[PATCH AUTOSEL 4.20 07/42] tools uapi: fix RISC-V 64-bit support

Sasha Levin
2019-02-09T18:57:24Z

From: Aurelien Jarno <aurelien@aurel32.net>

[ Upstream commit d0df00e30e4bf9bc27ddbd092ad683ff6121b360 ]

The BPF library is not built on 64-bit RISC-V, as the BPF feature is
not detected. Looking more in details, feature/test-bpf.c fails to build
with the following error:

| In file included from /tmp/linux-4.19.12/tools/include/uapi/asm/bitsperlong.h:17,
| from /tmp/linux-4.19.12/tools/include/uapi/asm-generic/unistd.h:2,
| from /usr/include/riscv64-linux-gnu/asm/unistd.h:1,
| from test-bpf.c:2:
| /tmp/linux-4.19.12/tools/include/asm-generic/bitsperlong.h:14:2: error: #error Inconsistent word size. Check asm/bitsperlong.h
| #error Inconsistent word size. Check asm/bitsperlong.h
| ^~~~~

The UAPI from the tools directory is missing RISC-V support, therefore
bitsperlong.h from asm-generic is used, defaulting to 32 bits.

Fix that by adding tools/arch/riscv/include/uapi/asm/bitsperlong.h as
a copy of arch/riscv/include/uapi/asm/bitsperlong.h and by updating
tools/include/uapi/asm/bitsperlong.h.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../arch/riscv/include/uapi/asm/bitsperlong.h | 25 +++++++++++++++++++
tools/include/uapi/asm/bitsperlong.h | 2 ++
2 files changed, 27 insertions(+)
create mode 100644 tools/arch/riscv/include/uapi/asm/bitsperlong.h

diff --git a/tools/arch/riscv/include/uapi/asm/bitsperlong.h b/tools/arch/riscv/include/uapi/asm/bitsperlong.h
new file mode 100644
index 000000000000..0b3cb52fd29d
--- /dev/null
+++ b/tools/arch/riscv/include/uapi/asm/bitsperlong.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2012 ARM Ltd.
+ * Copyright (C) 2015 Regents of the University of California
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _UAPI_ASM_RISCV_BITSPERLONG_H
+#define _UAPI_ASM_RISCV_BITSPERLONG_H
+
+#define __BITS_PER_LONG (__SIZEOF_POINTER__ * 8)
+
+#include <asm-generic/bitsperlong.h>
+
+#endif /* _UAPI_ASM_RISCV_BITSPERLONG_H */
diff --git a/tools/include/uapi/asm/bitsperlong.h b/tools/include/uapi/asm/bitsperlong.h
index 8dd6aefdafa4..fd92ce8388fc 100644
--- a/tools/include/uapi/asm/bitsperlong.h
+++ b/tools/include/uapi/asm/bitsperlong.h
@@ -13,6 +13,8 @@
#include "../../arch/mips/include/uapi/asm/bitsperlong.h"
#elif defined(__ia64__)
#include "../../arch/ia64/include/uapi/asm/bitsperlong.h"
+#elif defined(__riscv)
+#include "../../arch/riscv/include/uapi/asm/bitsperlong.h"
#else
#include <asm-generic/bitsperlong.h>
#endif
--
2.19.1