md/bitmap: remove unused fields from struct bitmap

Get rid of ->syncchunk and ->counter_bits since they're never used.

Also discard COUNTER_BYTE_RATIO which is unused.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>

diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index 663e605..574b09a 100644 (file)
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -1837,9 +1837,6 @@ int bitmap_create(mddev_t *mddev)
        bitmap->chunks = chunks;
        bitmap->pages = pages;
        bitmap->missing_pages = pages;
-       bitmap->counter_bits = COUNTER_BITS;
-
-       bitmap->syncchunk = ~0UL;
 
 #ifdef INJECT_FATAL_FAULT_1
        bitmap->bp = NULL;

diff --git a/drivers/md/bitmap.h b/drivers/md/bitmap.h
index d0aeaf4..b2a127e 100644 (file)
--- a/drivers/md/bitmap.h
+++ b/drivers/md/bitmap.h
@@ -85,7 +85,6 @@
 typedef __u16 bitmap_counter_t;
 #define COUNTER_BITS 16
 #define COUNTER_BIT_SHIFT 4
-#define COUNTER_BYTE_RATIO (COUNTER_BITS / 8)
 #define COUNTER_BYTE_SHIFT (COUNTER_BIT_SHIFT - 3)
 
 #define NEEDED_MASK ((bitmap_counter_t) (1 << (COUNTER_BITS - 1)))
@@ -196,19 +195,10 @@ struct bitmap {
 
        mddev_t *mddev; /* the md device that the bitmap is for */
 
-       int counter_bits; /* how many bits per block counter */
-
        /* bitmap chunksize -- how much data does each bit represent? */
        unsigned long chunkshift; /* chunksize = 2^chunkshift (for bitops) */
        unsigned long chunks; /* total number of data chunks for the array */
 
-       /* We hold a count on the chunk currently being synced, and drop
-        * it when the last block is started.  If the resync is aborted
-        * midway, we need to be able to drop that count, so we remember
-        * the counted chunk..
-        */
-       unsigned long syncchunk;
-
        __u64   events_cleared;
        int need_sync;