6 Commits

Author	SHA1	Message	Date
Joseph Myers	bfff8b1bec	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
Torvald Riegel	ca6e601a9d	Use C11-like atomics instead of plain memory accesses in x86 lock elision. ... This uses atomic operations to access lock elision metadata that is accessed concurrently (ie, adapt_count fields). The size of the data is less than a word but accessed only with atomic loads and stores; therefore, we add support for shorter-size atomic load and stores too. * include/atomic.h (__atomic_check_size_ls): New. (atomic_load_relaxed, atomic_load_acquire, atomic_store_relaxed, atomic_store_release): Use it. * sysdeps/x86/elide.h (ACCESS_ONCE): Remove. (elision_adapt, ELIDE_LOCK): Use atomics. * sysdeps/unix/sysv/linux/x86/elision-lock.c (__lll_lock_elision): Use atomics and improve code comments. * sysdeps/unix/sysv/linux/x86/elision-trylock.c (__lll_trylock_elision): Likewise.	2016-12-05 16:19:43 +01:00
Joseph Myers	f7a9f785e5	Update copyright dates with scripts/update-copyrights.	2016-01-04 16:05:18 +00:00
Florian Weimer	cd4e69ed3e	nptl: Document crash due to incorrect use of locks	2015-08-20 08:44:37 +02:00
Joseph Myers	b168057aaa	Update copyright dates with scripts/update-copyrights.	2015-01-02 16:29:47 +00:00
Roland McGrath	0d749bbeba	x86: Consolidate unnecessary nptl/ subdirectories.	2014-06-24 19:17:43 -07:00