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-rw-r--r--drivers/md/bitmap.c38
1 files changed, 19 insertions, 19 deletions
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index 0dc6546b77a8..69a6f256ce35 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -868,7 +868,8 @@ static void bitmap_file_kick(struct bitmap *bitmap)
868 868
869enum bitmap_page_attr { 869enum bitmap_page_attr {
870 BITMAP_PAGE_DIRTY = 0, /* there are set bits that need to be synced */ 870 BITMAP_PAGE_DIRTY = 0, /* there are set bits that need to be synced */
871 BITMAP_PAGE_CLEAN = 1, /* there are bits that might need to be cleared */ 871 BITMAP_PAGE_PENDING = 1, /* there are bits that are being cleaned.
872 * i.e. counter is 1 or 2. */
872 BITMAP_PAGE_NEEDWRITE = 2, /* there are cleared bits that need to be synced */ 873 BITMAP_PAGE_NEEDWRITE = 2, /* there are cleared bits that need to be synced */
873}; 874};
874 875
@@ -1111,7 +1112,6 @@ static int bitmap_init_from_disk(struct bitmap *bitmap, sector_t start)
1111 (sector_t)i << CHUNK_BLOCK_SHIFT(bitmap), 1112 (sector_t)i << CHUNK_BLOCK_SHIFT(bitmap),
1112 needed); 1113 needed);
1113 bit_cnt++; 1114 bit_cnt++;
1114 set_page_attr(bitmap, page, BITMAP_PAGE_CLEAN);
1115 } 1115 }
1116 } 1116 }
1117 1117
@@ -1204,7 +1204,7 @@ void bitmap_daemon_work(mddev_t *mddev)
1204 1204
1205 if (page != lastpage) { 1205 if (page != lastpage) {
1206 /* skip this page unless it's marked as needing cleaning */ 1206 /* skip this page unless it's marked as needing cleaning */
1207 if (!test_page_attr(bitmap, page, BITMAP_PAGE_CLEAN)) { 1207 if (!test_page_attr(bitmap, page, BITMAP_PAGE_PENDING)) {
1208 int need_write = test_page_attr(bitmap, page, 1208 int need_write = test_page_attr(bitmap, page,
1209 BITMAP_PAGE_NEEDWRITE); 1209 BITMAP_PAGE_NEEDWRITE);
1210 if (need_write) 1210 if (need_write)
@@ -1249,19 +1249,17 @@ void bitmap_daemon_work(mddev_t *mddev)
1249 } 1249 }
1250 spin_lock_irqsave(&bitmap->lock, flags); 1250 spin_lock_irqsave(&bitmap->lock, flags);
1251 if (!bitmap->need_sync) 1251 if (!bitmap->need_sync)
1252 clear_page_attr(bitmap, page, BITMAP_PAGE_CLEAN); 1252 clear_page_attr(bitmap, page, BITMAP_PAGE_PENDING);
1253 } 1253 }
1254 bmc = bitmap_get_counter(bitmap, 1254 bmc = bitmap_get_counter(bitmap,
1255 (sector_t)j << CHUNK_BLOCK_SHIFT(bitmap), 1255 (sector_t)j << CHUNK_BLOCK_SHIFT(bitmap),
1256 &blocks, 0); 1256 &blocks, 0);
1257 if (bmc) { 1257 if (!bmc)
1258 if (*bmc) 1258 j |= PAGE_COUNTER_MASK;
1259 bitmap->allclean = 0; 1259 else if (*bmc) {
1260 bitmap->allclean = 0;
1260 1261
1261 if (*bmc == 2) { 1262 if (*bmc == 1 && !bitmap->need_sync) {
1262 *bmc = 1; /* maybe clear the bit next time */
1263 set_page_attr(bitmap, page, BITMAP_PAGE_CLEAN);
1264 } else if (*bmc == 1 && !bitmap->need_sync) {
1265 /* we can clear the bit */ 1263 /* we can clear the bit */
1266 *bmc = 0; 1264 *bmc = 0;
1267 bitmap_count_page(bitmap, 1265 bitmap_count_page(bitmap,
@@ -1275,13 +1273,15 @@ void bitmap_daemon_work(mddev_t *mddev)
1275 paddr); 1273 paddr);
1276 else 1274 else
1277 __clear_bit_le( 1275 __clear_bit_le(
1278 file_page_offset(bitmap, 1276 file_page_offset(bitmap,
1279 j), 1277 j),
1280 paddr); 1278 paddr);
1281 kunmap_atomic(paddr, KM_USER0); 1279 kunmap_atomic(paddr, KM_USER0);
1280 } else if (*bmc <= 2) {
1281 *bmc = 1; /* maybe clear the bit next time */
1282 set_page_attr(bitmap, page, BITMAP_PAGE_PENDING);
1282 } 1283 }
1283 } else 1284 }
1284 j |= PAGE_COUNTER_MASK;
1285 } 1285 }
1286 spin_unlock_irqrestore(&bitmap->lock, flags); 1286 spin_unlock_irqrestore(&bitmap->lock, flags);
1287 1287
@@ -1458,7 +1458,7 @@ void bitmap_endwrite(struct bitmap *bitmap, sector_t offset, unsigned long secto
1458 filemap_get_page( 1458 filemap_get_page(
1459 bitmap, 1459 bitmap,
1460 offset >> CHUNK_BLOCK_SHIFT(bitmap)), 1460 offset >> CHUNK_BLOCK_SHIFT(bitmap)),
1461 BITMAP_PAGE_CLEAN); 1461 BITMAP_PAGE_PENDING);
1462 1462
1463 spin_unlock_irqrestore(&bitmap->lock, flags); 1463 spin_unlock_irqrestore(&bitmap->lock, flags);
1464 offset += blocks; 1464 offset += blocks;
@@ -1546,7 +1546,7 @@ void bitmap_end_sync(struct bitmap *bitmap, sector_t offset, sector_t *blocks, i
1546 if (*bmc <= 2) 1546 if (*bmc <= 2)
1547 set_page_attr(bitmap, 1547 set_page_attr(bitmap,
1548 filemap_get_page(bitmap, offset >> CHUNK_BLOCK_SHIFT(bitmap)), 1548 filemap_get_page(bitmap, offset >> CHUNK_BLOCK_SHIFT(bitmap)),
1549 BITMAP_PAGE_CLEAN); 1549 BITMAP_PAGE_PENDING);
1550 } 1550 }
1551 } 1551 }
1552 unlock: 1552 unlock:
@@ -1622,7 +1622,7 @@ static void bitmap_set_memory_bits(struct bitmap *bitmap, sector_t offset, int n
1622 *bmc = 1 | (needed ? NEEDED_MASK : 0); 1622 *bmc = 1 | (needed ? NEEDED_MASK : 0);
1623 bitmap_count_page(bitmap, offset, 1); 1623 bitmap_count_page(bitmap, offset, 1);
1624 page = filemap_get_page(bitmap, offset >> CHUNK_BLOCK_SHIFT(bitmap)); 1624 page = filemap_get_page(bitmap, offset >> CHUNK_BLOCK_SHIFT(bitmap));
1625 set_page_attr(bitmap, page, BITMAP_PAGE_CLEAN); 1625 set_page_attr(bitmap, page, BITMAP_PAGE_PENDING);
1626 } 1626 }
1627 spin_unlock_irq(&bitmap->lock); 1627 spin_unlock_irq(&bitmap->lock);
1628 bitmap->allclean = 0; 1628 bitmap->allclean = 0;