[glibc] htl: Make pthread_mutex_t pointer-aligned

[glibc] htl: Make pthread_mutex_t pointer-aligned

[Samuel Thibault]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=af0a16a86345ca1f26e956ef44e4b7240bf705cd

commit af0a16a86345ca1f26e956ef44e4b7240bf705cd
Author: Sergey Bugaev <bugaevc@gmail.com>
Date:   Tue Feb 14 20:37:22 2023 +0300

    htl: Make pthread_mutex_t pointer-aligned
    
    This is for future-proofing. On i386, it is 4-byte aligned anyway, but
    on x86_64, we want it 8-byte aligned, not 4-byte aligned.
    
    Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
    Message-Id: <20230214173722.428140-4-bugaevc@gmail.com>

Diff:
---
 sysdeps/mach/hurd/htl/bits/types/struct___pthread_mutex.h | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/sysdeps/mach/hurd/htl/bits/types/struct___pthread_mutex.h b/sysdeps/mach/hurd/htl/bits/types/struct___pthread_mutex.h
index d7b239f40f..11caa8704b 100644
--- a/sysdeps/mach/hurd/htl/bits/types/struct___pthread_mutex.h
+++ b/sysdeps/mach/hurd/htl/bits/types/struct___pthread_mutex.h
@@ -30,20 +30,23 @@ struct __pthread_mutex
   int __shpid;
   int __type;
   int __flags;
-  unsigned int __reserved1;
-  unsigned int __reserved2;
+  union
+  {
+    unsigned int __reserved[2];
+    void *__pointer_aligned;
+  };
 };
 
 /* Static mutex initializers. */
 #define __PTHREAD_MUTEX_INITIALIZER   \
-  { 0, 0, 0, 0, __PTHREAD_MUTEX_TIMED, 0, 0, 0 }
+  { 0, 0, 0, 0, __PTHREAD_MUTEX_TIMED, 0, { { 0, 0 } } }
 
 /* The +1 is to mantain binary compatibility with the old
  * libpthread implementation. */
 #define __PTHREAD_ERRORCHECK_MUTEX_INITIALIZER   \
-  { 0, 0, 0, 0, __PTHREAD_MUTEX_ERRORCHECK + 1, 0, 0, 0 }
+  { 0, 0, 0, 0, __PTHREAD_MUTEX_ERRORCHECK + 1, 0, { { 0, 0 } } }
 
 #define __PTHREAD_RECURSIVE_MUTEX_INITIALIZER   \
-  { 0, 0, 0, 0, __PTHREAD_MUTEX_RECURSIVE + 1, 0, 0, 0 }
+  { 0, 0, 0, 0, __PTHREAD_MUTEX_RECURSIVE + 1, 0, { { 0, 0 } } }
 
 #endif /* bits/types/struct___pthread_mutex.h */