From: Mingming Cao <cmm@us.ibm.com>

Previously when in-kernel ext4 block type is sector_t, it's only 4 bits long under some 32bit arch (when CONFIG_LBD is not on). So we need to check the size of sector_t before we read 48bit long on-disk blocks to in-kernel blocks.

These checks are unnecessary now as we changed the in-kernel blocks to unsigned longlong.

Signed-Off-By: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>

Index: linux-2.6.18-mm1/fs/ext4/extents.c
===================================================================
---
diff -Nurp linux018/fs/ext4/extents.c linux019/fs/ext4/extents.c
--- linux018/fs/ext4/extents.c	2006-10-05 07:39:08.000000000 -0500
+++ linux019/fs/ext4/extents.c	2006-10-05 07:39:08.000000000 -0500
@@ -53,8 +53,7 @@ static inline ext4_fsblk_t ext_pblock(st
 	ext4_fsblk_t block;
 
 	block = le32_to_cpu(ex->ee_start);
-	if (sizeof(ext4_fsblk_t) > 4)
-		block |= ((ext4_fsblk_t) le16_to_cpu(ex->ee_start_hi) << 31) << 1;
+	block |= ((ext4_fsblk_t) le16_to_cpu(ex->ee_start_hi) << 31) << 1;
 	return block;
 }
 
@@ -67,8 +66,7 @@ static inline ext4_fsblk_t idx_pblock(st
 	ext4_fsblk_t block;
 
 	block = le32_to_cpu(ix->ei_leaf);
-	if (sizeof(ext4_fsblk_t) > 4)
-		block |= ((ext4_fsblk_t) le16_to_cpu(ix->ei_leaf_hi) << 31) << 1;
+	block |= ((ext4_fsblk_t) le16_to_cpu(ix->ei_leaf_hi) << 31) << 1;
 	return block;
 }
 
@@ -80,8 +78,7 @@ static inline ext4_fsblk_t idx_pblock(st
 static inline void ext4_ext_store_pblock(struct ext4_extent *ex, ext4_fsblk_t pb)
 {
 	ex->ee_start = cpu_to_le32((unsigned long) (pb & 0xffffffff));
-	if (sizeof(ext4_fsblk_t) > 4)
-		ex->ee_start_hi = cpu_to_le16((unsigned long) ((pb >> 31) >> 1) & 0xffff);
+	ex->ee_start_hi = cpu_to_le16((unsigned long) ((pb >> 31) >> 1) & 0xffff);
 }
 
 /*
@@ -92,8 +89,7 @@ static inline void ext4_ext_store_pblock
 static inline void ext4_idx_store_pblock(struct ext4_extent_idx *ix, ext4_fsblk_t pb)
 {
 	ix->ei_leaf = cpu_to_le32((unsigned long) (pb & 0xffffffff));
-	if (sizeof(ext4_fsblk_t) > 4)
-		ix->ei_leaf_hi = cpu_to_le16((unsigned long) ((pb >> 31) >> 1) & 0xffff);
+	ix->ei_leaf_hi = cpu_to_le16((unsigned long) ((pb >> 31) >> 1) & 0xffff);
 }
 
 static int ext4_ext_check_header(const char *function, struct inode *inode,
diff -Nurp linux018/fs/ext4/inode.c linux019/fs/ext4/inode.c
--- linux018/fs/ext4/inode.c	2006-10-05 07:39:08.000000000 -0500
+++ linux019/fs/ext4/inode.c	2006-10-05 07:39:08.000000000 -0500
@@ -2643,9 +2643,8 @@ void ext4_read_inode(struct inode * inod
 	ei->i_frag_size = raw_inode->i_fsize;
 #endif
 	ei->i_file_acl = le32_to_cpu(raw_inode->i_file_acl);
-	if ((sizeof(sector_t) > 4) &&
-	    (EXT4_SB(inode->i_sb)->s_es->s_creator_os !=
-	     cpu_to_le32(EXT4_OS_HURD)))
+	if (EXT4_SB(inode->i_sb)->s_es->s_creator_os !=
+	    cpu_to_le32(EXT4_OS_HURD))
 		ei->i_file_acl |=
 			((__u64)le16_to_cpu(raw_inode->i_file_acl_high)) << 32;
 	if (!S_ISREG(inode->i_mode)) {
@@ -2781,9 +2780,8 @@ static int ext4_do_update_inode(handle_t
 	raw_inode->i_frag = ei->i_frag_no;
 	raw_inode->i_fsize = ei->i_frag_size;
 #endif
-	if ((sizeof(sector_t) > 4) &&
-	    (EXT4_SB(inode->i_sb)->s_es->s_creator_os !=
-	     cpu_to_le32(EXT4_OS_HURD)))
+	if (EXT4_SB(inode->i_sb)->s_es->s_creator_os !=
+	    cpu_to_le32(EXT4_OS_HURD))
 		raw_inode->i_file_acl_high =
 			cpu_to_le16(ei->i_file_acl >> 32);
 	raw_inode->i_file_acl = cpu_to_le32(ei->i_file_acl);