Merge branch 'linus' into irq/genirq

18 files changed, 48 insertions, 37 deletions

diff --git a/fs/Makefile b/fs/Makefile
index 38bc735..dc20db3 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -69,10 +69,12 @@ obj-$(CONFIG_DLM)		+= dlm/
 # Do not add any filesystems before this line
 obj-$(CONFIG_REISERFS_FS)	+= reiserfs/
 obj-$(CONFIG_EXT3_FS)		+= ext3/ # Before ext2 so root fs can be ext3
-obj-$(CONFIG_EXT4_FS)		+= ext4/ # Before ext2 so root fs can be ext4
+obj-$(CONFIG_EXT2_FS)		+= ext2/
+# We place ext4 after ext2 so plain ext2 root fs's are mounted using ext2
+# unless explicitly requested by rootfstype
+obj-$(CONFIG_EXT4_FS)		+= ext4/
 obj-$(CONFIG_JBD)		+= jbd/
 obj-$(CONFIG_JBD2)		+= jbd2/
-obj-$(CONFIG_EXT2_FS)		+= ext2/
 obj-$(CONFIG_CRAMFS)		+= cramfs/
 obj-$(CONFIG_SQUASHFS)		+= squashfs/
 obj-y				+= ramfs/
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 42491d7..37f31b5 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -277,7 +277,7 @@ static noinline int __btrfs_cow_block(struct btrfs_trans_handle *trans,
 	if (*cow_ret == buf)
 		unlock_orig = 1;
 
-	WARN_ON(!btrfs_tree_locked(buf));
+	btrfs_assert_tree_locked(buf);
 
 	if (parent)
 		parent_start = parent->start;
@@ -2365,7 +2365,7 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
 	if (slot >= btrfs_header_nritems(upper) - 1)
 		return 1;
 
-	WARN_ON(!btrfs_tree_locked(path->nodes[1]));
+	btrfs_assert_tree_locked(path->nodes[1]);
 
 	right = read_node_slot(root, upper, slot + 1);
 	btrfs_tree_lock(right);
@@ -2562,7 +2562,7 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
 	if (right_nritems == 0)
 		return 1;
 
-	WARN_ON(!btrfs_tree_locked(path->nodes[1]));
+	btrfs_assert_tree_locked(path->nodes[1]);
 
 	left = read_node_slot(root, path->nodes[1], slot - 1);
 	btrfs_tree_lock(left);
@@ -4101,7 +4101,7 @@ int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path)
 
 		next = read_node_slot(root, c, slot);
 		if (!path->skip_locking) {
-			WARN_ON(!btrfs_tree_locked(c));
+			btrfs_assert_tree_locked(c);
 			btrfs_tree_lock(next);
 			btrfs_set_lock_blocking(next);
 		}
@@ -4126,7 +4126,7 @@ int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path)
 			reada_for_search(root, path, level, slot, 0);
 		next = read_node_slot(root, next, 0);
 		if (!path->skip_locking) {
-			WARN_ON(!btrfs_tree_locked(path->nodes[level]));
+			btrfs_assert_tree_locked(path->nodes[level]);
 			btrfs_tree_lock(next);
 			btrfs_set_lock_blocking(next);
 		}
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index adda739..3e18175 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -857,7 +857,7 @@ int clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
 	struct inode *btree_inode = root->fs_info->btree_inode;
 	if (btrfs_header_generation(buf) ==
 	    root->fs_info->running_transaction->transid) {
-		WARN_ON(!btrfs_tree_locked(buf));
+		btrfs_assert_tree_locked(buf);
 
 		/* ugh, clear_extent_buffer_dirty can be expensive */
 		btrfs_set_lock_blocking(buf);
@@ -2361,7 +2361,7 @@ void btrfs_mark_buffer_dirty(struct extent_buffer *buf)
 
 	btrfs_set_lock_blocking(buf);
 
