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nptl: Eliminate <smp.h> and __is_smp

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Most systems are SMP, so optimizing for the UP case is no longer
approriate.  A dynamic check based on the kernel identification
has been only implemented for i386 anyway.

To disable adaptive mutexes on sh, define DEFAULT_ADAPTIVE_COUNT
as zero for this architecture.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
Florian Weimer
2020-11-13 15:19:41 +01:00
parent d5c4cce9c3
commit 26f7c72a99
9 changed files with 20 additions and 121 deletions
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3
nptl/vars.c
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@ -27,9 +27,6 @@ union pthread_attr_transparent __default_pthread_attr attribute_hidden;
/* Mutex protecting __default_pthread_attr. */
int __default_pthread_attr_lock = LLL_LOCK_INITIALIZER;
/* Flag whether the machine is SMP or not. */
int __is_smp attribute_hidden;
#ifndef TLS_MULTIPLE_THREADS_IN_TCB
/* Variable set to a nonzero value either if more than one thread runs or ran,
or if a single-threaded process is trying to cancel itself. See