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| author | Allan Stephens <allan.stephens@windriver.com> | 2011-11-04 11:54:43 -0400 |
|---|---|---|
| committer | Paul Gortmaker <paul.gortmaker@windriver.com> | 2012-02-24 17:05:15 -0500 |
| commit | a635b46bd884efc1fc98819cb5a200da255d575c (patch) | |
| tree | 11474076133688401f58c8c0801b2c49776aa441 /net/tipc/node.c | |
| parent | 9efde4a0bd2f21dec0c7b40da2bf2c3e189e98e2 (diff) | |
| download | linux-a635b46bd884efc1fc98819cb5a200da255d575c.tar.bz2 | |
tipc: Hide internal details of node table implementation
Relocates information about the size of TIPC's node table index and
its associated hash function, since only node subsystem routines need
to have access to this information.
Note that these changes are essentially cosmetic in nature, and have
no impact on the actual operation of TIPC.
Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Diffstat (limited to 'net/tipc/node.c')
| -rw-r--r-- | net/tipc/node.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/net/tipc/node.c b/net/tipc/node.c index 153425997cce..1790f503f57b 100644 --- a/net/tipc/node.c +++ b/net/tipc/node.c @@ -39,6 +39,8 @@ #include "node.h" #include "name_distr.h" +#define NODE_HTABLE_SIZE 512 + static void node_lost_contact(struct tipc_node *n_ptr); static void node_established_contact(struct tipc_node *n_ptr); @@ -51,6 +53,17 @@ static u32 tipc_num_nodes; static atomic_t tipc_num_links = ATOMIC_INIT(0); /* + * A trivial power-of-two bitmask technique is used for speed, since this + * operation is done for every incoming TIPC packet. The number of hash table + * entries has been chosen so that no hash chain exceeds 8 nodes and will + * usually be much smaller (typically only a single node). + */ +static inline unsigned int tipc_hashfn(u32 addr) +{ + return addr & (NODE_HTABLE_SIZE - 1); +} + +/* * tipc_node_find - locate specified node object, if it exists */ |