Architecture specific change in rpms/webkit2gtk3.git

The package rpms/webkit2gtk3.git has added or updated architecture specific content in its
spec file (ExclusiveArch/ExcludeArch or %ifarch/%ifnarch) in commit(s):
https://src.fedoraproject.org/cgit/rpms/webkit2gtk3.git/commit/?id=720031d55....

Change:
+%ifarch s390x %{power64}

Thanks.

Full change:
============

commit 720031d55bcceee7ce26061b4511dffcf75b6da1
Author: Eike Rathke 
Date:   Thu Nov 28 23:54:00 2019 +0100

Workaround s390x ppc64le build failing

For USE(JSVALUE64) the path
      #if COMPILER(GCC_COMPATIBLE) && USE(JSVALUE64)
    is hit but only implemented for CPU(X86_64) and CPU(ARM64)

diff --git a/webkit2gtk3.spec b/webkit2gtk3.spec
index 178d718..a8436ed 100644
--- a/webkit2gtk3.spec
+++ b/webkit2gtk3.spec
@@ -18,6 +18,10 @@ Source0:        http://webkitgtk.org/releases/webkitgtk-%%7Bversion%7D.tar.xz
 Patch0:     user-agent-branding.patch
 # Don't use the shebang, but point straight to python 3
 Patch1:     no-env-shebang.patch
+%ifarch s390x %{power64}
+# Implementation for GCC non-x86/arm not available, use default fallback.
+Patch2:     workaround-JSVALUE64-architecture.patch
+%endif

BuildRequires:  bison
 BuildRequires:  bubblewrap
diff --git a/workaround-JSVALUE64-architecture.patch b/workaround-JSVALUE64-architecture.patch
new file mode 100644
index 0000000..a7ba3b3
--- /dev/null
+++ b/workaround-JSVALUE64-architecture.patch
@@ -0,0 +1,29 @@
+--- webkitgtk-2.27.3/Source/JavaScriptCore/heap/GCMemoryOperations.h.JSVALUE64-architecture	2019-11-18 09:38:36.000000000 +0100
++++ webkitgtk-2.27.3/Source/JavaScriptCore/heap/GCMemoryOperations.h	2019-11-28 22:57:42.627998747 +0100
+@@ -53,7 +53,7 @@ ALWAYS_INLINE void gcSafeMemcpy(T* dst,
+             bitwise_cast<volatile uint64_t*>(dst)[i] = bitwise_cast<volatile uint64_t*>(src)[i];
+     };
+ 
+-#if COMPILER(GCC_COMPATIBLE) && USE(JSVALUE64)
++#if COMPILER(GCC_COMPATIBLE) && USE(JSVALUE64) && 0
+     if (bytes <= smallCutoff)
+         slowPathForwardMemcpy();
+     else if (isARM64() || bytes <= mediumCutoff) {
+@@ -168,7 +168,7 @@ ALWAYS_INLINE void gcSafeMemmove(T* dst,
+             bitwise_cast<volatile uint64_t*>(dst)[i] = bitwise_cast<volatile uint64_t*>(src)[i];
+     };
+ 
+-#if COMPILER(GCC_COMPATIBLE) 
++#if COMPILER(GCC_COMPATIBLE) && 0
+     if (bytes <= smallCutoff)
+         slowPathBackwardsMemmove();
+     else {
+@@ -255,7 +255,7 @@ ALWAYS_INLINE void gcSafeZeroMemory(T* d
+     static_assert(sizeof(T) == sizeof(JSValue));
+     RELEASE_ASSERT(bytes % 8 == 0);
+ #if USE(JSVALUE64)
+-#if COMPILER(GCC_COMPATIBLE)
++#if COMPILER(GCC_COMPATIBLE) && 0
+ #if CPU(X86_64)
+     uint64_t zero = 0;
+     size_t count = bytes / 8;