ext4: realign trace events structs to make it smaller

Most hardware architectures require that data (including struct fields)
have to be aligned in memory. To make it happen compiler inserts padding
between struct fields if they are not aligned correctly.

Reorder fields to remove paddings and make structures denser. Making data
smaller saves some memory that is very important for trace events.
Tracing buffer has limited size and making objects smaller we can put more
of them without overflowing the tracing buffer.

To find data struct holes I used 'pahole -H 1 -E -I vmlinux.o' from
'dwarves' package.
Signed-off-by: Anatol Pomozov <anatol.pomozov@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

include/trace/events/ext4.h

@@ -26,19 +26,19 @@ TRACE_EVENT(ext4_free_inode,
 	TP_STRUCT__entry(
 		__field(	dev_t,	dev			)
 		__field(	ino_t,	ino			)
-		__field(	__u16, mode			)
 		__field(	uid_t,	uid			)
 		__field(	gid_t,	gid			)
 		__field(	__u64, blocks			)
+		__field(	__u16, mode			)
 	),
 
 	TP_fast_assign(
 		__entry->dev	= inode->i_sb->s_dev;
 		__entry->ino	= inode->i_ino;
-		__entry->mode	= inode->i_mode;
 		__entry->uid	= i_uid_read(inode);
 		__entry->gid	= i_gid_read(inode);
 		__entry->blocks	= inode->i_blocks;
+		__entry->mode	= inode->i_mode;
 	),
 
 	TP_printk("dev %d,%d ino %lu mode 0%o uid %u gid %u blocks %llu",
@@ -300,10 +300,10 @@ TRACE_EVENT(ext4_da_writepages,
 		__field(	long,	pages_skipped		)
 		__field(	loff_t,	range_start		)
 		__field(	loff_t,	range_end		)
+		__field(       pgoff_t,	writeback_index		)
 		__field(	int,	sync_mode		)
 		__field(	char,	for_kupdate		)
 		__field(	char,	range_cyclic		)
-		__field(       pgoff_t,	writeback_index		)
 	),
 
 	TP_fast_assign(
@@ -313,10 +313,10 @@ TRACE_EVENT(ext4_da_writepages,
 		__entry->pages_skipped	= wbc->pages_skipped;
 		__entry->range_start	= wbc->range_start;
 		__entry->range_end	= wbc->range_end;
+		__entry->writeback_index = inode->i_mapping->writeback_index;
 		__entry->sync_mode	= wbc->sync_mode;
 		__entry->for_kupdate	= wbc->for_kupdate;
 		__entry->range_cyclic	= wbc->range_cyclic;
-		__entry->writeback_index = inode->i_mapping->writeback_index;
 	),
 
 	TP_printk("dev %d,%d ino %lu nr_to_write %ld pages_skipped %ld "
@@ -382,8 +382,8 @@ TRACE_EVENT(ext4_da_writepages_result,
 		__field(	int,	ret			)
 		__field(	int,	pages_written		)
 		__field(	long,	pages_skipped		)
-		__field(	int,	sync_mode		)
 		__field(       pgoff_t,	writeback_index		)
+		__field(	int,	sync_mode		)
 	),
 
 	TP_fast_assign(
@@ -392,8 +392,8 @@ TRACE_EVENT(ext4_da_writepages_result,
 		__entry->ret		= ret;
 		__entry->pages_written	= pages_written;
 		__entry->pages_skipped	= wbc->pages_skipped;
-		__entry->sync_mode	= wbc->sync_mode;
 		__entry->writeback_index = inode->i_mapping->writeback_index;
+		__entry->sync_mode	= wbc->sync_mode;
 	),
 
 	TP_printk("dev %d,%d ino %lu ret %d pages_written %d pages_skipped %ld "
@@ -411,16 +411,16 @@ DECLARE_EVENT_CLASS(ext4__page_op,
 	TP_ARGS(page),
 
 	TP_STRUCT__entry(
-		__field(	pgoff_t, index			)
-		__field(	ino_t,	ino			)
 		__field(	dev_t,	dev			)
+		__field(	ino_t,	ino			)
+		__field(	pgoff_t, index			)
 
 	),
 
 	TP_fast_assign(
-		__entry->index	= page->index;
-		__entry->ino	= page->mapping->host->i_ino;
 		__entry->dev	= page->mapping->host->i_sb->s_dev;
+		__entry->ino	= page->mapping->host->i_ino;
+		__entry->index	= page->index;
 	),
 
 	TP_printk("dev %d,%d ino %lu page_index %lu",
@@ -456,18 +456,18 @@ TRACE_EVENT(ext4_invalidatepage,
 	TP_ARGS(page, offset),
 
 	TP_STRUCT__entry(
+		__field(	dev_t,	dev			)
+		__field(	ino_t,	ino			)
 		__field(	pgoff_t, index			)
 		__field(	unsigned long, offset		)
-		__field(	ino_t,	ino			)
-		__field(	dev_t,	dev			)
 
