-/* These 2 functions are here to provide blocks reservation to the rest of kernel */
-/* Reserve @blocks amount of blocks in fs pointed by @sb. Caller must make sure
- there are actually this much blocks on the FS available */
-void reiserfs_claim_blocks_to_be_allocated(struct super_block *sb, /* super block of
- filesystem where
- blocks should be
- reserved */
- int blocks /* How much to reserve */
- )
-{
-
- /* Fast case, if reservation is zero - exit immediately. */
- if (!blocks)
- return;
-
- spin_lock(&REISERFS_SB(sb)->bitmap_lock);
- REISERFS_SB(sb)->reserved_blocks += blocks;
- spin_unlock(&REISERFS_SB(sb)->bitmap_lock);
-}
-
-/* Unreserve @blocks amount of blocks in fs pointed by @sb */
-void reiserfs_release_claimed_blocks(struct super_block *sb, /* super block of
- filesystem where
- blocks should be
- reserved */
- int blocks /* How much to unreserve */
- )
-{
-
- /* Fast case, if unreservation is zero - exit immediately. */
- if (!blocks)
- return;
-
- spin_lock(&REISERFS_SB(sb)->bitmap_lock);
- REISERFS_SB(sb)->reserved_blocks -= blocks;
- spin_unlock(&REISERFS_SB(sb)->bitmap_lock);
- RFALSE(REISERFS_SB(sb)->reserved_blocks < 0,
- "amount of blocks reserved became zero?");
-}
-
-/* This function estimates how much pages we will be able to write to FS
- used for reiserfs_file_write() purposes for now. */
-int reiserfs_can_fit_pages(struct super_block *sb /* superblock of filesystem
- to estimate space */ )
-{
- int space;
-
- spin_lock(&REISERFS_SB(sb)->bitmap_lock);
- space =
- (SB_FREE_BLOCKS(sb) -
- REISERFS_SB(sb)->reserved_blocks) >> (PAGE_CACHE_SHIFT -
- sb->s_blocksize_bits);
- spin_unlock(&REISERFS_SB(sb)->bitmap_lock);
-
- return space > 0 ? space : 0;
-}
-