tree 236784875a5c735688e644fe8412649e5fdbfcd7
parent 52e9d9f4b32a3bec91feb76c84e37b7dcffe5040
author OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> 1226004829 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1226014880 -0800

fat: improve fat_hash()

fat_hash() is using the algorithm known as bad. Instead of it, this
uses hash_32(). The following is the summary of test.

old hash:
	hash func (1000 times): 33489 cycles
	total inodes in hash table: 70926
	largest bucket contains: 696
	smallest bucket contains: 54

new hash:
	hash func (1000 times): 33129 cycles
	total inodes in hash table: 70926
	largest bucket contains: 315
	smallest bucket contains: 236

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>