diff --git a/libc/kernel/common/linux/jbd.h b/libc/kernel/common/linux/jbd.h
new file mode 100644
index 0000000..7ba766c
--- /dev/null
+++ b/libc/kernel/common/linux/jbd.h
@@ -0,0 +1,118 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef _LINUX_JBD_H
+#define _LINUX_JBD_H
+
+#include "jfs_compat.h"
+#define JFS_DEBUG
+#define jfs_debug jbd_debug
+
+#define journal_oom_retry 1
+
+#undef JBD_PARANOID_IOFAIL
+
+#define JBD_DEFAULT_MAX_COMMIT_AGE 5
+
+#define jbd_debug(f, a...)  
+
+#define jbd_kmalloc(size, flags)   __jbd_kmalloc(__FUNCTION__, (size), (flags), journal_oom_retry)
+#define jbd_rep_kmalloc(size, flags)   __jbd_kmalloc(__FUNCTION__, (size), (flags), 1)
+
+#define JFS_MIN_JOURNAL_BLOCKS 1024
+
+#define JFS_MAGIC_NUMBER 0xc03b3998U  
+
+#define JFS_DESCRIPTOR_BLOCK 1
+#define JFS_COMMIT_BLOCK 2
+#define JFS_SUPERBLOCK_V1 3
+#define JFS_SUPERBLOCK_V2 4
+#define JFS_REVOKE_BLOCK 5
+
+typedef struct journal_header_s
+{
+ __be32 h_magic;
+ __be32 h_blocktype;
+ __be32 h_sequence;
+} journal_header_t;
+
+typedef struct journal_block_tag_s
+{
+ __be32 t_blocknr;
+ __be32 t_flags;
+} journal_block_tag_t;
+
+typedef struct journal_revoke_header_s
+{
+ journal_header_t r_header;
+ __be32 r_count;
+} journal_revoke_header_t;
+
+#define JFS_FLAG_ESCAPE 1  
+#define JFS_FLAG_SAME_UUID 2  
+#define JFS_FLAG_DELETED 4  
+#define JFS_FLAG_LAST_TAG 8  
+
+typedef struct journal_superblock_s
+{
+
+ journal_header_t s_header;
+
+ __be32 s_blocksize;
+ __be32 s_maxlen;
+ __be32 s_first;
+
+ __be32 s_sequence;
+ __be32 s_start;
+
+ __be32 s_errno;
+
+ __be32 s_feature_compat;
+ __be32 s_feature_incompat;
+ __be32 s_feature_ro_compat;
+
+ __u8 s_uuid[16];
+
+ __be32 s_nr_users;
+
+ __be32 s_dynsuper;
+
+ __be32 s_max_transaction;
+ __be32 s_max_trans_data;
+
+ __u32 s_padding[44];
+
+ __u8 s_users[16*48];
+
+} journal_superblock_t;
+
+#define JFS_HAS_COMPAT_FEATURE(j,mask)   ((j)->j_format_version >= 2 &&   ((j)->j_superblock->s_feature_compat & cpu_to_be32((mask))))
+#define JFS_HAS_RO_COMPAT_FEATURE(j,mask)   ((j)->j_format_version >= 2 &&   ((j)->j_superblock->s_feature_ro_compat & cpu_to_be32((mask))))
+#define JFS_HAS_INCOMPAT_FEATURE(j,mask)   ((j)->j_format_version >= 2 &&   ((j)->j_superblock->s_feature_incompat & cpu_to_be32((mask))))
+
+#define JFS_FEATURE_INCOMPAT_REVOKE 0x00000001
+
+#define JFS_KNOWN_COMPAT_FEATURES 0
+#define JFS_KNOWN_ROCOMPAT_FEATURES 0
+#define JFS_KNOWN_INCOMPAT_FEATURES JFS_FEATURE_INCOMPAT_REVOKE
+
+#define BJ_None 0  
+#define BJ_SyncData 1  
+#define BJ_Metadata 2  
+#define BJ_Forget 3  
+#define BJ_IO 4  
+#define BJ_Shadow 5  
+#define BJ_LogCtl 6  
+#define BJ_Reserved 7  
+#define BJ_Locked 8  
+#define BJ_Types 9
+
+#endif