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authorHerbert Xu <herbert@gondor.apana.org.au>2006-08-06 20:28:44 +1000
committerHerbert Xu <herbert@gondor.apana.org.au>2006-09-21 11:16:29 +1000
commit6521f30273fbec65146a0f16de74b7b402b0f7b0 (patch)
tree1e664f6c1a7c960c60c4cae01585933029f81a5f /crypto/proc.c
parent72fa491912689ca69dd15f4266945d2c2f2819f8 (diff)
downloadlinux-6521f30273fbec65146a0f16de74b7b402b0f7b0.tar.bz2
[CRYPTO] api: Add crypto_alg reference counting
Up until now we've relied on module reference counting to ensure that the crypto_alg structures don't disappear from under us. This was good enough as long as each crypto_alg came from exactly one module. However, with parameterised crypto algorithms a crypto_alg object may need two or more modules to operate. This means that we need to count the references to the crypto_alg object directly. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'crypto/proc.c')
-rw-r--r--crypto/proc.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/crypto/proc.c b/crypto/proc.c
index c0a5dd7ce2cc..8543b7a157d6 100644
--- a/crypto/proc.c
+++ b/crypto/proc.c
@@ -12,6 +12,8 @@
* any later version.
*
*/
+
+#include <asm/atomic.h>
#include <linux/init.h>
#include <linux/crypto.h>
#include <linux/rwsem.h>
@@ -54,6 +56,7 @@ static int c_show(struct seq_file *m, void *p)
seq_printf(m, "driver : %s\n", alg->cra_driver_name);
seq_printf(m, "module : %s\n", module_name(alg->cra_module));
seq_printf(m, "priority : %d\n", alg->cra_priority);
+ seq_printf(m, "refcnt : %d\n", atomic_read(&alg->cra_refcnt));
switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) {
case CRYPTO_ALG_TYPE_CIPHER: