From 87f1f84068ea04cfa5c664fff02a83ed397ea2bf Mon Sep 17 00:00:00 2001
From: fanquake <fanquake@gmail.com>
Date: Mon, 8 Jun 2020 19:35:57 +0800
Subject: [PATCH] Merge #19194: util: Don't reference errno when pthread fails.

cb38b069b0f41b1a26264784b1c1303c8ac6ab08 util: Don't reference errno when pthread fails. (MIZUTA Takeshi)

Pull request description:

  Pthread library does not set errno.
  Pthread library's errno is returned by return value.

ACKs for top commit:
  practicalswift:
    ACK cb38b069b0f41b1a26264784b1c1303c8ac6ab08 -- patch looks correct
  MarcoFalke:
    review ACK cb38b069b0f41b1a26264784b1c1303c8ac6ab08
  hebasto:
    ACK cb38b069b0f41b1a26264784b1c1303c8ac6ab08, only squashed commits since the [previous](https://github.com/bitcoin/bitcoin/pull/19194#pullrequestreview-425831739) review.

Tree-SHA512: e6c950e30726e5031db97a7b84c8a9215da5ad3e5d233bcc349f812ad15957ddfe378e26d18339b9e0a5dcac2f50b47a687b87a6a6beaf6139df84f31531321e
---
 src/util/system.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/util/system.cpp b/src/util/system.cpp
index 5eef0abf75..387b27a187 100644
--- a/src/util/system.cpp
+++ b/src/util/system.cpp
@@ -1344,8 +1344,9 @@ void ScheduleBatchPriority()
 {
 #ifdef SCHED_BATCH
     const static sched_param param{};
-    if (pthread_setschedparam(pthread_self(), SCHED_BATCH, &param) != 0) {
-        LogPrintf("Failed to pthread_setschedparam: %s\n", strerror(errno));
+    const int rc = pthread_setschedparam(pthread_self(), SCHED_BATCH, &param);
+    if (rc != 0) {
+        LogPrintf("Failed to pthread_setschedparam: %s\n", strerror(rc));
     }
 #endif
 }