 	),
 
 	TP_fast_assign(
+		__entry->dev	= page->mapping->host->i_sb->s_dev;
+		__entry->ino	= page->mapping->host->i_ino;
 		__entry->index	= page->index;
 		__entry->offset	= offset;
-		__entry->ino	= page->mapping->host->i_ino;
-		__entry->dev	= page->mapping->host->i_sb->s_dev;
 	),
 
 	TP_printk("dev %d,%d ino %lu page_index %lu offset %lu",
@@ -510,8 +510,8 @@ DECLARE_EVENT_CLASS(ext4__mb_new_pa,
 		__field(	dev_t,	dev			)
 		__field(	ino_t,	ino			)
 		__field(	__u64,	pa_pstart		)
-		__field(	__u32,	pa_len			)
 		__field(	__u64,	pa_lstart		)
+		__field(	__u32,	pa_len			)
 
 	),
 
@@ -519,8 +519,8 @@ DECLARE_EVENT_CLASS(ext4__mb_new_pa,
 		__entry->dev		= ac->ac_sb->s_dev;
 		__entry->ino		= ac->ac_inode->i_ino;
 		__entry->pa_pstart	= pa->pa_pstart;
-		__entry->pa_len		= pa->pa_len;
 		__entry->pa_lstart	= pa->pa_lstart;
+		__entry->pa_len		= pa->pa_len;
 	),
 
 	TP_printk("dev %d,%d ino %lu pstart %llu len %u lstart %llu",
@@ -645,7 +645,6 @@ TRACE_EVENT(ext4_request_blocks,
 	TP_STRUCT__entry(
 		__field(	dev_t,	dev			)
 		__field(	ino_t,	ino			)
-		__field(	unsigned int, flags		)
 		__field(	unsigned int, len		)
 		__field(	__u32,  logical			)
 		__field(	__u32,	lleft			)
@@ -653,12 +652,12 @@ TRACE_EVENT(ext4_request_blocks,
 		__field(	__u64,	goal			)
 		__field(	__u64,	pleft			)
 		__field(	__u64,	pright			)
+		__field(	unsigned int, flags		)
 	),
 
 	TP_fast_assign(
 		__entry->dev	= ar->inode->i_sb->s_dev;
 		__entry->ino	= ar->inode->i_ino;
-		__entry->flags	= ar->flags;
 		__entry->len	= ar->len;
 		__entry->logical = ar->logical;
 		__entry->goal	= ar->goal;
@@ -666,6 +665,7 @@ TRACE_EVENT(ext4_request_blocks,
 		__entry->lright	= ar->lright;
 		__entry->pleft	= ar->pleft;
 		__entry->pright	= ar->pright;
+		__entry->flags	= ar->flags;
 	),
 
 	TP_printk("dev %d,%d ino %lu flags %u len %u lblk %u goal %llu "
@@ -686,7 +686,6 @@ TRACE_EVENT(ext4_allocate_blocks,
 		__field(	dev_t,	dev			)
 		__field(	ino_t,	ino			)
 		__field(	__u64,	block			)
-		__field(	unsigned int, flags		)
 		__field(	unsigned int, len		)
 		__field(	__u32,  logical			)
 		__field(	__u32,	lleft			)
@@ -694,13 +693,13 @@ TRACE_EVENT(ext4_allocate_blocks,
 		__field(	__u64,	goal			)
 		__field(	__u64,	pleft			)
 		__field(	__u64,	pright			)
+		__field(	unsigned int, flags		)
 	),
 
 	TP_fast_assign(
 		__entry->dev	= ar->inode->i_sb->s_dev;
 		__entry->ino	= ar->inode->i_ino;
 		__entry->block	= block;
-		__entry->flags	= ar->flags;
 		__entry->len	= ar->len;
 		__entry->logical = ar->logical;
 		__entry->goal	= ar->goal;
@@ -708,6 +707,7 @@ TRACE_EVENT(ext4_allocate_blocks,
 		__entry->lright	= ar->lright;
 		__entry->pleft	= ar->pleft;
 		__entry->pright	= ar->pright;
+		__entry->flags	= ar->flags;
 	),
 
 	TP_printk("dev %d,%d ino %lu flags %u len %u block %llu lblk %u "
@@ -728,19 +728,19 @@ TRACE_EVENT(ext4_free_blocks,
 	TP_STRUCT__entry(
 		__field(	dev_t,	dev			)
 		__field(	ino_t,	ino			)
-		__field(	__u16,	mode			)
 		__field(	__u64,	block			)
 		__field(	unsigned long,	count		)
 		__field(	int,	flags			)
+		__field(	__u16,	mode			)
 	),
 
 	TP_fast_assign(
 		__entry->dev		= inode->i_sb->s_dev;
 		__entry->ino		= inode->i_ino;
-		__entry->mode		= inode->i_mode;
 		__entry->block		= block;
 		__entry->count		= count;
 		__entry->flags		= flags;
+		__entry->mode		= inode->i_mode;
 	),
 
 	TP_printk("dev %d,%d ino %lu mode 0%o block %llu count %lu flags %d",
@@ -783,15 +783,15 @@ TRACE_EVENT(ext4_sync_file_exit,
 	TP_ARGS(inode, ret),
 
