diff options
Diffstat (limited to 'runtime/map.h')
| -rw-r--r-- | runtime/map.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/runtime/map.h b/runtime/map.h index 4bb8aee2..f89dc521 100644 --- a/runtime/map.h +++ b/runtime/map.h @@ -19,6 +19,23 @@ * @{ */ + +/* Include map spinlocks only on demand. Otherwise, assume that + caller does the right thing. */ +#ifndef NEED_MAP_LOCKS +#define NEED_MAP_LOCKS 0 +#endif + +#if NEED_MAP_LOCKS +#define MAP_GET_CPU() get_cpu() +#define MAP_PUT_CPU() put_cpu() +#else +/* get/put_cpu wrappers. Unnecessary if caller is already atomic. */ +#define MAP_GET_CPU() smp_processor_id() +#define MAP_PUT_CPU() do {} while (0) +#endif + + /* This sets the size of the hash table. */ #ifndef HASH_TABLE_BITS #define HASH_TABLE_BITS 8 @@ -102,7 +119,9 @@ struct map_root { int data_offset; +#ifdef NEED_MAP_LOCKS spinlock_t lock; +#endif /* the hash table for this array */ struct hlist_head hashes[HASH_TABLE_SIZE]; |