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selftests/futex: Define SYS_futex on 32-bit architectures with 64-bit time_t

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[ Upstream commit 04850819c65c8242072818655d4341e70ae998b5 ]

The kernel does not provide sys_futex() on 32-bit architectures that do not
support 32-bit time representations, such as riscv32.

As a result, glibc cannot define SYS_futex, causing compilation failures in
tests that rely on this syscall. Define SYS_futex as SYS_futex_time64 in
such cases to ensure successful compilation and compatibility.

Signed-off-by: Cynthia Huang <cynthia@andestech.com>
Signed-off-by: Ben Zong-You Xie <ben717@andestech.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
Link: https://lore.kernel.org/all/20250710103630.3156130-1-ben717@andestech.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Cynthia Huang 2025-07-10 18:36:30 +08:00 • committed by Greg Kroah-Hartman
commit 86b225d594
1 changed files with 11 additions and 0 deletions
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11
tools/testing/selftests/futex/include/futextest.h
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@ -47,6 +47,17 @@ typedef volatile u_int32_t futex_t;
FUTEX_PRIVATE_FLAG)
#endif
/*
* SYS_futex is expected from system C library, in glibc some 32-bit
* architectures (e.g. RV32) are using 64-bit time_t, therefore it doesn't have
* SYS_futex defined but just SYS_futex_time64. Define SYS_futex as
* SYS_futex_time64 in this situation to ensure the compilation and the
* compatibility.
*/
#if !defined(SYS_futex) && defined(SYS_futex_time64)
#define SYS_futex SYS_futex_time64
#endif
/**
* futex() - SYS_futex syscall wrapper
* @uaddr: address of first futex