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ext4: pass a char * to ext4_count_free() instead of a buffer_head ptr 

Make it possible for ext4_count_free to operate on buffers and not
just data in buffer_heads.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@kernel.org
This commit is contained in:
Theodore Ts'o 2012-06-30 19:14:57 -04:00
parent f4e95b3316
commit f6fb99cadc
4 changed files with 8 additions and 8 deletions
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3
fs/ext4/balloc.c
View File

@ -609,7 +609,8 @@ ext4_fsblk_t ext4_count_free_clusters(struct super_block *sb)
if (bitmap_bh == NULL)
continue;
x = ext4_count_free(bitmap_bh, sb->s_blocksize);
x = ext4_count_free(bitmap_bh->b_data,
EXT4_BLOCKS_PER_GROUP(sb) / 8);
printk(KERN_DEBUG "group %u: stored = %d, counted = %u\n",
i, ext4_free_group_clusters(sb, gdp), x);
bitmap_count += x;

8
fs/ext4/bitmap.c
View File

@ -15,15 +15,13 @@
static const int nibblemap[] = {4, 3, 3, 2, 3, 2, 2, 1, 3, 2, 2, 1, 2, 1, 1, 0};
unsigned int ext4_count_free(struct buffer_head *map, unsigned int numchars)
unsigned int ext4_count_free(char *bitmap, unsigned int numchars)
{
unsigned int i, sum = 0;
if (!map)
return 0;
for (i = 0; i < numchars; i++)
sum += nibblemap[map->b_data[i] & 0xf] +
nibblemap[(map->b_data[i] >> 4) & 0xf];
sum += nibblemap[bitmap[i] & 0xf] +
nibblemap[(bitmap[i] >> 4) & 0xf];
return sum;
}

2
fs/ext4/ext4.h
View File

@ -1852,7 +1852,7 @@ struct mmpd_data {
# define NORET_AND noreturn,
/* bitmap.c */
extern unsigned int ext4_count_free(struct buffer_head *, unsigned);
extern unsigned int ext4_count_free(char *bitmap, unsigned numchars);
void ext4_inode_bitmap_csum_set(struct super_block *sb, ext4_group_t group,
struct ext4_group_desc *gdp,
struct buffer_head *bh, int sz);

3
fs/ext4/ialloc.c
View File

@ -1054,7 +1054,8 @@ unsigned long ext4_count_free_inodes(struct super_block *sb)
if (!bitmap_bh)
continue;
x = ext4_count_free(bitmap_bh, EXT4_INODES_PER_GROUP(sb) / 8);
x = ext4_count_free(bitmap_bh->b_data,
EXT4_INODES_PER_GROUP(sb) / 8);
printk(KERN_DEBUG "group %lu: stored = %d, counted = %lu\n",
(unsigned long) i, ext4_free_inodes_count(sb, gdp), x);
bitmap_count += x;