next four words are all set to 1 by the Linuxthreads
PTHREAD_RWLOCK_INITIALIZER. We ignore them in NPTL.
- The 16-byte aligned lock stucture causes various pthread
- structures to be over aligned. This causes some builds
- to fail which assume a maximum alignment of 8 bytes.
- Linuxthreads has been removed for 12 years, so drop
- alignment of lock structure. */
+ The 16-byte aligned lock stucture is not needed for NPTL.
+ It causes some package builds to fail (e.g., protobuf) and
+ issues with dynamic memory allocation in C++ versions prior
+ to C++17. Removing it allows for more efficient allocators
+ and better compatibility with other architectures. */
int __compat_padding[4];
unsigned int __readers;
unsigned int __writers;