- unsigned long block = 0;
- struct buffer_head *bh;
- int blocksize = ea_inode->i_sb->s_blocksize;
- size_t csize, copied = 0;
- void *copy_pos = buf;
-
- while (copied < size) {
- csize = (size - copied) > blocksize ? blocksize : size - copied;
- bh = ext4_bread(NULL, ea_inode, block, 0);
- if (IS_ERR(bh))
- return PTR_ERR(bh);
- if (!bh)
- return -EFSCORRUPTED;
+ int blocksize = 1 << ea_inode->i_blkbits;
+ int bh_count = (size + blocksize - 1) >> ea_inode->i_blkbits;
+ int tail_size = (size % blocksize) ?: blocksize;
+ struct buffer_head *bhs_inline[8];
+ struct buffer_head **bhs = bhs_inline;
+ int i, ret;
+
+ if (bh_count > ARRAY_SIZE(bhs_inline)) {
+ bhs = kmalloc_array(bh_count, sizeof(*bhs), GFP_NOFS);
+ if (!bhs)
+ return -ENOMEM;
+ }