[PATCH] Add compability for kernels >=2.6.27-rc1

Sven Wegener
2008-07-30T19:11:34Z

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

Signed-off-by: Sven Wegener <sven.wegener@stealer.net>
---
extent_io.c | 16 ++++++++++++++++
file.c | 4 ++++
inode.c | 12 ++++++++++--
3 files changed, 30 insertions(+), 2 deletions(-)

Having passed the rc1 mark the API changes should be finished.

Other #if in the source use >version instead of >=version+1, so I use them
too.

Patch is against the current unstable repository, but can applied with a
slight modification (extent_io.c) to the stable repository too.

diff -r 59ec68fb1540 extent_io.c
--- a/extent_io.c Wed Jul 30 10:29:12 2008 -0400
+++ b/extent_io.c Wed Jul 30 19:00:28 2008 +0000
@@ -2649,9 +2649,17 @@
mapping = eb->first_page->mapping;
if (!mapping)
return NULL;
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,26)
+ spin_lock_irq(&mapping->tree_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)
+ spin_unlock_irq(&mapping->tree_lock);
+#else
read_unlock_irq(&mapping->tree_lock);
+#endif
return p;
}

@@ -2843,13 +2851,21 @@
}
}
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;
diff -r 59ec68fb1540 file.c
--- a/file.c Wed Jul 30 10:29:12 2008 -0400
+++ b/file.c Wed Jul 30 19:00:28 2008 +0000
@@ -886,7 +886,11 @@
#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;
diff -r 59ec68fb1540 inode.c
--- a/inode.c Wed Jul 30 10:29:12 2008 -0400
+++ b/inode.c Wed Jul 30 19:00:28 2008 +0000
@@ -3293,7 +3293,9 @@
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 @@

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 @@
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;