src/base/allocator/partition_allocator/page_allocator_internals_posix.h

@@ -361,12 +361,7 @@ void DiscardSystemPagesInternal(uintptr_t address, size_t length) {
   // performance benefits unclear.
   //
   // Therefore, we just do the simple thing: MADV_DONTNEED.
-  int ret = madvise(ptr, length, MADV_DONTNEED);
-  if (ret && errno == ENOSYS) {
-    // Ignores when the kernel is built without CONFIG_ADVISE_SYSCALLS
-    return;
-  }
-  PA_PCHECK(ret == 0);
+  PA_PCHECK(0 == madvise(ptr, length, MADV_DONTNEED));
 #endif
 }