fs/freevxfs/vxfs_kcompat.h

   1 #ifndef _VXFS_KCOMPAT_H
   2 #define _VXFS_KCOMPAT_H
   3
   4 #include <linux/version.h>
   5
   6 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
   7
   8 #include <linux/blkdev.h>
   9
  10 typedef long sector_t;
  11
  12 /* From include/linux/fs.h (Linux 2.5.2-pre3)  */
  13 static inline struct buffer_head * sb_bread(struct super_block *sb, int block)
  14 {
  15         return bread(sb->s_dev, block, sb->s_blocksize);
  16 }
  17
  18 /* Dito.  */
  19 static inline void map_bh(struct buffer_head *bh, struct super_block *sb, int block)
  20 {
  21         bh->b_state |= 1 << BH_Mapped;
  22         bh->b_dev = sb->s_dev;
  23         bh->b_blocknr = block;
  24 }
  25
  26 /* From fs/block_dev.c (Linux 2.5.2-pre2)  */
  27 static inline int sb_set_blocksize(struct super_block *sb, int size)
  28 {
  29         int bits;
  30         if (set_blocksize(sb->s_dev, size) < 0)
  31                 return 0;
  32         sb->s_blocksize = size;
  33         for (bits = 9, size >>= 9; size >>= 1; bits++)
  34                 ;
  35         sb->s_blocksize_bits = bits;
  36         return sb->s_blocksize;
  37 }
  38
  39 /* Dito.  */
  40 static inline int sb_min_blocksize(struct super_block *sb, int size)
  41 {
  42         int minsize = get_hardsect_size(sb->s_dev);
  43         if (size < minsize)
  44                 size = minsize;
  45         return sb_set_blocksize(sb, size);
  46 }
  47
  48 #endif /* Kernel 2.4 */
  49 #endif /* _VXFS_KCOMPAT_H */