 	TP_STRUCT__entry(
-		__field(	int,	ret			)
-		__field(	ino_t,	ino			)
 		__field(	dev_t,	dev			)
+		__field(	ino_t,	ino			)
+		__field(	int,	ret			)
 	),
 
 	TP_fast_assign(
-		__entry->ret		= ret;
-		__entry->ino		= inode->i_ino;
 		__entry->dev		= inode->i_sb->s_dev;
+		__entry->ino		= inode->i_ino;
+		__entry->ret		= ret;
 	),
 
 	TP_printk("dev %d,%d ino %lu ret %d",
@@ -854,12 +854,6 @@ TRACE_EVENT(ext4_mballoc_alloc,
 	TP_STRUCT__entry(
 		__field(	dev_t,	dev			)
 		__field(	ino_t,	ino			)
-		__field(	__u16,	found			)
-		__field(	__u16,	groups			)
-		__field(	__u16,	buddy			)
-		__field(	__u16,	flags			)
-		__field(	__u16,	tail			)
-		__field(	__u8,	cr			)
 		__field(	__u32, 	orig_logical		)
 		__field(	  int,	orig_start		)
 		__field(	__u32, 	orig_group		)
@@ -872,17 +866,17 @@ TRACE_EVENT(ext4_mballoc_alloc,
 		__field(	  int,	result_start		)
 		__field(	__u32, 	result_group		)
 		__field(	  int,	result_len		)
+		__field(	__u16,	found			)
+		__field(	__u16,	groups			)
+		__field(	__u16,	buddy			)
+		__field(	__u16,	flags			)
+		__field(	__u16,	tail			)
+		__field(	__u8,	cr			)
 	),
 
 	TP_fast_assign(
 		__entry->dev		= ac->ac_inode->i_sb->s_dev;
 		__entry->ino		= ac->ac_inode->i_ino;
-		__entry->found		= ac->ac_found;
-		__entry->flags		= ac->ac_flags;
-		__entry->groups		= ac->ac_groups_scanned;
-		__entry->buddy		= ac->ac_buddy;
-		__entry->tail		= ac->ac_tail;
-		__entry->cr		= ac->ac_criteria;
 		__entry->orig_logical	= ac->ac_o_ex.fe_logical;
 		__entry->orig_start	= ac->ac_o_ex.fe_start;
 		__entry->orig_group	= ac->ac_o_ex.fe_group;
@@ -895,6 +889,12 @@ TRACE_EVENT(ext4_mballoc_alloc,
 		__entry->result_start	= ac->ac_f_ex.fe_start;
 		__entry->result_group	= ac->ac_f_ex.fe_group;
 		__entry->result_len	= ac->ac_f_ex.fe_len;
+		__entry->found		= ac->ac_found;
+		__entry->flags		= ac->ac_flags;
+		__entry->groups		= ac->ac_groups_scanned;
+		__entry->buddy		= ac->ac_buddy;
+		__entry->tail		= ac->ac_tail;
+		__entry->cr		= ac->ac_criteria;
 	),
 
 	TP_printk("dev %d,%d inode %lu orig %u/%d/%u@%u goal %u/%d/%u@%u "
@@ -1015,17 +1015,17 @@ TRACE_EVENT(ext4_forget,
 	TP_STRUCT__entry(
 		__field(	dev_t,	dev			)
 		__field(	ino_t,	ino			)
-		__field(	__u16,	mode			)
-		__field(	int,	is_metadata		)
 		__field(	__u64,	block			)
+		__field(	int,	is_metadata		)
+		__field(	__u16,	mode			)
 	),
 
 	TP_fast_assign(
 		__entry->dev	= inode->i_sb->s_dev;
 		__entry->ino	= inode->i_ino;
-		__entry->mode	= inode->i_mode;
-		__entry->is_metadata = is_metadata;
 		__entry->block	= block;
+		__entry->is_metadata = is_metadata;
+		__entry->mode	= inode->i_mode;
 	),
 
 	TP_printk("dev %d,%d ino %lu mode 0%o is_metadata %d block %llu",
@@ -1042,19 +1042,18 @@ TRACE_EVENT(ext4_da_update_reserve_space,
 	TP_STRUCT__entry(
 		__field(	dev_t,	dev			)
 		__field(	ino_t,	ino			)
-		__field(	__u16,	mode			)
 		__field(	__u64,	i_blocks		)
 		__field(	int,	used_blocks		)
 		__field(	int,	reserved_data_blocks	)
 		__field(	int,	reserved_meta_blocks	)
 		__field(	int,	allocated_meta_blocks	)
 		__field(	int,	quota_claim		)
+		__field(	__u16,	mode			)
 	),
 
 	TP_fast_assign(
 		__entry->dev	= inode->i_sb->s_dev;
 		__entry->ino	= inode->i_ino;
-		__entry->mode	= inode->i_mode;
 		__entry->i_blocks = inode->i_blocks;
 		__entry->used_blocks = used_blocks;
 		__entry->reserved_data_blocks =
@@ -1064,6 +1063,7 @@ TRACE_EVENT(ext4_da_update_reserve_space,
 		__entry->allocated_meta_blocks =
 				EXT4_I(inode)->i_allocated_meta_blocks;
 		__entry->quota_claim = quota_claim;
+		__entry->mode	= inode->i_mode;
 	),
 
