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-rw-r--r--fs/ceph/crush/hash.c149
1 files changed, 0 insertions, 149 deletions
diff --git a/fs/ceph/crush/hash.c b/fs/ceph/crush/hash.c
deleted file mode 100644
index 5873aed694bf..000000000000
--- a/fs/ceph/crush/hash.c
+++ /dev/null
@@ -1,149 +0,0 @@
-
-#include <linux/types.h>
-#include "hash.h"
-
-/*
- * Robert Jenkins' function for mixing 32-bit values
- * http://burtleburtle.net/bob/hash/evahash.html
- * a, b = random bits, c = input and output
- */
-#define crush_hashmix(a, b, c) do { \
- a = a-b; a = a-c; a = a^(c>>13); \
- b = b-c; b = b-a; b = b^(a<<8); \
- c = c-a; c = c-b; c = c^(b>>13); \
- a = a-b; a = a-c; a = a^(c>>12); \
- b = b-c; b = b-a; b = b^(a<<16); \
- c = c-a; c = c-b; c = c^(b>>5); \
- a = a-b; a = a-c; a = a^(c>>3); \
- b = b-c; b = b-a; b = b^(a<<10); \
- c = c-a; c = c-b; c = c^(b>>15); \
- } while (0)
-
-#define crush_hash_seed 1315423911
-
-static __u32 crush_hash32_rjenkins1(__u32 a)
-{
- __u32 hash = crush_hash_seed ^ a;
- __u32 b = a;
- __u32 x = 231232;
- __u32 y = 1232;
- crush_hashmix(b, x, hash);
- crush_hashmix(y, a, hash);
- return hash;
-}
-
-static __u32 crush_hash32_rjenkins1_2(__u32 a, __u32 b)
-{
- __u32 hash = crush_hash_seed ^ a ^ b;
- __u32 x = 231232;
- __u32 y = 1232;
- crush_hashmix(a, b, hash);
- crush_hashmix(x, a, hash);
- crush_hashmix(b, y, hash);
- return hash;
-}
-
-static __u32 crush_hash32_rjenkins1_3(__u32 a, __u32 b, __u32 c)
-{
- __u32 hash = crush_hash_seed ^ a ^ b ^ c;
- __u32 x = 231232;
- __u32 y = 1232;
- crush_hashmix(a, b, hash);
- crush_hashmix(c, x, hash);
- crush_hashmix(y, a, hash);
- crush_hashmix(b, x, hash);
- crush_hashmix(y, c, hash);
- return hash;
-}
-
-static __u32 crush_hash32_rjenkins1_4(__u32 a, __u32 b, __u32 c, __u32 d)
-{
- __u32 hash = crush_hash_seed ^ a ^ b ^ c ^ d;
- __u32 x = 231232;
- __u32 y = 1232;
- crush_hashmix(a, b, hash);
- crush_hashmix(c, d, hash);
- crush_hashmix(a, x, hash);
- crush_hashmix(y, b, hash);
- crush_hashmix(c, x, hash);
- crush_hashmix(y, d, hash);
- return hash;
-}
-
-static __u32 crush_hash32_rjenkins1_5(__u32 a, __u32 b, __u32 c, __u32 d,
- __u32 e)
-{
- __u32 hash = crush_hash_seed ^ a ^ b ^ c ^ d ^ e;
- __u32 x = 231232;
- __u32 y = 1232;
- crush_hashmix(a, b, hash);
- crush_hashmix(c, d, hash);
- crush_hashmix(e, x, hash);
- crush_hashmix(y, a, hash);
- crush_hashmix(b, x, hash);
- crush_hashmix(y, c, hash);
- crush_hashmix(d, x, hash);
- crush_hashmix(y, e, hash);
- return hash;
-}
-
-
-__u32 crush_hash32(int type, __u32 a)
-{
- switch (type) {
- case CRUSH_HASH_RJENKINS1:
- return crush_hash32_rjenkins1(a);
- default:
- return 0;
- }
-}
-
-__u32 crush_hash32_2(int type, __u32 a, __u32 b)
-{
- switch (type) {
- case CRUSH_HASH_RJENKINS1:
- return crush_hash32_rjenkins1_2(a, b);
- default:
- return 0;
- }
-}
-
-__u32 crush_hash32_3(int type, __u32 a, __u32 b, __u32 c)
-{
- switch (type) {
- case CRUSH_HASH_RJENKINS1:
- return crush_hash32_rjenkins1_3(a, b, c);
- default:
- return 0;
- }
-}
-
-__u32 crush_hash32_4(int type, __u32 a, __u32 b, __u32 c, __u32 d)
-{
- switch (type) {
- case CRUSH_HASH_RJENKINS1:
- return crush_hash32_rjenkins1_4(a, b, c, d);
- default:
- return 0;
- }
-}
-
-__u32 crush_hash32_5(int type, __u32 a, __u32 b, __u32 c, __u32 d, __u32 e)
-{
- switch (type) {
- case CRUSH_HASH_RJENKINS1:
- return crush_hash32_rjenkins1_5(a, b, c, d, e);
- default:
- return 0;
- }
-}
-
-const char *crush_hash_name(int type)
-{
- switch (type) {
- case CRUSH_HASH_RJENKINS1:
- return "rjenkins1";
- default:
- return "unknown";
- }
-}
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