nilfs2: unfold nilfs_palloc_block_get_bitmap function

This expands a trivial address calculation in the function into its
every callsite. This expansion improves readability of the callers.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

diff --git a/fs/nilfs2/alloc.c b/fs/nilfs2/alloc.c
index d69e6ae59251f44f31f852d69b5ade0effea8805..7e2b3ce57aa9b690e394b8b5f51ac60695633d0f 100644 (file)
--- a/fs/nilfs2/alloc.c
+++ b/fs/nilfs2/alloc.c
@@ -176,13 +176,6 @@ nilfs_palloc_block_get_group_desc(const struct inode *inode,
                group % nilfs_palloc_groups_per_desc_block(inode);
 }
 
-static unsigned char *
-nilfs_palloc_block_get_bitmap(const struct inode *inode,
-                             const struct buffer_head *bh, void *kaddr)
-{
-       return (unsigned char *)(kaddr + bh_offset(bh));
-}
-
 void *nilfs_palloc_block_get_entry(const struct inode *inode, __u64 nr,
                                   const struct buffer_head *bh, void *kaddr)
 {
@@ -289,8 +282,7 @@ int nilfs_palloc_prepare_alloc_entry(struct inode *inode,
                                if (ret < 0)
                                        goto out_desc;
                                bitmap_kaddr = kmap(bitmap_bh->b_page);
-                               bitmap = nilfs_palloc_block_get_bitmap(
-                                       inode, bitmap_bh, bitmap_kaddr);
+                               bitmap = bitmap_kaddr + bh_offset(bitmap_bh);
                                pos = nilfs_palloc_find_available_slot(
                                        inode, group, group_offset, bitmap,
                                        entries_per_group);
@@ -351,8 +343,7 @@ void nilfs_palloc_commit_free_entry(struct inode *inode,
        desc = nilfs_palloc_block_get_group_desc(inode, group,
                                                 req->pr_desc_bh, desc_kaddr);
        bitmap_kaddr = kmap(req->pr_bitmap_bh->b_page);
-       bitmap = nilfs_palloc_block_get_bitmap(inode, req->pr_bitmap_bh,
-                                              bitmap_kaddr);
+       bitmap = bitmap_kaddr + bh_offset(req->pr_bitmap_bh);
 
        if (!nilfs_clear_bit_atomic(nilfs_mdt_bgl_lock(inode, group),
                                    group_offset, bitmap))
@@ -385,8 +376,7 @@ void nilfs_palloc_abort_alloc_entry(struct inode *inode,
        desc = nilfs_palloc_block_get_group_desc(inode, group,
                                                 req->pr_desc_bh, desc_kaddr);
        bitmap_kaddr = kmap(req->pr_bitmap_bh->b_page);
-       bitmap = nilfs_palloc_block_get_bitmap(inode, req->pr_bitmap_bh,
-                                              bitmap_kaddr);
+       bitmap = bitmap_kaddr + bh_offset(req->pr_bitmap_bh);
        if (!nilfs_clear_bit_atomic(nilfs_mdt_bgl_lock(inode, group),
                                    group_offset, bitmap))
                printk(KERN_WARNING "%s: entry numer %llu already freed\n",
@@ -472,8 +462,7 @@ int nilfs_palloc_freev(struct inode *inode, __u64 *entry_nrs, size_t nitems)
                desc = nilfs_palloc_block_get_group_desc(
                        inode, group, desc_bh, desc_kaddr);
                bitmap_kaddr = kmap(bitmap_bh->b_page);
-               bitmap = nilfs_palloc_block_get_bitmap(
-                       inode, bitmap_bh, bitmap_kaddr);
+               bitmap = bitmap_kaddr + bh_offset(bitmap_bh);
                for (j = i, n = 0;
                     (j < nitems) && nilfs_palloc_group_is_in(inode, group,
                                                              entry_nrs[j]);