 	TP_printk("dev %d,%d ino %lu mode 0%o i_blocks %llu used_blocks %d "
@@ -1085,21 +1085,21 @@ TRACE_EVENT(ext4_da_reserve_space,
 	TP_STRUCT__entry(
 		__field(	dev_t,	dev			)
 		__field(	ino_t,	ino			)
-		__field(	__u16,  mode			)
 		__field(	__u64,	i_blocks		)
 		__field(	int,	md_needed		)
 		__field(	int,	reserved_data_blocks	)
 		__field(	int,	reserved_meta_blocks	)
+		__field(	__u16,  mode			)
 	),
 
 	TP_fast_assign(
 		__entry->dev	= inode->i_sb->s_dev;
 		__entry->ino	= inode->i_ino;
-		__entry->mode	= inode->i_mode;
 		__entry->i_blocks = inode->i_blocks;
 		__entry->md_needed = md_needed;
 		__entry->reserved_data_blocks = EXT4_I(inode)->i_reserved_data_blocks;
 		__entry->reserved_meta_blocks = EXT4_I(inode)->i_reserved_meta_blocks;
+		__entry->mode	= inode->i_mode;
 	),
 
 	TP_printk("dev %d,%d ino %lu mode 0%o i_blocks %llu md_needed %d "
@@ -1119,23 +1119,23 @@ TRACE_EVENT(ext4_da_release_space,
 	TP_STRUCT__entry(
 		__field(	dev_t,	dev			)
 		__field(	ino_t,	ino			)
-		__field(	__u16,  mode			)
 		__field(	__u64,	i_blocks		)
 		__field(	int,	freed_blocks		)
 		__field(	int,	reserved_data_blocks	)
 		__field(	int,	reserved_meta_blocks	)
 		__field(	int,	allocated_meta_blocks	)
+		__field(	__u16,  mode			)
 	),
 
 	TP_fast_assign(
 		__entry->dev	= inode->i_sb->s_dev;
 		__entry->ino	= inode->i_ino;
-		__entry->mode	= inode->i_mode;
 		__entry->i_blocks = inode->i_blocks;
 		__entry->freed_blocks = freed_blocks;
 		__entry->reserved_data_blocks = EXT4_I(inode)->i_reserved_data_blocks;
 		__entry->reserved_meta_blocks = EXT4_I(inode)->i_reserved_meta_blocks;
 		__entry->allocated_meta_blocks = EXT4_I(inode)->i_allocated_meta_blocks;
+		__entry->mode	= inode->i_mode;
 	),
 
 	TP_printk("dev %d,%d ino %lu mode 0%o i_blocks %llu freed_blocks %d "
@@ -1203,16 +1203,16 @@ TRACE_EVENT(ext4_direct_IO_enter,
 	TP_ARGS(inode, offset, len, rw),
 
 	TP_STRUCT__entry(
-		__field(	ino_t,	ino			)
 		__field(	dev_t,	dev			)
+		__field(	ino_t,	ino			)
 		__field(	loff_t,	pos			)
 		__field(	unsigned long,	len		)
 		__field(	int,	rw			)
 	),
 
 	TP_fast_assign(
-		__entry->ino	= inode->i_ino;
 		__entry->dev	= inode->i_sb->s_dev;
+		__entry->ino	= inode->i_ino;
 		__entry->pos	= offset;
 		__entry->len	= len;
 		__entry->rw	= rw;
@@ -1231,8 +1231,8 @@ TRACE_EVENT(ext4_direct_IO_exit,
 	TP_ARGS(inode, offset, len, rw, ret),
 
 	TP_STRUCT__entry(
-		__field(	ino_t,	ino			)
 		__field(	dev_t,	dev			)
+		__field(	ino_t,	ino			)
 		__field(	loff_t,	pos			)
 		__field(	unsigned long,	len		)
 		__field(	int,	rw			)
@@ -1240,8 +1240,8 @@ TRACE_EVENT(ext4_direct_IO_exit,
 	),
 
 	TP_fast_assign(
-		__entry->ino	= inode->i_ino;
 		__entry->dev	= inode->i_sb->s_dev;
+		__entry->ino	= inode->i_ino;
 		__entry->pos	= offset;
 		__entry->len	= len;
 		__entry->rw	= rw;
@@ -1261,16 +1261,16 @@ TRACE_EVENT(ext4_fallocate_enter,
 	TP_ARGS(inode, offset, len, mode),
 
 	TP_STRUCT__entry(
-		__field(	ino_t,	ino			)
 		__field(	dev_t,	dev			)
+		__field(	ino_t,	ino			)
 		__field(	loff_t,	pos			)
 		__field(	loff_t,	len			)
 		__field(	int,	mode			)
 	),
 
 	TP_fast_assign(
-		__entry->ino	= inode->i_ino;
 		__entry->dev	= inode->i_sb->s_dev;
+		__entry->ino	= inode->i_ino;
 		__entry->pos	= offset;
 		__entry->len	= len;
 		__entry->mode	= mode;
@@ -1289,16 +1289,16 @@ TRACE_EVENT(ext4_fallocate_exit,
 	TP_ARGS(inode, offset, max_blocks, ret),
 
