nptl: Eliminate the __static_tls_size, __static_tls_align_m1 variables

Use the  __nptl_tls_static_size_for_stack inline function instead,
and the GLRO (dl_tls_static_align) value directly.

The computation of GLRO (dl_tls_static_align)  in
_dl_determine_tlsoffset ensures that the alignment is at least
TLS_TCB_ALIGN, which at least STACK_ALIGN (see allocate_stack).
Therefore, the additional rounding-up step is removed.

ALso move the initialization of the default stack size from
__pthread_initialize_minimal_internal to __pthread_early_init.
This introduces an extra system call during single-threaded startup,
but this simplifies the initialization sequence.  No locking is
needed around the writes to __default_pthread_attr because the
process is single-threaded at this point.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

1 files changed, 0 insertions, 4 deletions

diff --git a/nptl/pthreadP.h b/nptl/pthreadP.h
index 497c2ad3d9..d011a0ec34 100644
--- a/nptl/pthreadP.h
+++ b/nptl/pthreadP.h
@@ -205,10 +205,6 @@ libc_hidden_proto (__default_pthread_attr_lock)
 /* Called from __libc_freeres to deallocate the default attribute.  */
 extern void __default_pthread_attr_freeres (void) attribute_hidden;
 
-/* Size and alignment of static TLS block.  */
-extern size_t __static_tls_size attribute_hidden;
-extern size_t __static_tls_align_m1 attribute_hidden;
-
 /* Attribute handling.  */
 extern struct pthread_attr *__attr_list attribute_hidden;
 extern int __attr_list_lock attribute_hidden;