diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..0e2dc3f
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/rd-hashd-2.1.2.crate
diff --git a/dbe5735bdf005a24e54dd19559016a59f6f43536.patch b/dbe5735bdf005a24e54dd19559016a59f6f43536.patch
new file mode 100644
index 0000000..5c519b4
--- /dev/null
+++ b/dbe5735bdf005a24e54dd19559016a59f6f43536.patch
@@ -0,0 +1,30 @@
+From dbe5735bdf005a24e54dd19559016a59f6f43536 Mon Sep 17 00:00:00 2001
+From: Tejun Heo <htejun@fb.com>
+Date: Wed, 20 Oct 2021 11:10:07 -1000
+Subject: [PATCH] hashd: build fix for 32bit archs
+
+---
+ rd-hashd/src/testfiles.rs | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/rd-hashd/src/testfiles.rs b/rd-hashd/src/testfiles.rs
+index 28e046a..c3893b1 100644
+--- a/rd-hashd/src/testfiles.rs
++++ b/rd-hashd/src/testfiles.rs
+@@ -4,6 +4,7 @@ use log::{debug, trace, warn};
+ use num::Integer;
+ use rand::rngs::SmallRng;
+ use rand::SeedableRng;
++use std::convert::TryInto;
+ use std::ffi::OsStr;
+ use std::fs;
+ use std::io::{Read, Seek, SeekFrom, Write};
+@@ -177,7 +178,7 @@ impl TestFiles {
+                         libc::posix_fadvise(
+                             f.as_raw_fd(),
+                             0,
+-                            self.unit_size as i64,
++                            self.unit_size.try_into().unwrap(),
+                             libc::POSIX_FADV_DONTNEED,
+                         )
+                     };
diff --git a/rust-rd-hashd.spec b/rust-rd-hashd.spec
new file mode 100644
index 0000000..b0420c5
--- /dev/null
+++ b/rust-rd-hashd.spec
@@ -0,0 +1,57 @@
+# Generated by rust2rpm 18
+%bcond_without check
+%global __cargo_skip_build 0
+
+%global crate rd-hashd
+
+Name:           rust-%{crate}
+Version:        2.1.2
+Release:        %autorelease
+Summary:        Latency-sensitive pseudo workload for resctl-demo
+
+# Upstream license specification: Apache-2.0
+License:        ASL 2.0 and BSD and MIT
+URL:            https://crates.io/crates/rd-hashd
+Source:         %{crates_source}
+# hashd: build fix for 32bit archs
+Patch0:         https://github.com/facebookexperimental/resctl-demo/commit/dbe5735bdf005a24e54dd19559016a59f6f43536.patch
+
+ExclusiveArch:  %{rust_arches}
+
+BuildRequires:  rust-packaging
+
+%global _description %{expand:
+Latency-sensitive pseudo workload for resctl-demo.}
+
+%description %{_description}
+
+%package     -n %{crate}
+Summary:        %{summary}
+
+%description -n %{crate} %{_description}
+
+%files       -n %{crate}
+%license LICENSE
+%doc README.md
+%{_bindir}/rd-hashd
+
+%prep
+%autosetup -n %{crate}-%{version_no_tilde} -p2
+%cargo_prep
+
+%generate_buildrequires
+%cargo_generate_buildrequires
+
+%build
+%cargo_build
+
+%install
+%cargo_install
+
+%if %{with check}
+%check
+%cargo_test
+%endif
+
+%changelog
+%autochangelog
diff --git a/sources b/sources
new file mode 100644
index 0000000..1ddc2df
--- /dev/null
+++ b/sources
@@ -0,0 +1 @@
+SHA512 (rd-hashd-2.1.2.crate) = 0e5b66efa2b2089f2c1efe7dc4e61982f9e2597daa103265d848e6b3a4e0c0089fb3c660e1ea6458f4def1c1e4f07baf7302d4bb79a509633749ac7a27cb5827