[PATCH]: ext4: fix big endian (was: not enough memory for 522250 flex groups)

[Christian Borntraeger]

Ok, I think I found it:

On big endianess plattforms newly created ext4 file systems cannot be mounted
and show messages like:
[6923911.715968] EXT4-fs: not enough memory for 522250 flex groups
[6923911.715973] EXT4-fs: unable to initialize flex_bg meta info!

We have to access s_reserved_gdb_blocks with le16_to_cpu.

Signed-off-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
---
 fs/ext4/super.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: kvm/fs/ext4/super.c
===================================================================
--- kvm.orig/fs/ext4/super.c
+++ kvm/fs/ext4/super.c
@@ -1455,7 +1455,7 @@ static int ext4_fill_flex_info(struct su
 
 	/* We allocate both existing and potentially added groups */
 	flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) +
-			    ((sbi->s_es->s_reserved_gdt_blocks +1 ) <<
+			    (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks + 1) <<
 			      EXT4_DESC_PER_BLOCK_BITS(sb))) /
 			   groups_per_flex;
 	sbi->s_flex_groups = kzalloc(flex_group_count *
--
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