Make library/cpp/yt/rseq a Linux-only dependency of library/cpp/yt/system

Make library/cpp/yt/rseq a Linux-only dependency of library/cpp/yt/system
commit_hash:7d6f5e738658447529440425b55b2891f6664d81

1 files changed, 8 insertions, 15 deletions

diff --git a/library/cpp/yt/system/cpu_id.cpp b/library/cpp/yt/system/cpu_id.cpp
index d4cccc21ee1..9f6e46c9fc9 100644
--- a/library/cpp/yt/system/cpu_id.cpp
+++ b/library/cpp/yt/system/cpu_id.cpp
@@ -1,10 +1,10 @@
 #include "cpu_id.h"
 
-#include <library/cpp/yt/rseq/rseq.h>
-
 #include <library/cpp/yt/misc/tls.h>
 
-#if defined(__linux__)
+#ifdef __linux__
+#include <library/cpp/yt/rseq/rseq.h>
+
 #include <sched.h>
 #endif
 
@@ -12,33 +12,26 @@ namespace NYT::NDetail {
 
 ////////////////////////////////////////////////////////////////////////////////
 
-#ifdef YT_RSEQ_AVAILABLE
+#ifdef __linux__
 
 YT_PREVENT_TLS_CACHING int GetCurrentCpuIdSlow()
 {
+#ifdef YT_RSEQ_AVAILABLE
     if (NRseq::EnsureCurrentThreadRegistered()) {
         auto cpuId = NRseq::ReadField<int>(NRseq::CpuIdFieldOffset);
         if (cpuId >= 0) {
             return cpuId;
         }
     }
-
-    auto cpuId = ::sched_getcpu();
-    return cpuId >= 0 ? cpuId : 0;
-}
-
-#elif defined(__linux__)
-
-// Linux without a known fast path (e.g. an unsupported arch): use sched_getcpu.
-int GetCurrentCpuIdSlow()
-{
+#endif
+    // No rseq fast path (unsupported arch, or thread not registered): sched_getcpu.
     auto cpuId = ::sched_getcpu();
     return cpuId >= 0 ? cpuId : 0;
 }
 
 #else
 
-// No rseq and no sched_getcpu (darwin / windows): sharding degenerates to one shard.
+// No sched_getcpu (darwin / windows): sharding degenerates to one shard.
 int GetCurrentCpuIdSlow()
 {
     return 0;