linux-kernel - [PATCH v2] selftests/ir: fix build with ancient kernel headers

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Date:   Tue, 1 Feb 2022 18:38:36 +0000
From:   Sean Young <sean@...s.org>
To:     Shuah Khan <skhan@...uxfoundation.org>
Cc:     Matthew Wilcox <willy@...radead.org>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        kernel test robot <oliver.sang@...el.com>,
        Alexei Starovoitov <ast@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        lkp@...ts.01.org, kbuild test robot <lkp@...el.com>
Subject: [PATCH v2] selftests/ir: fix build with ancient kernel headers

Since commit e2bcbd7769ee ("tools headers UAPI: remove stale lirc.h"),
the build of the selftests fails on rhel 8 since its version of
/usr/include/linux/lirc.h has no definition of RC_PROTO_RCMM32, etc [1].

[1] https://lkml.org/lkml/2022/1/28/275

Fixes: e2bcbd7769ee ("tools headers UAPI: remove stale lirc.h")
Reviewed-by: Shuah Khan <skhan@...uxfoundation.org>
Reported-by: kernel test robot <oliver.sang@...el.com>
Signed-off-by: Sean Young <sean@...s.org>
---
 tools/testing/selftests/ir/ir_loopback.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tools/testing/selftests/ir/ir_loopback.c b/tools/testing/selftests/ir/ir_loopback.c
index 06256c96df12..f4a15cbdd5ea 100644
--- a/tools/testing/selftests/ir/ir_loopback.c
+++ b/tools/testing/selftests/ir/ir_loopback.c
@@ -29,6 +29,16 @@
 #define SYSFS_PATH_MAX 256
 #define DNAME_PATH_MAX 256
 
+/*
+ * Support ancient lirc.h which does not have these values. Can be removed
+ * once RHEL 8 is no longer a relevant testing platform.
+ */
+#if RC_PROTO_MAX < 26
+#define RC_PROTO_RCMM12 24
+#define RC_PROTO_RCMM24 25
+#define RC_PROTO_RCMM32 26
+#endif
+
 static const struct {
 	enum rc_proto proto;
 	const char *name;
-- 
2.34.1