-	WARN_ON(!btrfs_tree_locked(buf));
+	btrfs_assert_tree_locked(buf);
 	if (transid != root->fs_info->generation) {
 		printk(KERN_CRIT "btrfs transid mismatch buffer %llu, "
 		       "found %llu running %llu\n",
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 6b5966a..9abf81f 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -4418,13 +4418,13 @@ int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
 	path = btrfs_alloc_path();
 	BUG_ON(!path);
 
-	BUG_ON(!btrfs_tree_locked(parent));
+	btrfs_assert_tree_locked(parent);
 	parent_level = btrfs_header_level(parent);
 	extent_buffer_get(parent);
 	path->nodes[parent_level] = parent;
 	path->slots[parent_level] = btrfs_header_nritems(parent);
 
-	BUG_ON(!btrfs_tree_locked(node));
+	btrfs_assert_tree_locked(node);
 	level = btrfs_header_level(node);
 	extent_buffer_get(node);
 	path->nodes[level] = node;
diff --git a/fs/btrfs/locking.c b/fs/btrfs/locking.c
index 85506c4..47b0a88 100644
--- a/fs/btrfs/locking.c
+++ b/fs/btrfs/locking.c
@@ -220,8 +220,8 @@ int btrfs_tree_unlock(struct extent_buffer *eb)
 	return 0;
 }
 
-int btrfs_tree_locked(struct extent_buffer *eb)
+void btrfs_assert_tree_locked(struct extent_buffer *eb)
 {
-	return test_bit(EXTENT_BUFFER_BLOCKING, &eb->bflags) ||
-			spin_is_locked(&eb->lock);
+	if (!test_bit(EXTENT_BUFFER_BLOCKING, &eb->bflags))
+		assert_spin_locked(&eb->lock);
 }
diff --git a/fs/btrfs/locking.h b/fs/btrfs/locking.h
index 6bb0afb..6c4ce45 100644
--- a/fs/btrfs/locking.h
+++ b/fs/btrfs/locking.h
@@ -21,11 +21,11 @@
 
 int btrfs_tree_lock(struct extent_buffer *eb);
 int btrfs_tree_unlock(struct extent_buffer *eb);
-int btrfs_tree_locked(struct extent_buffer *eb);
 
 int btrfs_try_tree_lock(struct extent_buffer *eb);
 int btrfs_try_spin_lock(struct extent_buffer *eb);
 
 void btrfs_set_lock_blocking(struct extent_buffer *eb);
 void btrfs_clear_lock_blocking(struct extent_buffer *eb);
+void btrfs_assert_tree_locked(struct extent_buffer *eb);
 #endif
diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index 5f3231b..bff4052 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -198,9 +198,6 @@ static int mknod_ptmx(struct super_block *sb)
 
 	fsi->ptmx_dentry = dentry;
 	rc = 0;
-
-	printk(KERN_DEBUG "Created ptmx node in devpts ino %lu\n",
-			inode->i_ino);
 out:
 	mutex_unlock(&root->d_inode->i_mutex);
 	return rc;
@@ -369,8 +366,6 @@ static int new_pts_mount(struct file_system_type *fs_type, int flags,
 	struct pts_fs_info *fsi;
 	struct pts_mount_opts *opts;
 
-	printk(KERN_NOTICE "devpts: newinstance mount\n");
-
 	err = get_sb_nodev(fs_type, flags, data, devpts_fill_super, mnt);
 	if (err)
 		return err;
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 9a50b80..de9459b 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -609,7 +609,9 @@ int ext4_claim_free_blocks(struct ext4_sb_info *sbi,
  */
 int ext4_should_retry_alloc(struct super_block *sb, int *retries)
 {
-	if (!ext4_has_free_blocks(EXT4_SB(sb), 1) || (*retries)++ > 3)
+	if (!ext4_has_free_blocks(EXT4_SB(sb), 1) ||
+	    (*retries)++ > 3 ||
+	    !EXT4_SB(sb)->s_journal)
 		return 0;
 
