ext4: Fix 64-bit block type problem on 32-bit platforms

The function ext4_mb_free_blocks() was using an "unsigned long" to
pass a block number; this will cause 64-bit block numbers to get
truncated on x86 and other 32-bit platforms.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 8d98070b48fb..519a0a686d94 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -4689,7 +4689,7 @@ ext4_mb_free_metadata(handle_t *handle, struct ext4_buddy *e4b,
  * Main entry point into mballoc to free blocks
  */
 void ext4_mb_free_blocks(handle_t *handle, struct inode *inode,
-                        unsigned long block, unsigned long count,
+                        ext4_fsblk_t block, unsigned long count,
                         int metadata, unsigned long *freed)
 {
         struct buffer_head *bitmap_bh = NULL;
@@ -4715,11 +4715,11 @@ void ext4_mb_free_blocks(handle_t *handle, struct inode *inode,
             block + count > ext4_blocks_count(es)) {
                 ext4_error(sb, __func__,
                             "Freeing blocks not in datazone - "
-                            "block = %lu, count = %lu", block, count);
+                            "block = %llu, count = %lu", block, count);
                 goto error_return;
         }
 
-        ext4_debug("freeing block %lu\n", block);
+        ext4_debug("freeing block %llu\n", block);
         trace_ext4_free_blocks(inode, block, count, metadata);
 
         ac = kmem_cache_alloc(ext4_ac_cachep, GFP_NOFS);
@@ -4761,7 +4761,7 @@ do_more:
 
                 ext4_error(sb, __func__,
                            "Freeing blocks in system zone - "
-                           "Block = %lu, count = %lu", block, count);
+                           "Block = %llu, count = %lu", block, count);
                 /* err = 0. ext4_std_error should be a no op */
                 goto error_return;
         }