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| author | Jeff Garzik <jgarzik@pobox.com> | 2005-09-14 08:19:08 -0400 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2005-09-14 08:19:08 -0400 |
| commit | 905ec87e93bc9e01b15c60035cd6a50c636cbaef (patch) | |
| tree | 46fd7618d6511611ffc19eb0dd4d7bc6b90a41c2 /kernel/rcupdate.c | |
| parent | 1d6ae775d7a948c9575658eb41184fd2e506c0df (diff) | |
| parent | 2f4ba45a75d6383b4a1201169a808ffea416ffa0 (diff) | |
| download | kernel-crypto-905ec87e93bc9e01b15c60035cd6a50c636cbaef.tar.gz kernel-crypto-905ec87e93bc9e01b15c60035cd6a50c636cbaef.tar.xz kernel-crypto-905ec87e93bc9e01b15c60035cd6a50c636cbaef.zip | |
Merge /spare/repo/linux-2.6/
Diffstat (limited to 'kernel/rcupdate.c')
| -rw-r--r-- | kernel/rcupdate.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c index f436993bd59..bef3b6901b7 100644 --- a/kernel/rcupdate.c +++ b/kernel/rcupdate.c @@ -45,6 +45,7 @@ #include <linux/percpu.h> #include <linux/notifier.h> #include <linux/rcupdate.h> +#include <linux/rcuref.h> #include <linux/cpu.h> /* Definition for rcupdate control block. */ @@ -72,6 +73,19 @@ DEFINE_PER_CPU(struct rcu_data, rcu_bh_data) = { 0L }; static DEFINE_PER_CPU(struct tasklet_struct, rcu_tasklet) = {NULL}; static int maxbatch = 10; +#ifndef __HAVE_ARCH_CMPXCHG +/* + * We use an array of spinlocks for the rcurefs -- similar to ones in sparc + * 32 bit atomic_t implementations, and a hash function similar to that + * for our refcounting needs. + * Can't help multiprocessors which donot have cmpxchg :( + */ + +spinlock_t __rcuref_hash[RCUREF_HASH_SIZE] = { + [0 ... (RCUREF_HASH_SIZE-1)] = SPIN_LOCK_UNLOCKED +}; +#endif + /** * call_rcu - Queue an RCU callback for invocation after a grace period. * @head: structure to be used for queueing the RCU updates. |