audit: Add generic compat syscall support

lib/audit.c provides a generic function for auditing system calls.
This patch extends it for compat syscall support on bi-architectures
(32/64-bit) by adding lib/compat_audit.c.
What is required to support this feature are:
 * add asm/unistd32.h for compat system call names
 * select CONFIG_AUDIT_ARCH_COMPAT_GENERIC

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Acked-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Eric Paris <eparis@redhat.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/lib/Kconfig b/lib/Kconfig
index 991c98bc4a3f..1e80cb3c77a9 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -182,6 +182,15 @@ config AUDIT_GENERIC
         depends on AUDIT && !AUDIT_ARCH
         default y
 
+config AUDIT_ARCH_COMPAT_GENERIC
+        bool
+        default n
+
+config AUDIT_COMPAT_GENERIC
+        bool
+        depends on AUDIT_GENERIC && AUDIT_ARCH_COMPAT_GENERIC && COMPAT
+        default y
+
 config RANDOM32_SELFTEST
         bool "PRNG perform self test on init"
         default n