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linux/arch/s390/include/asm
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Gerald Schaefer 34b133f8e9 [S390] mutex: 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>
2011-01-05 12:47:31 +01:00
..
airq.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
appldata.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
asm-offsets.h
kbuild: move asm-offsets.h to include/generated
2009-12-12 13:08:14 +01:00
atomic.h
[S390] atomic: implement atomic64_dec_if_positive
2010-05-26 23:26:29 +02:00
auxvec.h
[S390] introduce vdso on s390
2008-12-25 13:38:55 +01:00
bitops.h
[S390] use inline assembly contraints available with gcc 3.3.3
2010-02-26 22:37:30 +01:00
bitsperlong.h
asm-generic: introduce asm/bitsperlong.h
2009-06-11 21:02:14 +02:00
bug.h
panic: Allow warnings to set different taint flags
2010-05-19 08:36:48 +01:00
bugs.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
byteorder.h
byteorder: make swab.h include asm/swab.h like a regular header
2009-01-14 19:56:50 -08:00
cache.h
Rename .data.read_mostly to .data..read_mostly.
2010-03-03 11:26:00 +01:00
cacheflush.h
block: add helpers to run flush_dcache_page() against a bio and a request's pages
2009-11-26 09:16:19 +01:00
ccwdev.h
[S390] cio: obtain mdc value per channel path
2011-01-05 12:47:28 +01:00
ccwgroup.h
[S390] pm: ccwgroup bus power management callbacks
2009-06-16 10:31:08 +02:00
checksum.h
[S390] convert/optimize csum_fold() to C
2009-09-11 10:29:43 +02:00
chpid.h
[S390] types: add/fix types.h include in header files
2009-01-09 12:15:06 +01:00
chsc.h
[S390] cio: move scsw helper functions to header file
2009-09-11 10:29:36 +02:00
cio.h
tree-wide: Assorted spelling fixes
2010-02-09 11:13:56 +01:00
cmb.h
[S390] types: add/fix types.h include in header files
2009-01-09 12:15:06 +01:00
compat.h
compat: Make compat_alloc_user_space() incorporate the access_ok()
2010-09-14 16:08:45 -07:00
cpcmd.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
cpu.h
[S390] correct alignment of cpuid structure
2010-10-25 16:10:19 +02:00
cputime.h
[S390] nohz: optimize arch_needs_cpu()
2011-01-05 12:47:28 +01:00
crw.h
[S390] cio: wait for channel report
2010-02-26 22:37:29 +01:00
current.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
dasd.h
[S390] dasd: Add support for raw ECKD access.
2011-01-05 12:47:30 +01:00
debug.h
[S390] s390dbf: Add description for usage of "%s" in sprintf events
2009-09-11 10:29:53 +02:00
delay.h
[S390] Provide arch specific mdelay implementation.
2009-10-06 10:35:08 +02:00
device.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
diag.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
div64.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
dma.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
ebcdic.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
elf.h
elf: kill USE_ELF_CORE_DUMP
2009-12-16 07:20:12 -08:00
emergency-restart.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
errno.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
etr.h
[S390] use inline assembly contraints available with gcc 3.3.3
2010-02-26 22:37:30 +01:00
extmem.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
fb.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
fcntl.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
fcx.h
[S390] cio: update sac values
2008-12-25 13:39:06 +01:00
ftrace.h
[S390] cleanup ftrace backend functions
2011-01-05 12:47:31 +01:00
futex.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
hardirq.h
[S390] time: move local_tick_enable()/disable() to timex.h
2011-01-05 12:47:24 +01:00
hugetlb.h
[S390] pgtable: move pte_mkhuge() from hugetlb.h to pgtable.h
2010-10-25 16:10:19 +02:00
idals.h
[S390] dasd: add High Performance FICON support