 	TP_STRUCT__entry(
-		__field(	ino_t,	ino			)
 		__field(	dev_t,	dev			)
+		__field(	ino_t,	ino			)
 		__field(	loff_t,	pos			)
 		__field(	unsigned int,	blocks		)
 		__field(	int, 	ret			)
 	),
 
 	TP_fast_assign(
-		__entry->ino	= inode->i_ino;
 		__entry->dev	= inode->i_sb->s_dev;
+		__entry->ino	= inode->i_ino;
 		__entry->pos	= offset;
 		__entry->blocks	= max_blocks;
 		__entry->ret	= ret;
@@ -1317,17 +1317,17 @@ TRACE_EVENT(ext4_unlink_enter,
 	TP_ARGS(parent, dentry),
 
 	TP_STRUCT__entry(
-		__field(	ino_t,	parent			)
+		__field(	dev_t,	dev			)
 		__field(	ino_t,	ino			)
+		__field(	ino_t,	parent			)
 		__field(	loff_t,	size			)
-		__field(	dev_t,	dev			)
 	),
 
 	TP_fast_assign(
-		__entry->parent		= parent->i_ino;
+		__entry->dev		= dentry->d_inode->i_sb->s_dev;
 		__entry->ino		= dentry->d_inode->i_ino;
+		__entry->parent		= parent->i_ino;
 		__entry->size		= dentry->d_inode->i_size;
-		__entry->dev		= dentry->d_inode->i_sb->s_dev;
 	),
 
 	TP_printk("dev %d,%d ino %lu size %lld parent %lu",
@@ -1342,14 +1342,14 @@ TRACE_EVENT(ext4_unlink_exit,
 	TP_ARGS(dentry, ret),
 
 	TP_STRUCT__entry(
-		__field(	ino_t,	ino			)
 		__field(	dev_t,	dev			)
+		__field(	ino_t,	ino			)
 		__field(	int,	ret			)
 	),
 
 	TP_fast_assign(
-		__entry->ino		= dentry->d_inode->i_ino;
 		__entry->dev		= dentry->d_inode->i_sb->s_dev;
+		__entry->ino		= dentry->d_inode->i_ino;
 		__entry->ret		= ret;
 	),
 
@@ -1365,14 +1365,14 @@ DECLARE_EVENT_CLASS(ext4__truncate,
 	TP_ARGS(inode),
 
 	TP_STRUCT__entry(
-		__field(	ino_t,  	ino		)
-		__field(	dev_t,  	dev		)
+		__field(	dev_t,		dev		)
+		__field(	ino_t,		ino		)
 		__field(	__u64,		blocks		)
 	),
 
 	TP_fast_assign(
-		__entry->ino    = inode->i_ino;
 		__entry->dev    = inode->i_sb->s_dev;
+		__entry->ino    = inode->i_ino;
 		__entry->blocks	= inode->i_blocks;
 	),
 
@@ -1403,8 +1403,8 @@ TRACE_EVENT(ext4_ext_convert_to_initialized_enter,
 	TP_ARGS(inode, map, ux),
 
 	TP_STRUCT__entry(
-		__field(	ino_t,		ino	)
 		__field(	dev_t,		dev	)
+		__field(	ino_t,		ino	)
 		__field(	ext4_lblk_t,	m_lblk	)
 		__field(	unsigned,	m_len	)
 		__field(	ext4_lblk_t,	u_lblk	)
@@ -1413,8 +1413,8 @@ TRACE_EVENT(ext4_ext_convert_to_initialized_enter,
 	),
 
 	TP_fast_assign(
-		__entry->ino		= inode->i_ino;
 		__entry->dev		= inode->i_sb->s_dev;
+		__entry->ino		= inode->i_ino;
 		__entry->m_lblk		= map->m_lblk;
 		__entry->m_len		= map->m_len;
 		__entry->u_lblk		= le32_to_cpu(ux->ee_block);
@@ -1441,8 +1441,8 @@ TRACE_EVENT(ext4_ext_convert_to_initialized_fastpath,
 	TP_ARGS(inode, map, ux, ix),
 
 	TP_STRUCT__entry(
-		__field(	ino_t,		ino	)
 		__field(	dev_t,		dev	)
+		__field(	ino_t,		ino	)
 		__field(	ext4_lblk_t,	m_lblk	)
 		__field(	unsigned,	m_len	)
 		__field(	ext4_lblk_t,	u_lblk	)
@@ -1454,8 +1454,8 @@ TRACE_EVENT(ext4_ext_convert_to_initialized_fastpath,
 	),
 
 	TP_fast_assign(
-		__entry->ino		= inode->i_ino;
 		__entry->dev		= inode->i_sb->s_dev;
+		__entry->ino		= inode->i_ino;
 		__entry->m_lblk		= map->m_lblk;
 		__entry->m_len		= map->m_len;
 		__entry->u_lblk		= le32_to_cpu(ux->ee_block);
@@ -1483,16 +1483,16 @@ DECLARE_EVENT_CLASS(ext4__map_blocks_enter,
 	TP_ARGS(inode, lblk, len, flags),
 
