[PATCH] inode-diet: Eliminate i_blksize from the inode structure

This eliminates the i_blksize field from struct inode.  Filesystems that want
to provide a per-inode st_blksize can do so by providing their own getattr
routine instead of using the generic_fillattr() function.

Note that some filesystems were providing pretty much random (and incorrect)
values for i_blksize.

[bunk@stusta.de: cleanup]
[akpm@osdl.org: generic_fillattr() fix]
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 7b3b94ddddcc..c774121684d7 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -662,7 +662,8 @@ static void do_loop_switch(struct loop_device *lo, struct switch_request *p)
 
         mapping_set_gfp_mask(old_file->f_mapping, lo->old_gfp_mask);
         lo->lo_backing_file = file;
-        lo->lo_blocksize = mapping->host->i_blksize;
+        lo->lo_blocksize = S_ISBLK(mapping->host->i_mode) ?
+                mapping->host->i_bdev->bd_block_size : PAGE_SIZE;
         lo->old_gfp_mask = mapping_gfp_mask(mapping);
         mapping_set_gfp_mask(mapping, lo->old_gfp_mask & ~(__GFP_IO|__GFP_FS));
         complete(&p->wait);
@@ -794,7 +795,9 @@ static int loop_set_fd(struct loop_device *lo, struct file *lo_file,
                 if (!(lo_flags & LO_FLAGS_USE_AOPS) && !file->f_op->write)
                         lo_flags |= LO_FLAGS_READ_ONLY;
 
-                lo_blocksize = inode->i_blksize;
+                lo_blocksize = S_ISBLK(inode->i_mode) ?
+                        inode->i_bdev->bd_block_size : PAGE_SIZE;
+
                 error = 0;
         } else {
                 goto out_putf;