2009-03-26 15:24:05 +01:00
io.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
ioctl.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
ioctls.h
ioctl: Use asm-generic/ioctls.h on s390 (enables termiox)
2010-10-22 10:20:01 -07:00
ipcbuf.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
ipl.h
[S390] kernel: Append scpdata to kernel boot command line
2009-09-11 10:29:46 +02:00
irq_regs.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
irq.h
[S390] ap bus: add support for irq statistics
2011-01-05 12:47:26 +01:00
irqflags.h
Fix IRQ flag handling naming
2010-10-07 14:08:55 +01:00
isc.h
[S390] zcrypt: Use of Thin Interrupts
2008-12-25 13:38:57 +01:00
itcw.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
Kbuild
KVM: S390: Export kvm_virtio.h
2010-10-24 10:51:30 +02:00
kdebug.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
kexec.h
kexec jump: rename KEXEC_CONTROL_CODE_SIZE to KEXEC_CONTROL_PAGE_SIZE
2008-08-15 08:35:42 -07:00
kmap_types.h
kmap_types: make most arches use generic header file
2009-06-16 19:47:51 -07:00
kprobes.h
[S390] kprobes: jprobe save and restore
2011-01-05 12:47:24 +01:00
kvm_host.h
KVM: Remove unnecessary divide operations
2010-08-01 10:47:30 +03:00
kvm_para.h
KVM: Add __KERNEL__ guards to exported headers
2009-09-10 10:46:48 +03:00
kvm_virtio.h
KVM: S390: Add virtio hotplug add support
2010-10-24 10:51:29 +02:00
kvm.h
KVM: s390: Make psw available on all exits, not just a subset
2009-12-03 09:32:25 +02:00
linkage.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
local64.h
arch: Implement local64_t
2010-06-09 11:12:36 +02:00
local.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
lowcore.h
[S390] cleanup facility list handling
2010-10-25 16:10:21 +02:00
mathemu.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
mman.h
mm: remove duplicate asm/mman.h files
2009-09-22 07:17:42 -07:00
mmu_context.h
[S390] fix tlb flushing vs. concurrent /proc accesses
2010-08-24 09:26:34 +02:00
mmu.h
[S390] fix tlb flushing vs. concurrent /proc accesses
2010-08-24 09:26:34 +02:00
module.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
monwriter.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
msgbuf.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
mutex.h
[S390] mutex: Introduce arch_mutex_cpu_relax()
2011-01-05 12:47:31 +01:00
nmi.h
[S390] split/move machine check handler code
2009-03-26 15:24:10 +01:00
page.h
[S390] mm: add devmem_is_allowed() for STRICT_DEVMEM checking
2010-11-10 10:05:54 +01:00
param.h
[S390] Have param.h simply include <asm-generic/param.h>.
2010-01-04 09:05:58 +01:00
pci.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
percpu.h
s390: switch to dynamic percpu allocator
2009-06-24 15:13:53 +09:00
perf_event.h
irq_work: Add generic hardirq context callbacks
2010-10-18 19:58:50 +02:00
pgalloc.h
[S390] lockless get_user_pages_fast()
2010-10-25 16:10:15 +02:00
pgtable.h
mm: remove pte_*map_nested()
2010-10-26 16:52:08 -07:00
poll.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
posix_types.h
[S390] asm-s390/posix_types.h: drop __USE_ALL usage
2009-01-09 12:15:04 +01:00
processor.h
[S390] ptrace cleanup
2011-01-05 12:47:31 +01:00
ptrace.h
[S390] ptrace cleanup
2011-01-05 12:47:31 +01:00
qdio.h
[S390] qdio: outbound tasklet scan threshold
2011-01-05 12:47:28 +01:00
qeth.h
[S390] types: add/fix types.h include in header files
2009-01-09 12:15:06 +01:00
reset.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
resource.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
rwsem.h
[S390] use inline assembly contraints available with gcc 3.3.3
2010-02-26 22:37:30 +01:00
s390_ext.h
[S390] extint: get rid of early code plus cleanup
2011-01-05 12:47:26 +01:00
scatterlist.h
[S390] set ARCH_HAS_SG_CHAIN for s390
2010-10-25 16:10:15 +02:00
schid.h
