rgw/posix: std::ignore return value of write()

/ceph/src/rgw/driver/posix/notify.h: In member function 'void file::listing::Inotify::signal_shutdown()':
/ceph/src/rgw/driver/posix/notify.h:215:19: error: ignoring return value of 'ssize_t write(int, const void*, size_t)' declared with attribute 'warn_unused_result' [-Werror=unused-result]
  215 |       (void) write(efd, &msg, sizeof(uint64_t));
      |              ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1plus: all warnings being treated as errors

Fixes: https://tracker.ceph.com/issues/69241
Signed-off-by: Casey Bodley <cbodley@redhat.com>
(cherry picked from commit a2ebc00a56fcffc57b04fad1e5d134f75ae753eb)

diff --git a/src/rgw/driver/posix/notify.h b/src/rgw/driver/posix/notify.h
index 9f6088a893af7ae20d6d2a8f9fcbac0b6b00e5a5..4463abc57c2e95d98cba271e0f90de8be96761d2 100644 (file)
--- a/src/rgw/driver/posix/notify.h
+++ b/src/rgw/driver/posix/notify.h
@@ -212,7 +212,7 @@ namespace file::listing {
 
     void signal_shutdown() {
       uint64_t msg{sig_shutdown};
-      (void) write(efd, &msg, sizeof(uint64_t));
+      std::ignore = write(efd, &msg, sizeof(uint64_t));
     }
 
     friend class Notify;