crypto: prefix module autoloading with "crypto-"

[pandora-kernel.git] / include / linux / crypto.h

diff --git a/include/linux/crypto.h b/include/linux/crypto.h
index 208a632..9c8776d 100644 (file)
--- a/include/linux/crypto.h
+++ b/include/linux/crypto.h
@@ -25,6 +25,19 @@
 #include <linux/string.h>
 #include <linux/uaccess.h>
 
+/*
+ * Autoloaded crypto modules should only use a prefixed name to avoid allowing
+ * arbitrary modules to be loaded. Loading from userspace may still need the
+ * unprefixed names, so retains those aliases as well.
+ * This uses __MODULE_INFO directly instead of MODULE_ALIAS because pre-4.3
+ * gcc (e.g. avr32 toolchain) uses __LINE__ for uniqueness, and this macro
+ * expands twice on the same line. Instead, use a separate base name for the
+ * alias.
+ */
+#define MODULE_ALIAS_CRYPTO(name)      \
+               __MODULE_INFO(alias, alias_userspace, name);    \
+               __MODULE_INFO(alias, alias_crypto, "crypto-" name)
+
 /*
  * Algorithm masks and types.
  */