1 files changed, 9 insertions, 9 deletions

diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index c6dc1183f542..69d270f6602c 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -29,7 +29,7 @@
 #include "inode-map.h"
 #include "volumes.h"
 
-#define BITS_PER_BITMAP         (PAGE_SIZE * 8)
+#define BITS_PER_BITMAP         (PAGE_SIZE * 8UL)
 #define MAX_CACHE_BYTES_PER_GIG SZ_32K
 
 struct btrfs_trim_range {
@@ -1415,11 +1415,11 @@ static inline u64 offset_to_bitmap(struct btrfs_free_space_ctl *ctl,
                                    u64 offset)
 {
         u64 bitmap_start;
-        u32 bytes_per_bitmap;
+        u64 bytes_per_bitmap;
 
         bytes_per_bitmap = BITS_PER_BITMAP * ctl->unit;
         bitmap_start = offset - ctl->start;
-        bitmap_start = div_u64(bitmap_start, bytes_per_bitmap);
+        bitmap_start = div64_u64(bitmap_start, bytes_per_bitmap);
         bitmap_start *= bytes_per_bitmap;
         bitmap_start += ctl->start;
 
@@ -1638,10 +1638,10 @@ static void recalculate_thresholds(struct btrfs_free_space_ctl *ctl)
         u64 bitmap_bytes;
         u64 extent_bytes;
         u64 size = block_group->key.offset;
-        u32 bytes_per_bg = BITS_PER_BITMAP * ctl->unit;
-        u32 max_bitmaps = div_u64(size + bytes_per_bg - 1, bytes_per_bg);
+        u64 bytes_per_bg = BITS_PER_BITMAP * ctl->unit;
+        u64 max_bitmaps = div64_u64(size + bytes_per_bg - 1, bytes_per_bg);
 
-        max_bitmaps = max_t(u32, max_bitmaps, 1);
+        max_bitmaps = max_t(u64, max_bitmaps, 1);
 
         ASSERT(ctl->total_bitmaps <= max_bitmaps);
 
@@ -1660,7 +1660,7 @@ static void recalculate_thresholds(struct btrfs_free_space_ctl *ctl)
          * sure we don't go over our overall goal of MAX_CACHE_BYTES_PER_GIG as
          * we add more bitmaps.
          */
-        bitmap_bytes = (ctl->total_bitmaps + 1) * PAGE_SIZE;
+        bitmap_bytes = (ctl->total_bitmaps + 1) * ctl->unit;
 
         if (bitmap_bytes >= max_bytes) {
                 ctl->extents_thresh = 0;
@@ -3662,7 +3662,7 @@ have_info:
                         if (tmp->offset + tmp->bytes < offset)
                                 break;
                         if (offset + bytes < tmp->offset) {
-                                n = rb_prev(&info->offset_index);
+                                n = rb_prev(&tmp->offset_index);
                                 continue;
                         }
                         info = tmp;
@@ -3676,7 +3676,7 @@ have_info:
                         if (offset + bytes < tmp->offset)
                                 break;
                         if (tmp->offset + tmp->bytes < offset) {
-                                n = rb_next(&info->offset_index);
+                                n = rb_next(&tmp->offset_index);
                                 continue;
                         }
                         info = tmp;