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udf: move calculating of nr_groups into helper function 

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Cc: Ben Fennema <bfennema@falcon.csc.calpoly.edu>
Acked-by: Jan Kara <jack@suse.cz>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Marcin Slusarz 2008-02-08 04:20:34 -08:00 committed by Linus Torvalds
parent 66e1da3f47
commit 883cb9d184
3 changed files with 13 additions and 9 deletions
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4
fs/udf/balloc.c
View File

@ -231,9 +231,7 @@ static int udf_bitmap_prealloc_blocks(struct super_block *sb,
block_count = part_len - first_block;
repeat:
nr_groups = (sbi->s_partmaps[partition].s_partition_len +
(sizeof(struct spaceBitmapDesc) << 3) +
(sb->s_blocksize * 8) - 1) / (sb->s_blocksize * 8);
nr_groups = udf_compute_nr_groups(sb, partition);
block = first_block + (sizeof(struct spaceBitmapDesc) << 3);
block_group = block >> (sb->s_blocksize_bits + 3);
group_start = block_group ? 0 : sizeof(struct spaceBitmapDesc);

16
fs/udf/super.c
View File

@ -937,18 +937,22 @@ static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
root->logicalBlockNum, root->partitionReferenceNum);
}
int udf_compute_nr_groups(struct super_block *sb, u32 partition)
{
struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
return (map->s_partition_len +
(sizeof(struct spaceBitmapDesc) << 3) +
(sb->s_blocksize * 8) - 1) /
(sb->s_blocksize * 8);
}
static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
{
struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[index];
struct udf_bitmap *bitmap;
int nr_groups;
int size;
/* TODO: move calculating of nr_groups into helper function */
nr_groups = (map->s_partition_len +
(sizeof(struct spaceBitmapDesc) << 3) +
(sb->s_blocksize * 8) - 1) /
(sb->s_blocksize * 8);
nr_groups = udf_compute_nr_groups(sb, index);
size = sizeof(struct udf_bitmap) +
(sizeof(struct buffer_head *) * nr_groups);

2
fs/udf/udf_sb.h
View File

@ -43,6 +43,8 @@ static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi);
int udf_compute_nr_groups(struct super_block *sb, u32 partition);
#define UDF_QUERY_FLAG(X,Y) ( UDF_SB(X)->s_flags & ( 1 << (Y) ) )
#define UDF_SET_FLAG(X,Y) ( UDF_SB(X)->s_flags |= ( 1 << (Y) ) )
#define UDF_CLEAR_FLAG(X,Y) ( UDF_SB(X)->s_flags &= ~( 1 << (Y) ) )