ocfs2: Track local alloc bits internally

Do this instead of tracking absolute local alloc size. This avoids
needless re-calculatiion of bits from bytes in localalloc.c. Additionally,
the value is now in a more natural unit for internal file system bitmap
work.

Signed-off-by: Mark Fasheh <mfasheh@suse.com>

1 files changed, 9 insertions, 1 deletions

diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index 7f625f2b111..43dd42e313a 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -252,7 +252,7 @@ struct ocfs2_super
         struct ocfs2_journal *journal;
         unsigned long osb_commit_interval;
 
-        int local_alloc_size;
+        unsigned int local_alloc_bits;
         enum ocfs2_local_alloc_state local_alloc_state;
         struct buffer_head *local_alloc_bh;
         u64 la_last_gd;
@@ -554,6 +554,14 @@ static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb)
         return pages_per_cluster;
 }
 
+static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb,
+                                                       unsigned int megs)
+{
+        BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576);
+
+        return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits);
+}
+
 static inline void ocfs2_init_inode_steal_slot(struct ocfs2_super *osb)
 {
         spin_lock(&osb->osb_lock);