commit d33d10642fb24091e8fc8b9115f0a17d9f78491d
Author: Florian Weimer <fweimer@redhat.com>
Date:   Thu Mar 13 06:07:07 2025 +0100

    nptl: PTHREAD_COND_INITIALIZER compatibility with pre-2.41 versions (bug 32786)
    
    The new initializer and struct layout does not initialize the
    __g_signals field in the old struct layout before the change in
    commit c36fc50781995e6758cae2b6927839d0157f213c ("nptl: Remove
    g_refs from condition variables").  Bring back fields at the end
    of struct __pthread_cond_s, so that they are again zero-initialized.
    
    Reviewed-by: Sam James <sam@gentoo.org>
    (cherry picked from commit dbc5a50d12eff4cb3f782129029d04b8a76f58e7)

diff --git a/sysdeps/nptl/bits/thread-shared-types.h b/sysdeps/nptl/bits/thread-shared-types.h
index a3d482f80f7d0d35..bccc2003ec6dea5c 100644
--- a/sysdeps/nptl/bits/thread-shared-types.h
+++ b/sysdeps/nptl/bits/thread-shared-types.h
@@ -99,6 +99,8 @@ struct __pthread_cond_s
   unsigned int __g1_orig_size;
   unsigned int __wrefs;
   unsigned int __g_signals[2];
+  unsigned int __unused_initialized_1;
+  unsigned int __unused_initialized_2;
 };
 
 typedef unsigned int __tss_t;
diff --git a/sysdeps/nptl/pthread.h b/sysdeps/nptl/pthread.h
index 9af75d6eae090218..e0f24418fe4233f0 100644
--- a/sysdeps/nptl/pthread.h
+++ b/sysdeps/nptl/pthread.h
@@ -152,7 +152,7 @@ enum
 
 
 /* Conditional variable handling.  */
-#define PTHREAD_COND_INITIALIZER { { {0}, {0}, {0, 0}, 0, 0, {0, 0} } }
+#define PTHREAD_COND_INITIALIZER { { {0}, {0}, {0, 0}, 0, 0, {0, 0}, 0, 0 } }
 
 
 /* Cleanup buffers */