[v20.x backport] deps: V8: backport 9ab40592f697

common.gypi

@@ -36,7 +36,7 @@
 
     # Reset this number to 0 on major V8 upgrades.
     # Increment by one for each non-official patch applied to deps/v8.
-    'v8_embedder_string': '-node.25',
+    'v8_embedder_string': '-node.26',
 
     ##### V8 defaults for Node.js #####
 

deps/v8/src/codegen/riscv/cpu-riscv.cc

@@ -15,12 +15,12 @@ namespace internal {
 void CpuFeatures::FlushICache(void* start, size_t size) {
 #if !defined(USE_SIMULATOR)
   char* end = reinterpret_cast<char*>(start) + size;
-  // The definition of this syscall is
-  // SYSCALL_DEFINE3(riscv_flush_icache, uintptr_t, start,
-  //                 uintptr_t, end, uintptr_t, flags)
-  // The flag here is set to be SYS_RISCV_FLUSH_ICACHE_LOCAL, which is
-  // defined as 1 in the Linux kernel.
-  syscall(SYS_riscv_flush_icache, start, end, 1);
+  // SYS_riscv_flush_icache is a symbolic constant used in user-space code to
+  // identify the flush_icache system call, while __NR_riscv_flush_icache is the
+  // corresponding system call number used in the kernel to dispatch the system
+  // call.
+  // The flag set to zero will flush all cpu cores.
+  syscall(__NR_riscv_flush_icache, start, end, 0);
 #endif  // !USE_SIMULATOR.
 }