While trying to compile the kernel for ARM (omap2plus_defconfig) the kernel build fails with: arch/arm/kernel/ptrace.c: In function ‘syscall_trace’: arch/arm/kernel/ptrace.c:920:3: error: implicit declaration of function ‘audit_syscall_exit’ arch/arm/kernel/ptrace.c:922:3: error: implicit declaration of function ‘audit_syscall_entry’ arch/arm/kernel/ptrace.c:922:23: error: ‘AUDIT_ARCH_ARMEB’ undeclared (first use in this function) arch/arm/kernel/ptrace.c:922:23: note: each undeclared identifier is reported only once for each function it appears in make[1]: *** [arch/arm/kernel/ptrace.o] Error 1 The issue created by commit: 29ef73b7 Kernel: Audit Support For The ARM Platform We need to include the linux/audit.h header to the arch/arm/kernel/ptrace.c file to be able to compile the kernel. Signed-off-by: Peter Ujfalusi <peter.ujfalusi(a)ti.com&gt; --- arch/arm/kernel/ptrace.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c index e33870f..8e41ad2 100644 --- a/arch/arm/kernel/ptrace.c +++ b/arch/arm/kernel/ptrace.c @@ -15,6 +15,7 @@ #include <linux/elf.h> #include <linux/smp.h> #include <linux/ptrace.h> +#include <linux/audit.h> #include <linux/user.h> #include <linux/security.h> #include <linux/init.h> -- 1.7.8.4