Ralf Baechle 4b3e975e4a [MIPS] Fix scheduling latency issue on 24K, 34K and 74K cores ... The idle loop goes to sleep using the WAIT instruction if !need_resched(). This has is suffering from from a race condition that if if just after need_resched has returned 0 an interrupt might set TIF_NEED_RESCHED but we've just completed the test so go to sleep anyway. This would be trivial to fix by just disabling interrupts during that sequence as in: local_irq_disable(); if (!need_resched()) __asm__("wait"); local_irq_enable(); but the processor architecture leaves it undefined if a processor calling WAIT with interrupts disabled will ever restart its pipeline and indeed some processors have made use of the freedom provided by the architecture definition. This has been resolved and the Config7.WII bit indicates that the use of WAIT is safe on 24K, 24KE and 34K cores. It also is safe on 74K starting revision 2.1.0 so enable the use of WAIT with interrupts disabled for 74K based on a c0_prid of at least that. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>		2007-07-06 16:17:11 +01:00
..
arc
ddb5xxx	[MIPS] Make I8259A_IRQ_BASE customizable	2007-02-06 16:53:09 +00:00
dec	[TC] TURBOchannel support for the DECstation	2007-02-09 16:23:16 +00:00
emma2rh	[MIPS] Define MIPS_CPU_IRQ_BASE in generic header	2007-02-06 16:53:08 +00:00
ip32
jmr3927	[MIPS] JMR3927 cleanup	2007-04-27 16:20:23 +01:00
lasat	[MIPS] Fix and cleanup the mess that a dozen prom_printf variants are.	2007-03-04 19:02:37 +00:00
mach-atlas	[MIPS] SNI: Fix mc146818_decode_year	2007-03-04 19:02:31 +00:00
mach-au1x00	au1550 SPI controller driver	2007-05-08 11:15:16 -07:00
mach-cobalt	[MIPS] Add extern cobalt_board_id	2007-05-11 14:28:32 +01:00
mach-db1x00
mach-dec
mach-emma2rh	[MIPS] Define MIPS_CPU_IRQ_BASE in generic header	2007-02-06 16:53:08 +00:00
mach-ev64120	[MIPS] Add UART IRQ number for EV64120	2006-10-01 23:16:59 +01:00
mach-excite
mach-generic	[MIPS] DMA: Fix a bunch of warnings due to missing inline keywords.	2007-03-04 19:02:39 +00:00
mach-ip22
mach-ip27	[MIPS] IP27, IP35: Fix warnings.	2007-03-17 01:03:24 +00:00
mach-ip32	[MIPS] Fix include wrapper symbol definitions in IP32 code.	2007-07-04 15:53:15 +01:00
mach-jazz	[MIPS] Unify dma-{coherent,noncoherent.ip27,ip32}	2007-02-13 22:40:50 +00:00
mach-jmr3927	[MIPS] Convert to RTC-class ds1742 driver	2007-03-04 19:02:34 +00:00
mach-lasat
mach-mips	[MIPS] SNI: Fix mc146818_decode_year	2007-03-04 19:02:31 +00:00
mach-ocelot
mach-ocelot3
mach-pb1x00
mach-pnx8550	[MIPS] PNX8550 fixups	2006-10-04 18:06:15 +01:00
mach-qemu
mach-rm	[MIPS] RM: It should be #ifdef CONFIG_FOO not #if CONFIG_FOO ...	2007-03-04 19:02:38 +00:00
mach-sibyte
mach-sim
mach-vr41xx	[MIPS] Make I8259A_IRQ_BASE customizable	2007-02-06 16:53:09 +00:00
mach-wrppmc
mach-yosemite
mips-boards	[MIPS] Don't drag a platform specific header into generic arch code.	2007-06-20 22:27:10 +01:00
pci
sgi	Convert SGI IP22 and specific drivers to platform_device.	2007-05-11 17:00:29 +01:00
