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| author | fche <fche> | 2007-05-29 19:24:36 +0000 |
|---|---|---|
| committer | fche <fche> | 2007-05-29 19:24:36 +0000 |
| commit | 4d88dfc7abf9e2b566136037bc405942c35a452c (patch) | |
| tree | 790190438f59d0f0cf1f7ed832c8ae113e90b9cf /runtime/map.h | |
| parent | 888af770ba125802efa0f9209064be7b5d000f87 (diff) | |
| download | systemtap-steved-4d88dfc7abf9e2b566136037bc405942c35a452c.tar.gz systemtap-steved-4d88dfc7abf9e2b566136037bc405942c35a452c.tar.xz systemtap-steved-4d88dfc7abf9e2b566136037bc405942c35a452c.zip | |
2007-05-29 Frank Ch. Eigler <fche@redhat.com>
PR 2224
* map.h (NEED_MAP_LOCKS): New config macro, defaults to 0.
(MAP_GET_CPU, MAP_PUT_CPU): Wrappers, default to ~no-op.
* map.c (_stp_pmap_clear,agg): Use them.
* pmap-gen.c (_stp_pmap_new,set,add,get_cpu,get,del): Ditto.
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]; |