Gerald Schaefer 335d7afbfb mutexes, sched: Introduce arch_mutex_cpu_relax() ... The spinning mutex implementation uses cpu_relax() in busy loops as a compiler barrier. Depending on the architecture, cpu_relax() may do more than needed in this specific mutex spin loops. On System z we also give up the time slice of the virtual cpu in cpu_relax(), which prevents effective spinning on the mutex. This patch replaces cpu_relax() in the spinning mutex code with arch_mutex_cpu_relax(), which can be defined by each architecture that selects HAVE_ARCH_MUTEX_CPU_RELAX. The default is still cpu_relax(), so this patch should not affect other architectures than System z for now. Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1290437256.7455.4.camel@thinkpad> Signed-off-by: Ingo Molnar <mingo@elte.hu>		2010-11-26 15:05:34 +01:00
..
appldata	[S390] appldata: fix dev_get_stats 64 bit conversion	2010-08-13 10:06:55 +02:00
boot
crypto	[S390] cleanup facility list handling	2010-10-25 16:10:21 +02:00
hypfs	Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6	2010-10-29 08:49:18 -07:00
include/asm	mutexes, sched: Introduce arch_mutex_cpu_relax()	2010-11-26 15:05:34 +01:00
kernel	BKL: remove extraneous #include <smp_lock.h>	2010-11-17 08:59:32 -08:00
kvm	[S390] cleanup facility list handling	2010-10-25 16:10:21 +02:00
lib
math-emu
mm	[S390] fix get_user_pages_fast	2010-11-10 10:05:53 +01:00
oprofile
defconfig	defconfig reduction	2010-08-14 22:26:53 +02:00
Kbuild	[S390] standardize Kbuild rules	2010-10-25 16:10:14 +02:00
Kconfig	mutexes, sched: Introduce arch_mutex_cpu_relax()	2010-11-26 15:05:34 +01:00
Kconfig.debug	[S390] mm: add devmem_is_allowed() for STRICT_DEVMEM checking	2010-11-10 10:05:54 +01:00
Makefile	[S390] Add config option for z196 code generation.	2010-10-25 16:10:15 +02:00