nilfs2: remove bmap pointer operations

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Previously, the bmap codes of nilfs used three types of function
tables.  The abuse of indirect function calls decreased source
readability and suffered many indirect jumps which would confuse
branch prediction of processors.

This eliminates one type of the function tables,
nilfs_bmap_ptr_operations, which was used to dispatch low level
pointer operations of the nilfs bmap.

This adds a new integer variable "b_ptr_type" to nilfs_bmap struct,
and uses the value to select the pointer operations.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

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This commit is contained in:

Ryusuke Konishi 2009-05-24 03:25:44 +09:00

parent 3033342a0b

commit d4b961576d

4 changed files with 187 additions and 234 deletions

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185

fs/nilfs2/bmap.c

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110

fs/nilfs2/bmap.h

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100

fs/nilfs2/btree.c

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30

fs/nilfs2/direct.c

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