UBIFS: save 128KiB or more RAM

When debugging is enabled, we allocate a buffer of PEB size for
various debugging purposes. However, now all users of this buffer
are gone and we can safely remove it and save 128KiB or more RAM.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c
index c2e5c08..01c2b02 100644 (file)
--- a/fs/ubifs/debug.c
+++ b/fs/ubifs/debug.c
@@ -2701,16 +2701,8 @@ int ubifs_debugging_init(struct ubifs_info *c)
        if (!c->dbg)
                return -ENOMEM;
 
-       c->dbg->buf = vmalloc(c->leb_size);
-       if (!c->dbg->buf)
-               goto out;
-
        failure_mode_init(c);
        return 0;
-
-out:
-       kfree(c->dbg);
-       return -ENOMEM;
 }
 
 /**
@@ -2720,7 +2712,6 @@ out:
 void ubifs_debugging_exit(struct ubifs_info *c)
 {
        failure_mode_exit(c);
-       vfree(c->dbg->buf);
        kfree(c->dbg);
 }
 

diff --git a/fs/ubifs/debug.h b/fs/ubifs/debug.h
index 10190c1..4efbba7 100644 (file)
--- a/fs/ubifs/debug.h
+++ b/fs/ubifs/debug.h
@@ -27,7 +27,6 @@
 
 /**
  * ubifs_debug_info - per-FS debugging information.
- * @buf: a buffer of LEB size, used for various purposes
  * @old_zroot: old index root - used by 'dbg_check_old_index()'
  * @old_zroot_level: old index root level - used by 'dbg_check_old_index()'
  * @old_zroot_sqnum: old index root sqnum - used by 'dbg_check_old_index()'
@@ -54,7 +53,6 @@
  * dfs_dump_tnc: "dump TNC" debugfs knob
  */
 struct ubifs_debug_info {
-       void *buf;
        struct ubifs_zbranch old_zroot;
        int old_zroot_level;
        unsigned long long old_zroot_sqnum;