[ Originally posted on 2002/09/11; I just looked in 2.4.20-pre9 and it
was not there, hence the repost. ]
The DEF_HASH_FUZZY macro allows the user to template their hash; it
takes on a paramter for the hashing-function, namely HASHFN. When used
with a hashing-function named anything other than 'hashfn()', a module
using the kernel's fuzzy hash implementation will not compile.
None of the in-kernel 2.4.x drivers use this primitive (yet) so it's no
wonder no one has spotted it. The patch is very trivial and makes me
think that I am the very first user of the include/linux/ghash.h
hash-table primitive. ;)
Bart.
--- diff -ruN linux-2.4.19/include/linux/ghash.h linux-2.4.19+ghash-fix/include/linux/ghash.h --- linux-2.4.19/include/linux/ghash.h Wed Sep 11 10:09:57 2002 +++ linux-2.4.19+ghash-fix/include/linux/ghash.h Wed Sep 11 10:12:52 2002 @@ -106,7 +106,7 @@ \ LINKAGE TYPE * find_##NAME##_hash(struct NAME##_table * tbl, KEYTYPE pos)\ {\ - int ix = hashfn(pos);\ + int ix = HASHFN(pos);\ TYPE * ptr = tbl->hashtable[ix];\ while(ptr && KEYCMP(ptr->KEY, pos))\ ptr = ptr->PTRS.next_hash;\ @@ -206,7 +206,7 @@ \ LINKAGE TYPE * find_##NAME##_hash(struct NAME##_table * tbl, KEYTYPE pos)\ {\ - int ix = hashfn(pos);\ + int ix = HASHFN(pos);\ TYPE * ptr = tbl->hashtable[ix];\ while(ptr && KEYCMP(ptr->KEY, pos))\ ptr = ptr->PTRS.next_hash;\
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