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| author |   Mikulas Patocka <mpatocka@redhat.com> | 2018-03-26 20:29:44 +0200 |
|---|---|---|
| committer |   Mike Snitzer <snitzer@redhat.com> | 2018-04-03 15:04:26 -0400 |
| commit | 03b02939593700caf391dc02b86b23b0d7aac2e5 (patch) | |
| tree | 424b671b5221767dedbdd6d6caa2426afb380e9f /drivers/md/dm-bufio.c | |
| parent | dm bufio: relax alignment constraint on slab cache (diff) | |
| download | linux-dev-03b02939593700caf391dc02b86b23b0d7aac2e5.tar.xz linux-dev-03b02939593700caf391dc02b86b23b0d7aac2e5.zip | |
dm bufio: reorder fields in dm_buffer structure
Reorder fields in dm_buffer structure to improve packing and reduce
structure size. The compiler allocates 32-bit integer for field 'enum
data_mode', so change it to unsigned char.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-bufio.c')
| -rw-r--r-- | drivers/md/dm-bufio.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/md/dm-bufio.c b/drivers/md/dm-bufio.c index c57aefb3c643..776075ccf775 100644 --- a/drivers/md/dm-bufio.c +++ b/drivers/md/dm-bufio.c @@ -147,11 +147,11 @@ struct dm_buffer { struct list_head lru_list; sector_t block; void *data; - enum data_mode data_mode; + unsigned char data_mode; /* DATA_MODE_* */ unsigned char list_mode; /* LIST_* */ - unsigned hold_count; blk_status_t read_error; blk_status_t write_error; + unsigned hold_count; unsigned long state; unsigned long last_accessed; unsigned dirty_start; @@ -303,7 +303,7 @@ static void __remove(struct dm_bufio_client *c, struct dm_buffer *b) /*----------------------------------------------------------------*/ -static void adjust_total_allocated(enum data_mode data_mode, long diff) +static void adjust_total_allocated(unsigned char data_mode, long diff) { static unsigned long * const class_ptr[DATA_MODE_LIMIT] = { &dm_bufio_allocated_kmem_cache, @@ -368,7 +368,7 @@ static void __cache_size_refresh(void) * space. */ static void *alloc_buffer_data(struct dm_bufio_client *c, gfp_t gfp_mask, - enum data_mode *data_mode) + unsigned char *data_mode) { if (unlikely(c->slab_cache != NULL)) { *data_mode = DATA_MODE_SLAB; @@ -408,7 +408,7 @@ static void *alloc_buffer_data(struct dm_bufio_client *c, gfp_t gfp_mask, * Free buffer's data. */ static void free_buffer_data(struct dm_bufio_client *c, - void *data, enum data_mode data_mode) + void *data, unsigned char data_mode) { switch (data_mode) { case DATA_MODE_SLAB: |