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From 166811dfcfc61e7646275aa993d7d7f4b02d1f49 Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Sat, 3 Apr 2021 12:40:14 -0700
Subject: [PATCH] Use SYS_futex for syscall
glibc defines SYS_futex and on newer 32bit CPUs like RISCV-32, arc there
is no 32bit time_t therefore define SYS_futex in terms of SYS_futex_time64
Upstream-Status: Pending
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
storage/innobase/sync/srw_lock.cc | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/storage/innobase/sync/srw_lock.cc b/storage/innobase/sync/srw_lock.cc
index 28b586de..3ee71142 100644
--- a/storage/innobase/sync/srw_lock.cc
+++ b/storage/innobase/sync/srw_lock.cc
@@ -226,6 +226,12 @@ void ssux_lock_impl<spinloop>::wake() noexcept { WakeByAddressSingle(&readers);
# ifdef __linux__
# include <linux/futex.h>
# include <sys/syscall.h>
+/** Newer 32bit CPUs eg. RISCV-32 are defaulting to 64bit time_t from get go and
+ therefore do not define __NR_futex */
+# if !defined(SYS_futex) && defined(SYS_futex_time64)
+# define SYS_futex SYS_futex_time64
+# endif
+
# define SRW_FUTEX(a,op,n) \
syscall(SYS_futex, a, FUTEX_ ## op ## _PRIVATE, n, nullptr, nullptr, 0)
# elif defined __OpenBSD__
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