sibyte	[MIPS] Updated Sibyte headers	2007-04-27 16:20:24 +01:00
sn	[MIPS] IP27: Move definition of nic_t to its sole user.	2006-12-12 01:46:24 +00:00
tx4927
tx4938	fix file specification in comments	2006-10-03 23:01:26 +02:00
vr41xx	[MIPS] Make I8259A_IRQ_BASE customizable	2007-02-06 16:53:09 +00:00
xtalk
8253pit.h
a.out.h
abi.h	[MIPS] signals: Share even more code.	2007-02-18 21:31:35 +00:00
addrspace.h	[MIPS] 64-bit TO_PHYS_MASK macro for RM9000 processors	2007-07-06 16:17:10 +01:00
asm.h	[MIPS] 16K & 64K page size fixes	2006-11-01 17:46:09 +00:00
asmmacro-32.h
asmmacro-64.h
asmmacro.h	[MIPS] Remove duplicate fpu enable hazard code.	2007-06-06 19:34:31 +01:00
atomic.h	[MIPS] Fix build error in atomic64_cmpxchg	2007-05-11 14:28:33 +01:00
auxvec.h
barrier.h	[MIPS] Cleanup memory barriers for weakly ordered systems.	2006-12-04 22:43:14 +00:00
bcache.h
bitops.h	[MIPS] Remove a duplicated local variable in test_and_clear_bit()	2007-06-26 19:57:33 +02:00
bootinfo.h	[MIPS] Remove Momenco Jaguar ATX support	2007-05-11 14:28:31 +01:00
branch.h
break.h
bug.h	[MIPS] Fix BUG(), BUG_ON() handling	2007-04-20 14:58:37 +01:00
bugs.h
byteorder.h
cache.h
cachectl.h
cacheflush.h	[MIPS] Remove unused argument from kunmap_coherent().	2007-04-27 16:20:24 +01:00
cacheops.h
checksum.h	[MIPS] Fix wrong checksum for split TCP packets on 64-bit MIPS	2007-04-20 14:58:37 +01:00
compat-signal.h	[MIPS] use compat_siginfo in rt_sigframe_n32	2007-06-26 19:57:33 +02:00
compat.h	[MIPS] compat.h uses struct pt_regs so needs to include ptrace.h.	2006-12-12 01:46:24 +00:00
compiler.h
cpu-features.h	[MIPS] FPU ownership management & preemption fixes	2007-03-17 01:03:26 +00:00
cpu-info.h	[MIPS] FPU ownership management & preemption fixes	2007-03-17 01:03:26 +00:00
cpu.h	[MIPS] Add macros to encode processor revisions.	2007-07-06 16:17:11 +01:00
cputime.h
current.h
debug.h
delay.h	[MIPS] Make MIPS udelay() preempt safe under DEBUG_PREEMPT	2007-03-24 17:01:49 +00:00
device.h	Driver core: add dev_archdata to struct device	2006-12-01 14:52:01 -08:00
div64.h	[NET]: div64_64 consolidate (rev3)	2007-04-25 22:23:33 -07:00
dma-mapping.h	[MIPS] Don't claim we support dma_declare_coherent_memory - we don't.	2007-02-13 22:40:50 +00:00
dma.h	[MIPS] ISA: Fix typo	2007-03-08 01:10:30 +00:00
ds1216.h	[MIPS] Support for several more SNI RM models.	2007-02-18 21:31:37 +00:00
ds1286.h
dsp.h
elf.h
emergency-restart.h
errno.h
fcntl.h
fixmap.h	[MIPS] Fix aliasing bug in copy_to_user_page / copy_from_user_page	2006-10-21 23:17:35 +01:00
floppy.h
fpregdef.h
fpu_emulator.h
fpu.h	[MIPS] FPU hazard handling	2007-05-11 14:28:31 +01:00
futex.h	[PATCH] mm: pagefault_{disable,enable}()	2006-12-07 08:39:21 -08:00
gdb-stub.h
gfx.h
gt64120.h	[MIPS] Rewrite GALILEO_INL/GALILEO_OUTL to GT_READ/GT_WRITE	2006-11-30 01:14:43 +00:00
gt64240.h
hardirq.h
hazards.h	[MIPS] SB1: Build fix.	2007-05-11 14:28:31 +01:00
highmem.h	[MIPS] Remove LIMITED_DMA support	2007-05-11 14:28:31 +01:00
