add riscv64 support

Modify get_cache_size to get_cache_size_alias because it
conflicts with KERNEL/arch/riscv/include/asm/cacheinfo.h
namespace.

01-add-riscv64-support.patch

@@ -0,0 +1,27 @@
+diff --git a/vdo/cpu.h b/vdo/cpu.h
+index e4b39c2b..ee449b7c 100644
+--- a/vdo/cpu.h
++++ b/vdo/cpu.h
+@@ -20,7 +20,7 @@
+ #define CACHE_LINE_BYTES 128
+ #elif defined(__s390x__)
+ #define CACHE_LINE_BYTES 256
+-#elif defined(__x86_64__) || defined(__aarch64__)
++#elif defined(__x86_64__) || defined(__aarch64__) || defined(__riscv)
+ #define CACHE_LINE_BYTES 64
+ #else
+ #error "unknown cache line size"
+diff --git a/vdo/volume.h b/vdo/volume.h
+index 3a9a8d5e..93f13a42 100644
+--- a/vdo/volume.h
++++ b/vdo/volume.h
+@@ -356,6 +356,9 @@ int __must_check get_volume_page(struct volume *volume,
+ 				 byte **data_ptr,
+ 				 struct delta_index_page **index_page_ptr);
+ 
++#if defined(__riscv)
++#define get_cache_size get_cache_size_alias
++#endif
+ size_t __must_check get_cache_size(struct volume *volume);
+ 
+ int __must_check

kvdo.spec

@@ -1,5 +1,5 @@
 #This spec is obtained from source code(kvdo-6.2.2.24.tar.gz)
-%define spec_release 2
+%define spec_release 3
 %define kmod_name		kmod-kvdo
 %define kmod_driver_version	8.2.1.2
 %define kmod_rpm_release	%{spec_release}
@@ -15,12 +15,13 @@ Summary:	Kernel Modules for Virtual Data Optimizer
 License:	GPLv2+
 URL:		http://github.com/dm-vdo/kvdo
 Source0:        https://github.com/dm-vdo/kvdo/archive/refs/tags/%{kmod_driver_version}.tar.gz
+Patch1:     01-add-riscv64-support.patch
 BuildRoot:	%(mktemp -ud %{_tmppath}/%{name}-%{version}-%{release}-XXXXXX)
 
 Requires:       dkms
 Requires:	kernel-devel >= %{kmod_kernel_version}
 Requires:       make
-ExclusiveArch:	x86_64 aarch64 loongarch64
+ExclusiveArch:	x86_64 aarch64 loongarch64 riscv64
 ExcludeArch:	s390 s390x ppc ppc64 ppc64le i686
 
 %description
@@ -77,6 +78,9 @@ rm -rf $RPM_BUILD_ROOT
 %{_usr}/src/%{kmod_name}-%{version}-%{kmod_rpm_release}/*
 
 %changelog
+* Wed Apr 12 2023 laokz <zhangkai@iscas.ac.cn> - 8.2.1.2-3
+- Add riscv64 support
+
 * Thu Feb 16 2023 Wenlong Zhang<zhangwenlong@loongson.cn> - 8.2.1.2-2
 - Add loongarch64 support