[PATCH] (semi)revert compat.h to old version

[PATCH] (semi)revert compat.h to old version

[Филип Брчић]

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Hi,

Without this patch btrfs doesn't compile on my system. I have Linux 2.6.27.8 
on x86_64 compiled with gcc 4.1.2.

This is mostly the old compat.h with one typedef removed (typedef unsigned 
__bitwise__ fmode_t;) as it was already defined on my system.

Happy hacking :)
Brcha

-- 
Filip Brčić <brcha@gna.org>
WWWeb: http://www.brcha.iz.rs
Jabber: brcha@kdetalk.net



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diff --git a/compat.h b/compat.h
index 7c4503e..204cda7 100644
--- a/compat.h
+++ b/compat.h
@@ -4,4 +4,29 @@
 #define btrfs_drop_nlink(inode) drop_nlink(inode)
 #define btrfs_inc_nlink(inode)	inc_nlink(inode)
 
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 27)
+static inline struct dentry *d_obtain_alias(struct inode *inode)
+{
+	struct dentry *d;
+
+	if (!inode)
+		return NULL;
+	if (IS_ERR(inode))
+		return ERR_CAST(inode);
+
+	d = d_alloc_anon(inode);
+	if (!d)
+		iput(inode);
+	return d;
+}
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 28)
+# define  __pagevec_lru_add_file __pagevec_lru_add
+# define open_bdev_exclusive open_bdev_excl
+# define close_bdev_exclusive(bdev, mode) close_bdev_excl(bdev)
+/* typedef unsigned __bitwise__ fmode_t; */
+#endif
+
+
 #endif /* _COMPAT_H_ */

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