Commit 544d6adf authored Oct 05, 2020 by Yonghong Song Committed by Alexei Starovoitov Oct 06, 2020

samples/bpf: Fix a compilation error with fallthrough marking



Compiling samples/bpf hits an error related to fallthrough marking.
    ...
    CC  samples/bpf/hbm.o
  samples/bpf/hbm.c: In function ‘main’:
  samples/bpf/hbm.c:486:4: error: ‘fallthrough’ undeclared (first use in this function)
      fallthrough;
      ^~~~~~~~~~~

The "fallthrough" is not defined under tools/include directory.
Rather, it is "__fallthrough" is defined in linux/compiler.h.
Including "linux/compiler.h" and using "__fallthrough" fixed the issue.

Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20201006043427.1891805-1-yhs@fb.com

parent 9618bde4

samples/bpf/hbm.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -40,6 +40,7 @@
		#include <errno.h>
		#include <fcntl.h>
		#include <linux/unistd.h>
		#include <linux/compiler.h>

		#include <linux/bpf.h>
		#include <bpf/bpf.h>
		@@ -483,7 +484,7 @@ int main(int argc, char **argv)
		"Option -%c requires an argument.\n\n",
		optopt);
		case 'h':
		fallthrough;
		__fallthrough;
		default:
		Usage();
		return 0;

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