 	TP_STRUCT__entry(
-		__field(	ino_t,  	ino		)
-		__field(	dev_t,  	dev		)
+		__field(	dev_t,		dev		)
+		__field(	ino_t,		ino		)
 		__field(	ext4_lblk_t,	lblk		)
 		__field(	unsigned int,	len		)
 		__field(	unsigned int,	flags		)
 	),
 
 	TP_fast_assign(
-		__entry->ino    = inode->i_ino;
 		__entry->dev    = inode->i_sb->s_dev;
+		__entry->ino    = inode->i_ino;
 		__entry->lblk	= lblk;
 		__entry->len	= len;
 		__entry->flags	= flags;
@@ -1525,19 +1525,19 @@ DECLARE_EVENT_CLASS(ext4__map_blocks_exit,
 	TP_ARGS(inode, lblk, pblk, len, ret),
 
 	TP_STRUCT__entry(
-		__field(	ino_t,		ino		)
 		__field(	dev_t,		dev		)
-		__field(	ext4_lblk_t,	lblk		)
+		__field(	ino_t,		ino		)
 		__field(	ext4_fsblk_t,	pblk		)
+		__field(	ext4_lblk_t,	lblk		)
 		__field(	unsigned int,	len		)
 		__field(	int,		ret		)
 	),
 
 	TP_fast_assign(
-		__entry->ino    = inode->i_ino;
 		__entry->dev    = inode->i_sb->s_dev;
-		__entry->lblk	= lblk;
+		__entry->ino    = inode->i_ino;
 		__entry->pblk	= pblk;
+		__entry->lblk	= lblk;
 		__entry->len	= len;
 		__entry->ret	= ret;
 	),
@@ -1569,17 +1569,17 @@ TRACE_EVENT(ext4_ext_load_extent,
 	TP_ARGS(inode, lblk, pblk),
 
 	TP_STRUCT__entry(
-		__field(	ino_t,		ino		)
 		__field(	dev_t,		dev		)
-		__field(	ext4_lblk_t,	lblk		)
+		__field(	ino_t,		ino		)
 		__field(	ext4_fsblk_t,	pblk		)
+		__field(	ext4_lblk_t,	lblk		)
 	),
 
 	TP_fast_assign(
-		__entry->ino    = inode->i_ino;
 		__entry->dev    = inode->i_sb->s_dev;
-		__entry->lblk	= lblk;
+		__entry->ino    = inode->i_ino;
 		__entry->pblk	= pblk;
+		__entry->lblk	= lblk;
 	),
 
 	TP_printk("dev %d,%d ino %lu lblk %u pblk %llu",
@@ -1594,13 +1594,13 @@ TRACE_EVENT(ext4_load_inode,
 	TP_ARGS(inode),
 
 	TP_STRUCT__entry(
-		__field(	ino_t,	ino		)
 		__field(	dev_t,	dev		)
+		__field(	ino_t,	ino		)
 	),
 
 	TP_fast_assign(
-		__entry->ino		= inode->i_ino;
 		__entry->dev		= inode->i_sb->s_dev;
+		__entry->ino		= inode->i_ino;
 	),
 
 	TP_printk("dev %d,%d ino %ld",
@@ -1615,14 +1615,14 @@ TRACE_EVENT(ext4_journal_start,
 
 	TP_STRUCT__entry(
 		__field(	dev_t,	dev			)
-		__field(	  int, 	nblocks			)
 		__field(unsigned long,	ip			)
+		__field(	int,	nblocks			)
 	),
 
 	TP_fast_assign(
 		__entry->dev	 = sb->s_dev;
-		__entry->nblocks = nblocks;
 		__entry->ip	 = IP;
+		__entry->nblocks = nblocks;
 	),
 
 	TP_printk("dev %d,%d nblocks %d caller %pF",
@@ -1686,23 +1686,23 @@ TRACE_EVENT(ext4_ext_handle_uninitialized_extents,
 	TP_ARGS(inode, map, allocated, newblock),
 
 	TP_STRUCT__entry(
-		__field(	ino_t,		ino		)
 		__field(	dev_t,		dev		)
+		__field(	ino_t,		ino		)
+		__field(	int,		flags		)
 		__field(	ext4_lblk_t,	lblk		)
 		__field(	ext4_fsblk_t,	pblk		)
 		__field(	unsigned int,	len		)
-		__field(	int,		flags		)
 		__field(	unsigned int,	allocated	)
 		__field(	ext4_fsblk_t,	newblk		)
 	),
 
 	TP_fast_assign(
-		__entry->ino		= inode->i_ino;
 		__entry->dev		= inode->i_sb->s_dev;
+		__entry->ino		= inode->i_ino;
+		__entry->flags		= map->m_flags;
 		__entry->lblk		= map->m_lblk;
 		__entry->pblk		= map->m_pblk;
 		__entry->len		= map->m_len;
-		__entry->flags		= map->m_flags;
 		__entry->allocated	= allocated;
 		__entry->newblk		= newblock;
 	),
@@ -1724,19 +1724,19 @@ TRACE_EVENT(ext4_get_implied_cluster_alloc_exit,
 