[S390] types: add/fix types.h include in header files
2009-01-09 12:15:06 +01:00
sclp.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
scsw.h
[S390] cio: move scsw helper functions to header file
2009-09-11 10:29:36 +02:00
seccomp.h
[S390] secure computing arch backend
2009-06-12 10:27:31 +02:00
sections.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
segment.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
sembuf.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
setup.h
[S390] topology: clean up facility detection
2010-10-25 16:10:21 +02:00
sfp-machine.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
sfp-util.h
Revert "endian: #define __BYTE_ORDER"
2010-05-26 08:30:15 -07:00
shmbuf.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
shmparam.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
sigcontext.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
siginfo.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
signal.h
asm-generic: rename termios.h, signal.h and mman.h
2009-06-11 21:01:52 +02:00
sigp.h
[S390] spinlock: check virtual cpu running status
2010-02-26 22:37:31 +01:00
smp.h
[S390] smp/idle: call init_idle() before starting a new cpu
2011-01-05 12:47:30 +01:00
socket.h
net: Generalize socket rx gap / receive queue overflow cmsg
2009-10-12 13:26:31 -07:00
sockios.h
[S390] use generic sockios.h header file
2009-12-07 12:51:37 +01:00
sparsemem.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
spinlock_types.h
locking: Convert raw_rwlock to arch_rwlock
2009-12-14 23:55:32 +01:00
spinlock.h
[S390] use inline assembly contraints available with gcc 3.3.3
2010-02-26 22:37:30 +01:00
stat.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
statfs.h
add f_flags to struct statfs(64)
2010-08-09 16:48:44 -04:00
string.h
[S390] use compiler builtin versions of strlen/strcpy/strcat
2009-03-26 15:24:24 +01:00
suspend.h
[S390] s390: hibernation support for s390
2009-06-16 10:31:22 +02:00
swab.h
[S390] use inline assembly contraints available with gcc 3.3.3
2010-02-26 22:37:30 +01:00
syscall.h
[S390] cleanup system call parameter setup
2010-10-25 16:10:19 +02:00
sysinfo.h
[S390] topology: move topology sysinfo code
2010-10-25 16:10:21 +02:00
system.h
[S390] ptrace cleanup
2011-01-05 12:47:31 +01:00
tape390.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
termbits.h
[S390] use generic termbits.h header file
2009-12-07 12:51:37 +01:00
termios.h
asm-generic: rename termios.h, signal.h and mman.h
2009-06-11 21:01:52 +02:00
thread_info.h
[S390] ptrace cleanup
2011-01-05 12:47:31 +01:00
timer.h
[S390] extend virtual timer interface by mod_virt_timer_periodic
2009-04-14 15:37:23 +02:00
timex.h
[S390] time: let local_tick_enable/disable() reprogram the clock comparator
2011-01-05 12:47:25 +01:00
tlb.h
[S390] lockless get_user_pages_fast()
2010-10-25 16:10:15 +02:00
tlbflush.h
[S390] fix tlb flushing vs. concurrent /proc accesses
2010-08-24 09:26:34 +02:00
topology.h
[S390] topology: export cpu topology via proc/sysinfo
2010-10-25 16:10:21 +02:00
types.h
asm-generic: introduce asm/bitsperlong.h
2009-06-11 21:02:14 +02:00
uaccess.h
[S390] uaccess: implement strict user copy checks
2010-02-26 22:37:29 +01:00
ucontext.h
[S390] 64-bit register support for 31-bit processes
2009-10-06 10:35:10 +02:00
unaligned.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
unistd.h
[S390] wire up prlimit64 and fanotify* syscalls
2010-08-13 10:06:54 +02:00
user.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
vdso.h
[S390] vdso: use ntp adjusted clock multiplier
2010-04-22 17:17:19 +02:00
vtoc.h
[S390] dasd: add large volume support
2009-03-26 15:24:05 +01:00
xor.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00
zcrypt.h
[S390] move include/asm-s390 to arch/s390/include/asm
2008-08-01 20:42:05 +02:00