Optimized SELinux compatibility support, adapted data structures to support 32-bit and 64-bit kernels

Co-authored-by: rsuntk <rsuntk@yukiprjkt.my.id>
Signed-off-by: ShirkNeko <109797057+ShirkNeko@users.noreply.github.com>

kernel/ksud.c

@@ -27,6 +27,7 @@
 #include "kernel_compat.h"
 #include "selinux/selinux.h"
 
+bool ksu_is_compat __read_mostly = false; // let it here
 
 static const char KERNEL_SU_RC[] =
 	"\n"
@@ -114,6 +115,7 @@ static const char __user *get_user_arg_ptr(struct user_arg_ptr argv, int nr)
 		if (get_user(compat, argv.ptr.compat + nr))
 			return ERR_PTR(-EFAULT);
 
+		ksu_is_compat = true;
 		return compat_ptr(compat);
 	}
 #endif