 	jbd_debug(1, "%s: retrying operation after ENOSPC\n", sb->s_id);
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index f18a919..627f8c3 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -188,7 +188,7 @@ void ext4_free_inode(handle_t *handle, struct inode *inode)
 	struct ext4_group_desc *gdp;
 	struct ext4_super_block *es;
 	struct ext4_sb_info *sbi;
-	int fatal = 0, err, count;
+	int fatal = 0, err, count, cleared;
 	ext4_group_t flex_group;
 
 	if (atomic_read(&inode->i_count) > 1) {
@@ -248,8 +248,10 @@ void ext4_free_inode(handle_t *handle, struct inode *inode)
 		goto error_return;
 
 	/* Ok, now we can actually update the inode bitmaps.. */
-	if (!ext4_clear_bit_atomic(sb_bgl_lock(sbi, block_group),
-					bit, bitmap_bh->b_data))
+	spin_lock(sb_bgl_lock(sbi, block_group));
+	cleared = ext4_clear_bit(bit, bitmap_bh->b_data);
+	spin_unlock(sb_bgl_lock(sbi, block_group));
+	if (!cleared)
 		ext4_error(sb, "ext4_free_inode",
 			   "bit already cleared for inode %lu", ino);
 	else {
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 51cdd13..c7fed5b 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2544,7 +2544,7 @@ retry:
 
 		ext4_journal_stop(handle);
 
-		if (mpd.retval == -ENOSPC) {
+		if ((mpd.retval == -ENOSPC) && sbi->s_journal) {
 			/* commit the transaction which would
 			 * free blocks released in the transaction
 			 * and try again
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index a5732c5..39d1993 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3091,7 +3091,6 @@ static int ext4_freeze(struct super_block *sb)
 
 		/* Journal blocked and flushed, clear needs_recovery flag. */
 		EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
-		ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1);
 		error = ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1);
 		if (error)
 			goto out;
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 6b74d09..de0004f 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -202,9 +202,9 @@ static sector_t _fat_bmap(struct address_space *mapping, sector_t block)
 	sector_t blocknr;
 
 	/* fat_get_cluster() assumes the requested blocknr isn't truncated. */
-	mutex_lock(&mapping->host->i_mutex);
+	down_read(&mapping->host->i_alloc_sem);
 	blocknr = generic_block_bmap(mapping, block, fat_get_block);
-	mutex_unlock(&mapping->host->i_mutex);
+	up_read(&mapping->host->i_alloc_sem);
 
 	return blocknr;
 }
diff --git a/fs/proc/page.c b/fs/proc/page.c
index 2d13451..e998383 100644
--- a/fs/proc/page.c
+++ b/fs/proc/page.c
@@ -80,7 +80,7 @@ static const struct file_operations proc_kpagecount_operations = {
 #define KPF_RECLAIM    9
 #define KPF_BUDDY     10
 
-#define kpf_copy_bit(flags, srcpos, dstpos) (((flags >> srcpos) & 1) << dstpos)
+#define kpf_copy_bit(flags, dstpos, srcpos) (((flags >> srcpos) & 1) << dstpos)
 
 static ssize_t kpageflags_read(struct file *file, char __user *buf,
 			     size_t count, loff_t *ppos)
diff --git a/fs/squashfs/block.c b/fs/squashfs/block.c
index c837dfc..321728f 100644
--- a/fs/squashfs/block.c
+++ b/fs/squashfs/block.c
@@ -80,7 +80,7 @@ static struct buffer_head *get_block_length(struct super_block *sb,
  * generated a larger block - this does occasionally happen with zlib).
  */
 int squashfs_read_data(struct super_block *sb, void **buffer, u64 index,
-			int length, u64 *next_index, int srclength)
+			int length, u64 *next_index, int srclength, int pages)
 {
 	struct squashfs_sb_info *msblk = sb->s_fs_info;
 	struct buffer_head **bh;
@@ -185,6 +185,14 @@ int squashfs_read_data(struct super_block *sb, void **buffer, u64 index,
 			}
 
