From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: include/linux/backing-dev-defs.h: shrink struct backing_dev_info
Move the 4-byte `capabilities' field next to other 4-byte things. Shrinks
sizeof(backing_dev_info) by 8 bytes on x86_64.
Reviewed-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/backing-dev-defs.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN include/linux/backing-dev-defs.h~include-linux-backing-dev-defsh-shrink-struct-backing_dev_info include/linux/backing-dev-defs.h
--- a/include/linux/backing-dev-defs.h~include-linux-backing-dev-defsh-shrink-struct-backing_dev_info
+++ a/include/linux/backing-dev-defs.h
@@ -137,12 +137,12 @@ struct backing_dev_info {
struct list_head bdi_list;
unsigned long ra_pages; /* max readahead in PAGE_SIZE units */
unsigned long io_pages; /* max allowed IO size */
- unsigned int capabilities; /* Device capabilities */
congested_fn *congested_fn; /* Function pointer if device is md/dm */
void *congested_data; /* Pointer to aux data for congested func */
char *name;
+ unsigned int capabilities; /* Device capabilities */
unsigned int min_ratio;
unsigned int max_ratio, max_prop_frac;
_
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