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From: "Josef 'Jeff' Sipek" <jsipek@cs.sunysb.edu>
To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org
Cc: akpm@linux-foundation.org, "Josef 'Jeff' Sipek" <jsipek@cs.sunysb.edu>
Subject: [PATCH 16/16] Unionfs: Remove superfluous check for NULL pointer
Date: Sun, 17 Jun 2007 15:09:23 -0400	[thread overview]
Message-ID: <11821073652554-git-send-email-jsipek@cs.sunysb.edu> (raw)
In-Reply-To: <11821073632989-git-send-email-jsipek@cs.sunysb.edu>

Since we use containers and the struct inode is _inside_ the
unionfs_inode_info structure, UNIONFS_I will always (given a non-NULL inode
pointer), return a valid non-NULL pointer.

Signed-off-by: Josef 'Jeff' Sipek <jsipek@cs.sunysb.edu>
---
 fs/unionfs/fanout.h |    8 +++++++-
 fs/unionfs/super.c  |    6 ------
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/fs/unionfs/fanout.h b/fs/unionfs/fanout.h
index d4933ce..4da34c6 100644
--- a/fs/unionfs/fanout.h
+++ b/fs/unionfs/fanout.h
@@ -18,7 +18,13 @@
 #ifndef _FANOUT_H_
 #define _FANOUT_H_
 
-/* Inode to private data */
+/*
+ * Inode to private data
+ *
+ * Since we use containers and the struct inode is _inside_ the
+ * unionfs_inode_info structure, UNIONFS_I will always (given a non-NULL
+ * inode pointer), return a valid non-NULL pointer.
+ */
 static inline struct unionfs_inode_info *UNIONFS_I(const struct inode *inode)
 {
 	return container_of(inode, struct unionfs_inode_info, vfs_inode);
diff --git a/fs/unionfs/super.c b/fs/unionfs/super.c
index 9f248b9..0e6dad1 100644
--- a/fs/unionfs/super.c
+++ b/fs/unionfs/super.c
@@ -32,12 +32,6 @@ static void unionfs_read_inode(struct inode *inode)
 
 	unionfs_read_lock(inode->i_sb);
 
-	if (!info) {
-		printk(KERN_ERR "unionfs: no kernel memory when allocating "
-		       "inode private data!\n");
-		BUG();
-	}
-
 	memset(info, 0, offsetof(struct unionfs_inode_info, vfs_inode));
 	info->bstart = -1;
 	info->bend = -1;
-- 
1.5.2.rc1.165.gaf9b


      parent reply	other threads:[~2007-06-17 19:10 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-06-17 19:09 [GIT PULL -mm] Unionfs cleanups, fixes, and mmap Josef 'Jeff' Sipek
2007-06-17 19:09 ` [PATCH 01/16] [PATCH] unionfs section mismatch Josef 'Jeff' Sipek
2007-06-17 19:09 ` [PATCH 02/16] Unionfs: Don't revalidate dropped dentries Josef 'Jeff' Sipek
2007-06-17 19:09 ` [PATCH 03/16] Unionfs: Retry lookup for different silly-renamed files Josef 'Jeff' Sipek
2007-06-17 19:09 ` [PATCH 04/16] Unionfs: Set lower inodes correctly after branch management succeeds Josef 'Jeff' Sipek
2007-06-17 19:09 ` [PATCH 05/16] Unionfs: call statfs on lower file system properly Josef 'Jeff' Sipek
2007-06-17 19:09 ` [PATCH 06/16] MAINTAINERS: Add Erez Zadok as a maintainer of Unionfs Josef 'Jeff' Sipek
2007-06-17 19:09 ` [PATCH 07/16] Unionfs: Add standard copyright comment to include/linux/union_fs.h Josef 'Jeff' Sipek
2007-06-17 19:09 ` [PATCH 08/16] Unionfs: Remove unnecessary #define Josef 'Jeff' Sipek
2007-06-17 19:09 ` [PATCH 09/16] Unionfs: mmap implementation Josef 'Jeff' Sipek
2007-06-17 19:09 ` [PATCH 10/16] Unionfs: merge find_new_branch_index and branch_id_to_idx into one function Josef 'Jeff' Sipek
2007-06-17 19:09 ` [PATCH 11/16] Unionfs: Revalidate dentries passed to all inode/super operations Josef 'Jeff' Sipek
2007-06-17 19:09 ` [PATCH 12/16] Unionfs: Cleanup new_dentry_private_data Josef 'Jeff' Sipek
2007-06-17 19:09 ` [PATCH 13/16] Unionfs: Change free_dentry_private_info to take a struct dentry Josef 'Jeff' Sipek
2007-06-17 19:09 ` [PATCH 14/16] Unionfs: Add BUG_ONs to unionfs_lower_* Josef 'Jeff' Sipek
2007-06-17 19:09 ` [PATCH 15/16] Unionfs: Change the semantics of sb info's rwsem Josef 'Jeff' Sipek
2007-06-17 19:09 ` Josef 'Jeff' Sipek [this message]

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