Commit 0ee0fda0 authored by Sven Wegener's avatar Sven Wegener Committed by Chris Mason
Browse files

Btrfs: Add compatibility for kernels >= 2.6.27-rc1 



Add a couple of #if's to follow API changes.

Signed-off-by: default avatarSven Wegener <sven.wegener@stealer.net>
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent bcc63abb

fs/btrfs/extent_io.c

+23 −0
Original line number Diff line number Diff line
@@ -2649,9 +2649,24 @@ static inline struct page *extent_buffer_page(struct extent_buffer *eb, 
	mapping = eb->first_page->mapping;

	if (!mapping)

		return NULL;



	/*

	 * extent_buffer_page is only called after pinning the page

	 * by increasing the reference count.  So we know the page must

	 * be in the radix tree.

	 */

#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,26)

	rcu_read_lock();

#else

	read_lock_irq(&mapping->tree_lock);

#endif

	p = radix_tree_lookup(&mapping->page_tree, i);



#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,26)

	rcu_read_unlock();

#else

	read_unlock_irq(&mapping->tree_lock);

#endif

	return p;

}
@@ -2843,13 +2858,21 @@ int clear_extent_buffer_dirty(struct extent_io_tree *tree, 
			}

		}

		clear_page_dirty_for_io(page);

#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,26)

		spin_lock_irq(&page->mapping->tree_lock);

#else

		read_lock_irq(&page->mapping->tree_lock);

#endif

		if (!PageDirty(page)) {

			radix_tree_tag_clear(&page->mapping->page_tree,

						page_index(page),

						PAGECACHE_TAG_DIRTY);

		}

#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,26)

		spin_unlock_irq(&page->mapping->tree_lock);

#else

		read_unlock_irq(&page->mapping->tree_lock);

#endif

		unlock_page(page);

	}

	return 0;

fs/btrfs/file.c

+4 −0
Original line number Diff line number Diff line
@@ -885,8 +885,12 @@ static ssize_t btrfs_file_write(struct file *file, const char __user *buf, 
		goto out_nolock;

#ifdef REMOVE_SUID_PATH

	err = remove_suid(&file->f_path);

#else

# if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,26)

	err = file_remove_suid(file);

# else

	err = remove_suid(fdentry(file));

# endif

#endif

	if (err)

		goto out_nolock;

fs/btrfs/inode.c

+10 −2
Original line number Diff line number Diff line
@@ -3293,7 +3293,9 @@ void btrfs_destroy_inode(struct inode *inode) 
	kmem_cache_free(btrfs_inode_cachep, BTRFS_I(inode));

}



#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,23)

#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,26)

static void init_once(void *foo)

#elif LINUX_VERSION_CODE > KERNEL_VERSION(2,6,23)

static void init_once(struct kmem_cache * cachep, void *foo)

#else

static void init_once(void * foo, struct kmem_cache * cachep,
@@ -3321,7 +3323,9 @@ void btrfs_destroy_cachep(void) 


struct kmem_cache *btrfs_cache_create(const char *name, size_t size,

				       unsigned long extra_flags,

#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,23)

#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,26)

				       void (*ctor)(void *)

#elif LINUX_VERSION_CODE > KERNEL_VERSION(2,6,23)

				       void (*ctor)(struct kmem_cache *, void *)

#else

				       void (*ctor)(void *, struct kmem_cache *,
@@ -3561,8 +3565,12 @@ static int btrfs_set_page_dirty(struct page *page) 
	return __set_page_dirty_nobuffers(page);

}



#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,26)

static int btrfs_permission(struct inode *inode, int mask)

#else

static int btrfs_permission(struct inode *inode, int mask,

			    struct nameidata *nd)

#endif

{

	if (btrfs_test_flag(inode, READONLY) && (mask & MAY_WRITE))

		return -EACCES;