[PATCH] change buffer_head.b_size to size_t

Increase the size of the buffer_head b_size field (only) for 64 bit platforms.
Update some old and moldy comments in and around the structure as well.

The b_size increase allows us to perform larger mappings and allocations for
large I/O requests from userspace, which tie in with other changes allowing
the get_block_t() interface to map multiple blocks at once.

Signed-off-by: Nathan Scott <nathans@sgi.com>
Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

3 files changed, 6 insertions, 4 deletions

diff --git a/fs/buffer.c b/fs/buffer.c
index f25f58096428..e7a1461f4387 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -426,8 +426,10 @@ __find_get_block_slow(struct block_device *bdev, sector_t block)
         if (all_mapped) {
                 printk("__find_get_block_slow() failed. "
                         "block=%llu, b_blocknr=%llu\n",
-                        (unsigned long long)block, (unsigned long long)bh->b_blocknr);
-                printk("b_state=0x%08lx, b_size=%u\n", bh->b_state, bh->b_size);
+                        (unsigned long long)block,
+                        (unsigned long long)bh->b_blocknr);
+                printk("b_state=0x%08lx, b_size=%zu\n",
+                        bh->b_state, bh->b_size);
                 printk("device blocksize: %d\n", 1 << bd_inode->i_blkbits);
         }
 out_unlock:
diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index 90641929a437..6a610ae53583 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -377,7 +377,7 @@ int ocfs2_journal_access(struct ocfs2_journal_handle *handle,
         BUG_ON(!bh);
         BUG_ON(!(handle->flags & OCFS2_HANDLE_STARTED));
 
-        mlog_entry("bh->b_blocknr=%llu, type=%d (\"%s\"), bh->b_size = %hu\n",
+        mlog_entry("bh->b_blocknr=%llu, type=%d (\"%s\"), bh->b_size = %zu\n",
                    (unsigned long long)bh->b_blocknr, type,
                    (type == OCFS2_JOURNAL_ACCESS_CREATE) ?
                    "OCFS2_JOURNAL_ACCESS_CREATE" :
diff --git a/fs/reiserfs/prints.c b/fs/reiserfs/prints.c
index 78b40621b88b..27bd3a1df2ad 100644
--- a/fs/reiserfs/prints.c
+++ b/fs/reiserfs/prints.c
@@ -143,7 +143,7 @@ static void sprintf_buffer_head(char *buf, struct buffer_head *bh)
         char b[BDEVNAME_SIZE];
 
         sprintf(buf,
-                "dev %s, size %d, blocknr %llu, count %d, state 0x%lx, page %p, (%s, %s, %s)",
+                "dev %s, size %zd, blocknr %llu, count %d, state 0x%lx, page %p, (%s, %s, %s)",
                 bdevname(bh->b_bdev, b), bh->b_size,
                 (unsigned long long)bh->b_blocknr, atomic_read(&(bh->b_count)),
                 bh->b_state, bh->b_page,