summaryrefslogtreecommitdiff
path: root/tools/include/linux/args.h
diff options
context:
space:
mode:
authorJakub Kicinski <kuba@kernel.org>2025-06-12 10:08:24 -0700
committerJakub Kicinski <kuba@kernel.org>2025-08-29 11:48:01 -0700
commitd23ad54de795ec0054f90ecb03b41e8f2c410f3a (patch)
tree93ee9c1bfac4b54c567cc613039d4898cac04871 /tools/include/linux/args.h
parent29828b81a46a3ae55ebc053fce512219172560ba (diff)
parent9c736ace0666efe68efd53fcdfa2c6653c3e0e72 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Cross-merge networking fixes after downstream PR (net-6.17-rc4). No conflicts. Adjacent changes: drivers/net/ethernet/intel/idpf/idpf_txrx.c 02614eee26fb ("idpf: do not linearize big TSO packets") 6c4e68480238 ("idpf: remove obsolete stashing code") Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'tools/include/linux/args.h')
-rw-r--r--tools/include/linux/args.h28
1 files changed, 28 insertions, 0 deletions
diff --git a/tools/include/linux/args.h b/tools/include/linux/args.h
new file mode 100644
index 000000000000..2e8e65d975c7
--- /dev/null
+++ b/tools/include/linux/args.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef _LINUX_ARGS_H
+#define _LINUX_ARGS_H
+
+/*
+ * How do these macros work?
+ *
+ * In __COUNT_ARGS() _0 to _12 are just placeholders from the start
+ * in order to make sure _n is positioned over the correct number
+ * from 12 to 0 (depending on X, which is a variadic argument list).
+ * They serve no purpose other than occupying a position. Since each
+ * macro parameter must have a distinct identifier, those identifiers
+ * are as good as any.
+ *
+ * In COUNT_ARGS() we use actual integers, so __COUNT_ARGS() returns
+ * that as _n.
+ */
+
+/* This counts to 15. Any more, it will return 16th argument. */
+#define __COUNT_ARGS(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, _15, _n, X...) _n
+#define COUNT_ARGS(X...) __COUNT_ARGS(, ##X, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
+
+/* Concatenate two parameters, but allow them to be expanded beforehand. */
+#define __CONCAT(a, b) a ## b
+#define CONCATENATE(a, b) __CONCAT(a, b)
+
+#endif /* _LINUX_ARGS_H */