 			if (msblk->stream.avail_out == 0) {
+				if (page == pages) {
+					ERROR("zlib_inflate tried to "
+						"decompress too much data, "
+						"expected %d bytes.  Zlib "
+						"data probably corrupt\n",
+						srclength);
+					goto release_mutex;
+				}
 				msblk->stream.next_out = buffer[page++];
 				msblk->stream.avail_out = PAGE_CACHE_SIZE;
 			}
@@ -268,7 +276,8 @@ block_release:
 		put_bh(bh[k]);
 
 read_failure:
-	ERROR("sb_bread failed reading block 0x%llx\n", cur_index);
+	ERROR("squashfs_read_data failed to read block 0x%llx\n",
+					(unsigned long long) index);
 	kfree(bh);
 	return -EIO;
 }
diff --git a/fs/squashfs/cache.c b/fs/squashfs/cache.c
index f29eda1..1c4739e 100644
--- a/fs/squashfs/cache.c
+++ b/fs/squashfs/cache.c
@@ -119,7 +119,7 @@ struct squashfs_cache_entry *squashfs_cache_get(struct super_block *sb,
 
 			entry->length = squashfs_read_data(sb, entry->data,
 				block, length, &entry->next_index,
-				cache->block_size);
+				cache->block_size, cache->pages);
 
 			spin_lock(&cache->lock);
 
@@ -406,7 +406,7 @@ int squashfs_read_table(struct super_block *sb, void *buffer, u64 block,
 	for (i = 0; i < pages; i++, buffer += PAGE_CACHE_SIZE)
 		data[i] = buffer;
 	res = squashfs_read_data(sb, data, block, length |
-		SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, length);
+		SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, length, pages);
 	kfree(data);
 	return res;
 }
diff --git a/fs/squashfs/inode.c b/fs/squashfs/inode.c
index 7a63398..9101dbd 100644
--- a/fs/squashfs/inode.c
+++ b/fs/squashfs/inode.c
@@ -133,7 +133,8 @@ int squashfs_read_inode(struct inode *inode, long long ino)
 	type = le16_to_cpu(sqshb_ino->inode_type);
 	switch (type) {
 	case SQUASHFS_REG_TYPE: {
-		unsigned int frag_offset, frag_size, frag;
+		unsigned int frag_offset, frag;
+		int frag_size;
 		u64 frag_blk;
 		struct squashfs_reg_inode *sqsh_ino = &squashfs_ino.reg;
 
@@ -175,7 +176,8 @@ int squashfs_read_inode(struct inode *inode, long long ino)
 		break;
 	}
 	case SQUASHFS_LREG_TYPE: {
-		unsigned int frag_offset, frag_size, frag;
+		unsigned int frag_offset, frag;
+		int frag_size;
 		u64 frag_blk;
 		struct squashfs_lreg_inode *sqsh_ino = &squashfs_ino.lreg;
 
diff --git a/fs/squashfs/squashfs.h b/fs/squashfs/squashfs.h
index 6b2515d..0e9feb6 100644
--- a/fs/squashfs/squashfs.h
+++ b/fs/squashfs/squashfs.h
@@ -34,7 +34,7 @@ static inline struct squashfs_inode_info *squashfs_i(struct inode *inode)
 
 /* block.c */
 extern int squashfs_read_data(struct super_block *, void **, u64, int, u64 *,
-				int);
+				int, int);
 
 /* cache.c */
 extern struct squashfs_cache *squashfs_cache_init(char *, int, int);
diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c
index 071df5b..681ec0d 100644
--- a/fs/squashfs/super.c
+++ b/fs/squashfs/super.c
@@ -389,7 +389,7 @@ static int __init init_squashfs_fs(void)
 		return err;
 	}
 
-	printk(KERN_INFO "squashfs: version 4.0 (2009/01/03) "
+	printk(KERN_INFO "squashfs: version 4.0 (2009/01/31) "
 		"Phillip Lougher\n");
 
 	return 0;