Messages in this thread Patch in this message | | | Date | Tue, 26 Mar 2002 18:12:42 -0800 | From | William Lee Irwin III <> | Subject | [patch] remove dead comment |
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I hate to remove a comment from the kernel, but...
Cheers, Bill
# This is a BitKeeper generated patch for the following project: # Project Name: Linux kernel tree # This patch format is intended for GNU patch command version 2.5 or higher. # This patch includes the following deltas: # ChangeSet 1.537 -> 1.538 # mm/filemap.c 1.69 -> 1.70 # # The following is the BitKeeper ChangeSet Log # -------------------------------------------- # 02/03/26 wli@tisifone.holomorphy.com 1.538 # filemap.c: # Remove comments already present in hash.h and not corresponding to any code in filemap.c # -------------------------------------------- # diff --minimal -Nru a/mm/filemap.c b/mm/filemap.c --- a/mm/filemap.c Tue Mar 26 18:08:13 2002 +++ b/mm/filemap.c Tue Mar 26 18:08:13 2002 @@ -742,26 +742,6 @@ } /* - * Knuth recommends primes in approximately golden ratio to the maximum - * integer representable by a machine word for multiplicative hashing. - * Chuck Lever verified the effectiveness of this technique: - * http://www.citi.umich.edu/techreports/reports/citi-tr-00-1.pdf - * - * These primes are chosen to be bit-sparse, that is operations on - * them can use shifts and additions instead of multiplications for - * machines where multiplications are slow. - */ -#if BITS_PER_LONG == 32 -/* 2^31 + 2^29 - 2^25 + 2^22 - 2^19 - 2^16 + 1 */ -#define GOLDEN_RATIO_PRIME 0x9e370001UL -#elif BITS_PER_LONG == 64 -/* 2^63 + 2^61 - 2^57 + 2^54 - 2^51 - 2^18 + 1 */ -#define GOLDEN_RATIO_PRIME 0x9e37fffffffc0001UL -#else -#error Define GOLDEN_RATIO_PRIME for your wordsize. -#endif - -/* * In order to wait for pages to become available there must be * waitqueues associated with pages. By using a hash table of * waitqueues where the bucket discipline is to maintain all - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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