core: fs: get rid of the prev_extent member

The prev_extent member was only ever used transiently; instead pass
the new lstart in as an argument and leave the previous value of
next_extent unmolested and thus can be used in-place.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/core/include/fs.h b/core/include/fs.h
index ef7eb8b5..4aca7fc4 100644
--- a/core/include/fs.h
+++ b/core/include/fs.h
@@ -69,7 +69,7 @@ struct fs_ops {
     /* the _dir_ stuff */
     struct dirent * (*readdir)(struct file *);
 
-    void     (*next_extent)(struct inode *);
+    int      (*next_extent)(struct inode *, uint32_t);
 };
 
 enum inode_mode {I_FILE, I_DIR, I_SYMLINK};
@@ -106,7 +106,7 @@ struct inode {
     uint32_t     dtime;  /* Delete time */
     uint32_t     flags;
     uint32_t     file_acl;
-    struct extent this_extent, prev_extent, next_extent;
+    struct extent this_extent, next_extent;
     char         pvt[0]; /* Private filesystem data */
 };