target: pack struct se_task more tightly

Rearrange the fields in se_task to avoid holes.  Also increase the
flags field to 16 bits as we have the space for it, and this makes
adding new flags safer.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index 45291b2..a6c2348 100644 (file)
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -402,24 +402,24 @@ struct se_queue_obj {
 } ____cacheline_aligned;
 
 struct se_task {
-       unsigned char   task_sense;
-       struct scatterlist *task_sg;
-       u32             task_sg_nents;
-       struct scatterlist *task_sg_bidi;
-       u8              task_scsi_status;
-       u8              task_flags;
-       int             task_error_status;
        unsigned long long      task_lba;
-       u32             task_sectors;
-       u32             task_size;
+       u32                     task_sectors;
+       u32                     task_size;
+       struct se_cmd           *task_se_cmd;
+       struct scatterlist      *task_sg;
+       struct scatterlist      *task_sg_bidi;
+       u32                     task_sg_nents;
+       u16                     task_flags;
+       u8                      task_sense;
+       u8                      task_scsi_status;
+       int                     task_error_status;
        enum dma_data_direction task_data_direction;
-       struct se_cmd *task_se_cmd;
-       struct completion       task_stop_comp;
-       atomic_t        task_state_active;
+       atomic_t                task_state_active;
        struct timer_list       task_timer;
-       struct list_head t_list;
-       struct list_head t_execute_list;
-       struct list_head t_state_list;
+       struct list_head        t_list;
+       struct list_head        t_execute_list;
+       struct list_head        t_state_list;
+       struct completion       task_stop_comp;
 } ____cacheline_aligned;
 
 struct se_cmd {