Noticed missing header when build bpfilter helper:

    CC [U]  net/bpfilter/main.o
  In file included from /usr/include/linux/errno.h:1,
                   from /usr/include/bits/errno.h:26,
                   from /usr/include/errno.h:28,
                   from net/bpfilter/main.c:4:
  tools/include/uapi/asm/errno.h:13:10: fatal error:
    ../../../arch/ia64/include/uapi/asm/errno.h: No such file or directory
     13 | #include "../../../arch/ia64/include/uapi/asm/errno.h"
        |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

CC: linux-kernel@vger.kernel.org
CC: netdev@vger.kernel.org
CC: bpf@vger.kernel.org
Signed-off-by: Sergei Trofimovich <redacted>
---
 tools/arch/ia64/include/uapi/asm/errno.h | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 tools/arch/ia64/include/uapi/asm/errno.h

diff --git a/tools/arch/ia64/include/uapi/asm/errno.h b/tools/arch/ia64/include/uapi/asm/errno.h
new file mode 100644
index 000000000000..4c82b503d92f
--- /dev/null
+++ b/tools/arch/ia64/include/uapi/asm/errno.h

@@ -0,0 +1 @@
+#include <asm-generic/errno.h>

-- 
2.30.2