 	TP_STRUCT__entry(
 		__field(	dev_t,		dev	)
+		__field(	unsigned int,	flags	)
 		__field(	ext4_lblk_t,	lblk	)
 		__field(	ext4_fsblk_t,	pblk	)
 		__field(	unsigned int,	len	)
-		__field(	unsigned int,	flags	)
 		__field(	int,		ret	)
 	),
 
 	TP_fast_assign(
 		__entry->dev	= sb->s_dev;
+		__entry->flags	= map->m_flags;
 		__entry->lblk	= map->m_lblk;
 		__entry->pblk	= map->m_pblk;
 		__entry->len	= map->m_len;
-		__entry->flags	= map->m_flags;
 		__entry->ret	= ret;
 	),
 
@@ -1753,16 +1753,16 @@ TRACE_EVENT(ext4_ext_put_in_cache,
 	TP_ARGS(inode, lblk, len, start),
 
 	TP_STRUCT__entry(
-		__field(	ino_t,		ino	)
 		__field(	dev_t,		dev	)
+		__field(	ino_t,		ino	)
 		__field(	ext4_lblk_t,	lblk	)
 		__field(	unsigned int,	len	)
 		__field(	ext4_fsblk_t,	start	)
 	),
 
 	TP_fast_assign(
-		__entry->ino	= inode->i_ino;
 		__entry->dev	= inode->i_sb->s_dev;
+		__entry->ino	= inode->i_ino;
 		__entry->lblk	= lblk;
 		__entry->len	= len;
 		__entry->start	= start;
@@ -1782,15 +1782,15 @@ TRACE_EVENT(ext4_ext_in_cache,
 	TP_ARGS(inode, lblk, ret),
 
 	TP_STRUCT__entry(
-		__field(	ino_t,		ino	)
 		__field(	dev_t,		dev	)
+		__field(	ino_t,		ino	)
 		__field(	ext4_lblk_t,	lblk	)
 		__field(	int,		ret	)
 	),
 
 	TP_fast_assign(
-		__entry->ino	= inode->i_ino;
 		__entry->dev	= inode->i_sb->s_dev;
+		__entry->ino	= inode->i_ino;
 		__entry->lblk	= lblk;
 		__entry->ret	= ret;
 	),
@@ -1810,8 +1810,8 @@ TRACE_EVENT(ext4_find_delalloc_range,
 	TP_ARGS(inode, from, to, reverse, found, found_blk),
 
 	TP_STRUCT__entry(
-		__field(	ino_t,		ino		)
 		__field(	dev_t,		dev		)
+		__field(	ino_t,		ino		)
 		__field(	ext4_lblk_t,	from		)
 		__field(	ext4_lblk_t,	to		)
 		__field(	int,		reverse		)
@@ -1820,8 +1820,8 @@ TRACE_EVENT(ext4_find_delalloc_range,
 	),
 
 	TP_fast_assign(
-		__entry->ino		= inode->i_ino;
 		__entry->dev		= inode->i_sb->s_dev;
+		__entry->ino		= inode->i_ino;
 		__entry->from		= from;
 		__entry->to		= to;
 		__entry->reverse	= reverse;
@@ -1844,15 +1844,15 @@ TRACE_EVENT(ext4_get_reserved_cluster_alloc,
 	TP_ARGS(inode, lblk, len),
 
 	TP_STRUCT__entry(
-		__field(	ino_t,		ino	)
 		__field(	dev_t,		dev	)
+		__field(	ino_t,		ino	)
 		__field(	ext4_lblk_t,	lblk	)
 		__field(	unsigned int,	len	)
 	),
 
 	TP_fast_assign(
-		__entry->ino	= inode->i_ino;
 		__entry->dev	= inode->i_sb->s_dev;
+		__entry->ino	= inode->i_ino;
 		__entry->lblk	= lblk;
 		__entry->len	= len;
 	),
@@ -1871,18 +1871,18 @@ TRACE_EVENT(ext4_ext_show_extent,
 	TP_ARGS(inode, lblk, pblk, len),
 
 	TP_STRUCT__entry(
-		__field(	ino_t,		ino	)
 		__field(	dev_t,		dev	)
-		__field(	ext4_lblk_t,	lblk	)
+		__field(	ino_t,		ino	)
 		__field(	ext4_fsblk_t,	pblk	)
+		__field(	ext4_lblk_t,	lblk	)
 		__field(	unsigned short,	len	)
 	),
 
 	TP_fast_assign(
-		__entry->ino	= inode->i_ino;
 		__entry->dev	= inode->i_sb->s_dev;
-		__entry->lblk	= lblk;
+		__entry->ino	= inode->i_ino;
 		__entry->pblk	= pblk;
+		__entry->lblk	= lblk;
 		__entry->len	= len;
 	),
 
@@ -1902,25 +1902,25 @@ TRACE_EVENT(ext4_remove_blocks,
 	TP_ARGS(inode, ex, from, to, partial_cluster),
 
