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android_kernel_xiaomi_sm8350/include/asm-sparc64
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Martin Schwidefsky ef6edc9746 [PATCH] Directed yield: cpu_relax variants for spinlocks and rw-locks 
On systems running with virtual cpus there is optimization potential in
regard to spinlocks and rw-locks.  If the virtual cpu that has taken a lock
is known to a cpu that wants to acquire the same lock it is beneficial to
yield the timeslice of the virtual cpu in favour of the cpu that has the
lock (directed yield).

With CONFIG_PREEMPT="n" this can be implemented by the architecture without
common code changes.  Powerpc already does this.

With CONFIG_PREEMPT="y" the lock loops are coded with _raw_spin_trylock,
_raw_read_trylock and _raw_write_trylock in kernel/spinlock.c.  If the lock
could not be taken cpu_relax is called.  A directed yield is not possible
because cpu_relax doesn't know anything about the lock.  To be able to
yield the lock in favour of the current lock holder variants of cpu_relax
for spinlocks and rw-locks are needed.  The new _raw_spin_relax,
_raw_read_relax and _raw_write_relax primitives differ from cpu_relax
insofar that they have an argument: a pointer to the lock structure.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-01 00:39:21 -07:00
..
a.out.h
agp.h
apb.h
asi.h
atomic.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
auxio.h
auxvec.h
bbc.h
bitops.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
bpp.h
bsderrno.h
bug.h
bugs.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
byteorder.h
cache.h
cacheflush.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
chafsr.h
checksum.h
chmctrl.h
cmt.h
compat.h
const.h
cpudata.h [SPARC64]: Send all device interrupts via one PIL. 2006-06-20 01:20:00 -07:00
cputime.h
current.h
dcr.h
dcu.h
delay.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
display7seg.h
div64.h
dma-mapping.h [SPARC64]: Fix sparc64 build errors when CONFIG_PCI=n. 2006-07-05 20:18:39 -07:00
dma.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
ebus.h [SPARC64]: Add of_device layer and make ebus/isa use it. 2006-06-23 23:15:43 -07:00
elf.h
emergency-restart.h
envctrl.h
errno.h
estate.h
fbio.h
fcntl.h
fhc.h [SPARC64]: Convert central bus layer to in-kernel PROM device tree. 2006-06-23 23:15:32 -07:00
floppy.h [PATCH] irq-flags: SPARC64: Use the new IRQF_ constants 2006-07-02 13:58:48 -07:00
fpumacro.h
futex.h
hardirq.h [SPARC64]: Move over to GENERIC_HARDIRQS. 2006-06-20 01:23:32 -07:00
head.h
hw_irq.h [SPARC64]: Move over to GENERIC_HARDIRQS. 2006-06-20 01:23:32 -07:00
hypervisor.h
ide.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
idprom.h
intr_queue.h
io.h
ioctl.h
ioctls.h
iommu.h
ipc.h
ipcbuf.h
irq.h Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6 2006-06-20 17:39:28 -07:00
isa.h [SPARC64]: Add of_device layer and make ebus/isa use it. 2006-06-23 23:15:43 -07:00
Kbuild Fix exported headers for SPARC, SPARC64 2006-09-21 08:48:27 +01:00
kdebug.h [PATCH] Notify page fault call chain for sparc64 2006-06-26 09:58:22 -07:00
kmap_types.h
kprobes.h [PATCH] IA64: kprobe invalidate icache of jump buffer 2006-07-31 13:28:38 -07:00
linkage.h
local.h
lsu.h
mc146818rtc.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
mman.h [PATCH] IA64,sparc: local DoS with corrupted ELFs 2006-09-08 08:40:46 -07:00
mmu_context.h
mmu.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
module.h
mostek.h
msgbuf.h
mutex.h
namei.h
ns87303.h
numnodes.h
of_device.h [SPARC64]: of_device layer IRQ resolution 2006-06-29 16:37:38 -07:00
openprom.h [SPARC64]: Fix more of_device layer IRQ bugs, and correct PROMREG_MAX. 2006-07-21 14:17:52 -07:00
openpromio.h
oplib.h [SPARC]: Kill prom_getname, unused and not implemented properly. 2006-07-21 14:17:55 -07:00
page.h Fix exported headers for SPARC, SPARC64 2006-09-21 08:48:27 +01:00
param.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
parport.h [SPARC64]: Use in-kernel PROM tree for EBUS and ISA. 2006-06-23 23:15:28 -07:00
pbm.h [SPARC64]: of_device layer IRQ resolution 2006-06-29 16:37:38 -07:00
pci.h [SPARC64]: Respect gfp_t argument to dma_alloc_coherent(). 2006-05-23 02:07:22 -07:00
pconf.h
percpu.h [PATCH] lockdep: add per_cpu_offset() 2006-07-03 15:27:00 -07:00
perfctr.h
pgalloc.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
pgtable.h [PATCH] Standardize pxx_page macros 2006-09-26 08:48:51 -07:00
pil.h [SPARC64]: Send all device interrupts via one PIL. 2006-06-20 01:20:00 -07:00
poll.h
posix_types.h
processor.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
prom.h [SPARC64]: of_device layer IRQ resolution 2006-06-29 16:37:38 -07:00
psrcompat.h
pstate.h
ptrace.h
reg.h
resource.h
rtc.h
rwsem-const.h
rwsem.h
sbus.h [SPARC64]: Kill starfire_cookie from SBUS/PCI. 2006-06-29 16:37:08 -07:00
scatterlist.h
scratchpad.h
seccomp.h
sections.h
semaphore.h
sembuf.h
setup.h
sfafsr.h
sfp-machine.h [SPARC64]: Fix quad-float multiply emulation. 2006-07-27 16:49:21 -07:00
shmbuf.h
shmparam.h Fix exported headers for SPARC, SPARC64 2006-09-21 08:48:27 +01:00
sigcontext.h
siginfo.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
signal.h [PATCH] irq-flags: SPARC64: Use the new IRQF_ constants 2006-07-02 13:58:48 -07:00
smp.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
socket.h [AF_UNIX]: Datagram getpeersec 2006-06-29 16:58:06 -07:00
sockios.h
solerrno.h
sparsemem.h
spinlock_types.h
spinlock.h [PATCH] Directed yield: cpu_relax variants for spinlocks and rw-locks 2006-10-01 00:39:21 -07:00
spitfire.h
starfire.h [SPARC64]: Kill starfire_cookie from SBUS/PCI. 2006-06-29 16:37:08 -07:00
stat.h
statfs.h
string.h
sunbpp.h
svr4.h
system.h [PATCH] remove set_wmb - arch removal 2006-07-14 21:56:14 -07:00
termbits.h
termios.h
thread_info.h
timer.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
timex.h
tlb.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
tlbflush.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2006-05-06 19:59:18 +01:00
topology.h [PATCH] sched: mc/smt power savings sched policy 2006-06-27 17:32:45 -07:00
tsb.h
ttable.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
types.h
uaccess.h
uctx.h
unaligned.h
unistd.h Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2006-05-24 09:22:21 +01:00
upa.h
user.h
utrap.h
vga.h [PATCH] vgacon: make VGA_MAP_MEM take size, remove extra use 2006-06-22 15:05:58 -07:00
visasm.h
watchdog.h
xor.h