - [PATCH 4/4]JBD2: sparse pointer use of zero as null

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Message-Id: <1200599303.4134.34.camel@localhost.localdomain>
Date:	Thu, 17 Jan 2008 11:48:23 -0800
From:	Mingming Cao <cmm@...ibm.com>
To:	linux-ext4@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH 4/4]JBD2: sparse pointer use of zero as null

Ported from upstream jbd changes to jbd2

sparse pointer use of zero as null

Get rid of sparse related warnings from places that use integer as NULL
pointer.

Signed-off-by: Mingming Cao <cmm@...ibm.com>
---
 fs/jbd2/transaction.c |   12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

Index: linux-2.6.24-rc7/fs/jbd2/transaction.c
===================================================================
--- linux-2.6.24-rc7.orig/fs/jbd2/transaction.c	2008-01-16 17:49:48.000000000 -0800
+++ linux-2.6.24-rc7/fs/jbd2/transaction.c	2008-01-16 18:06:33.000000000 -0800
@@ -1182,7 +1182,7 @@ int jbd2_journal_dirty_metadata(handle_t
 	}
 
 	/* That test should have eliminated the following case: */
-	J_ASSERT_JH(jh, jh->b_frozen_data == 0);
+	J_ASSERT_JH(jh, jh->b_frozen_data == NULL);
 
 	JBUFFER_TRACE(jh, "file as BJ_Metadata");
 	spin_lock(&journal->j_list_lock);
@@ -1532,7 +1532,7 @@ void __jbd2_journal_temp_unlink_buffer(s
 
 	J_ASSERT_JH(jh, jh->b_jlist < BJ_Types);
 	if (jh->b_jlist != BJ_None)
-		J_ASSERT_JH(jh, transaction != 0);
+		J_ASSERT_JH(jh, transaction != NULL);
 
 	switch (jh->b_jlist) {
 	case BJ_None:
@@ -1601,11 +1601,11 @@ __journal_try_to_free_buffer(journal_t *
 	if (buffer_locked(bh) || buffer_dirty(bh))
 		goto out;
 
-	if (jh->b_next_transaction != 0)
+	if (jh->b_next_transaction != NULL)
 		goto out;
 
 	spin_lock(&journal->j_list_lock);
-	if (jh->b_transaction != 0 && jh->b_cp_transaction == 0) {
+	if (jh->b_transaction != NULL && jh->b_cp_transaction == NULL) {
 		if (jh->b_jlist == BJ_SyncData || jh->b_jlist == BJ_Locked) {
 			/* A written-back ordered data buffer */
 			JBUFFER_TRACE(jh, "release data");
@@ -1613,7 +1613,7 @@ __journal_try_to_free_buffer(journal_t *
 			jbd2_journal_remove_journal_head(bh);
 			__brelse(bh);
 		}
-	} else if (jh->b_cp_transaction != 0 && jh->b_transaction == 0) {
+	} else if (jh->b_cp_transaction != NULL && jh->b_transaction == NULL) {
 		/* written-back checkpointed metadata buffer */
 		if (jh->b_jlist == BJ_None) {
 			JBUFFER_TRACE(jh, "remove from checkpoint list");
@@ -1973,7 +1973,7 @@ void __jbd2_journal_file_buffer(struct j
 
 	J_ASSERT_JH(jh, jh->b_jlist < BJ_Types);
 	J_ASSERT_JH(jh, jh->b_transaction == transaction ||
-				jh->b_transaction == 0);
+				jh->b_transaction == NULL);
 
 	if (jh->b_transaction && jh->b_jlist == jlist)
 		return;

 



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