 	TP_STRUCT__entry(
-		__field(	ino_t,		ino	)
 		__field(	dev_t,		dev	)
-		__field(	ext4_lblk_t,	ee_lblk	)
-		__field(	ext4_fsblk_t,	ee_pblk	)
-		__field(	unsigned short,	ee_len	)
+		__field(	ino_t,		ino	)
 		__field(	ext4_lblk_t,	from	)
 		__field(	ext4_lblk_t,	to	)
 		__field(	ext4_fsblk_t,	partial	)
+		__field(	ext4_fsblk_t,	ee_pblk	)
+		__field(	ext4_lblk_t,	ee_lblk	)
+		__field(	unsigned short,	ee_len	)
 	),
 
 	TP_fast_assign(
-		__entry->ino		= inode->i_ino;
 		__entry->dev		= inode->i_sb->s_dev;
-		__entry->ee_lblk	= cpu_to_le32(ex->ee_block);
-		__entry->ee_pblk	= ext4_ext_pblock(ex);
-		__entry->ee_len		= ext4_ext_get_actual_len(ex);
+		__entry->ino		= inode->i_ino;
 		__entry->from		= from;
 		__entry->to		= to;
 		__entry->partial	= partial_cluster;
+		__entry->ee_pblk	= ext4_ext_pblock(ex);
+		__entry->ee_lblk	= cpu_to_le32(ex->ee_block);
+		__entry->ee_len		= ext4_ext_get_actual_len(ex);
 	),
 
 	TP_printk("dev %d,%d ino %lu extent [%u(%llu), %u]"
@@ -1942,23 +1942,23 @@ TRACE_EVENT(ext4_ext_rm_leaf,
 	TP_ARGS(inode, start, ex, partial_cluster),
 
 	TP_STRUCT__entry(
-		__field(	ino_t,		ino	)
 		__field(	dev_t,		dev	)
+		__field(	ino_t,		ino	)
+		__field(	ext4_fsblk_t,	partial	)
 		__field(	ext4_lblk_t,	start	)
 		__field(	ext4_lblk_t,	ee_lblk	)
 		__field(	ext4_fsblk_t,	ee_pblk	)
 		__field(	short,		ee_len	)
-		__field(	ext4_fsblk_t,	partial	)
 	),
 
 	TP_fast_assign(
-		__entry->ino		= inode->i_ino;
 		__entry->dev		= inode->i_sb->s_dev;
+		__entry->ino		= inode->i_ino;
+		__entry->partial	= partial_cluster;
 		__entry->start		= start;
 		__entry->ee_lblk	= le32_to_cpu(ex->ee_block);
 		__entry->ee_pblk	= ext4_ext_pblock(ex);
 		__entry->ee_len		= ext4_ext_get_actual_len(ex);
-		__entry->partial	= partial_cluster;
 	),
 
 	TP_printk("dev %d,%d ino %lu start_lblk %u last_extent [%u(%llu), %u]"
@@ -1978,14 +1978,14 @@ TRACE_EVENT(ext4_ext_rm_idx,
 	TP_ARGS(inode, pblk),
 
 	TP_STRUCT__entry(
-		__field(	ino_t,		ino	)
 		__field(	dev_t,		dev	)
+		__field(	ino_t,		ino	)
 		__field(	ext4_fsblk_t,	pblk	)
 	),
 
 	TP_fast_assign(
-		__entry->ino	= inode->i_ino;
 		__entry->dev	= inode->i_sb->s_dev;
+		__entry->ino	= inode->i_ino;
 		__entry->pblk	= pblk;
 	),
 
@@ -2001,15 +2001,15 @@ TRACE_EVENT(ext4_ext_remove_space,
 	TP_ARGS(inode, start, depth),
 
 	TP_STRUCT__entry(
-		__field(	ino_t,		ino	)
 		__field(	dev_t,		dev	)
+		__field(	ino_t,		ino	)
 		__field(	ext4_lblk_t,	start	)
 		__field(	int,		depth	)
 	),
 
 	TP_fast_assign(
-		__entry->ino	= inode->i_ino;
 		__entry->dev	= inode->i_sb->s_dev;
+		__entry->ino	= inode->i_ino;
 		__entry->start	= start;
 		__entry->depth	= depth;
 	),
@@ -2028,8 +2028,8 @@ TRACE_EVENT(ext4_ext_remove_space_done,
 	TP_ARGS(inode, start, depth, partial, eh_entries),
 
 	TP_STRUCT__entry(
-		__field(	ino_t,		ino		)
 		__field(	dev_t,		dev		)
+		__field(	ino_t,		ino		)
 		__field(	ext4_lblk_t,	start		)
 		__field(	int,		depth		)
 		__field(	ext4_lblk_t,	partial		)
@@ -2037,8 +2037,8 @@ TRACE_EVENT(ext4_ext_remove_space_done,
 	),
 
 	TP_fast_assign(
-		__entry->ino		= inode->i_ino;
 		__entry->dev		= inode->i_sb->s_dev;
+		__entry->ino		= inode->i_ino;
 		__entry->start		= start;
 		__entry->depth		= depth;
 		__entry->partial	= partial;