linux-kernel - [PATCH v2 1/7] selftests/pidfd: Add architecture-specific fallback definitions for pidfd

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Message-ID: <20250902170147.55583-2-aqibaf@amazon.com>
Date: Tue, 2 Sep 2025 17:01:38 +0000
From: Aqib Faruqui <aqibaf@...zon.com>
To: Christian Brauner <brauner@...nel.org>, Shuah Khan <shuah@...nel.org>,
	<linux-kernel@...r.kernel.org>, <linux-kselftest@...r.kernel.org>
CC: <nh-open-source@...zon.com>, <aqibaf@...zon.com>
Subject: [PATCH v2 1/7] selftests/pidfd: Add architecture-specific fallback definitions for pidfd_open

The pidfd_open syscall number varies by architecture. Add fallback
definitions for Alpha (544) and other architectures (434) to ensure
compatibility with non-glibc C libraries that may not define these
syscall numbers.

Signed-off-by: Aqib Faruqui <aqibaf@...zon.com>
---
 tools/testing/selftests/pidfd/pidfd.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/testing/selftests/pidfd/pidfd.h b/tools/testing/selftests/pidfd/pidfd.h
index f87993def..c373ff18e 100644
--- a/tools/testing/selftests/pidfd/pidfd.h
+++ b/tools/testing/selftests/pidfd/pidfd.h
@@ -45,8 +45,12 @@
 #endif
 
 #ifndef __NR_pidfd_open
+#ifdef __alpha__
+#define __NR_pidfd_open 544
+#else
 #define __NR_pidfd_open 434
 #endif
+#endif
 
 #ifndef __NR_pidfd_send_signal
 #define __NR_pidfd_send_signal 424
-- 
2.47.3