hw_irq.h
i8259.h	[MIPS] Make I8259A_IRQ_BASE customizable	2007-02-06 16:53:09 +00:00
ide.h
inst.h
inventory.h
io.h	[MIPS] Iomap implementation.	2007-02-18 21:31:34 +00:00
ioctl.h	[MIPS] Remove unreferenced _IOC_SLMASK macro in ioctl.h.	2007-02-26 23:06:06 +00:00
ioctls.h
ipc.h
ipcbuf.h
irq_cpu.h	[MIPS] Define MIPS_CPU_IRQ_BASE in generic header	2007-02-06 16:53:08 +00:00
irq_regs.h	[MIPS] Complete fixes after removal of pt_regs argument to int handlers.	2006-10-08 02:38:28 +01:00
irq.h	[MIPS] Don't drag a platform specific header into generic arch code.	2007-06-20 22:27:10 +01:00
irqflags.h	[MIPS] SMTC: Fix recursion in instant IPI replay code.	2007-03-29 23:46:36 +01:00
isadep.h
jazz.h
jazzdma.h
Kbuild
kdebug.h	move die notifier handling to common code	2007-05-08 11:15:04 -07:00
kexec.h	kdump/kexec: calculate note size at compile time	2007-05-08 11:15:07 -07:00
kmap_types.h
kspd.h
linkage.h
local.h	local_t: mips extension	2007-05-08 11:15:20 -07:00
m48t35.h
m48t37.h
marvell.h	[MIPS] MV64340: Add missing prototype for mv64340_irq_init().	2007-03-29 23:46:35 +01:00
mc146818-time.h
mc146818rtc.h
mips_mt.h	[MIPS] SMTC: <asm/mips_mt.h> must include <linux/cpumask.h>	2007-03-07 00:07:15 +00:00
mipsmtregs.h	[MIPS] MT: Nuke duplicate mips_mt_regdump() prototype.	2007-02-06 16:53:24 +00:00
mipsprom.h
mipsregs.h	[MIPS] Fix scheduling latency issue on 24K, 34K and 74K cores	2007-07-06 16:17:11 +01:00
mman.h	[PATCH] Remove final references to deprecated "MAP_ANON" page protection flag	2007-02-11 10:51:17 -08:00
mmu_context.h	[PATCH] x86: PARAVIRT: add hooks to intercept mm creation and destruction	2007-05-02 19:27:14 +02:00
mmu.h
mmzone.h
module.h	[MIPS] SMTC and non-SMTC kernel and modules are incompatible	2007-06-26 19:57:34 +02:00
msc01_ic.h	[MIPS] MT: Reenable EIC support and add support for SOCit SC.	2007-05-11 14:28:31 +01:00
msgbuf.h
mutex.h
namei.h
nile4.h
paccess.h	[MIPS] Replace old fashioned "__typeof" with "__typeof__".	2007-04-27 16:20:25 +01:00
page.h	[MIPS] Remove LIMITED_DMA support	2007-05-11 14:28:31 +01:00
param.h
parport.h
pci.h	[MIPS] Iomap implementation.	2007-02-18 21:31:34 +00:00
percpu.h
pgalloc.h	Detach sched.h from mm.h	2007-05-21 09:18:19 -07:00
pgtable-32.h	[MIPS] pte_offset(dir,addr): parenthesis fix	2006-12-06 20:16:08 +00:00
pgtable-64.h	[MIPS] Always use virt_to_phys() when translating kernel addresses	2007-03-24 17:01:49 +00:00
pgtable-bits.h
pgtable.h	Clean up mostly unused IOSPACE macros	2007-05-08 11:15:13 -07:00
pmon.h
poll.h	Consolidate asm/poll.h	2007-05-11 08:29:34 -07:00
posix_types.h
prctl.h
prefetch.h
processor.h
ptrace.h	[MIPS] die(): Properly declare as non-returning	2007-07-04 15:53:15 +01:00
qemu.h
r4kcache.h
reboot.h
reg.h
regdef.h
resource.h
rm9k-ocd.h
rtc.h
rtlx.h	[MIPS] RTLX: Handle copy_*_user return values.	2007-03-17 01:03:29 +00:00
scatterlist.h	PCI: scatterlist.h needs types.h	2007-05-02 19:02:34 -07:00
sections.h	[MIPS] Remove _fdata from asm-mips/sections.h	2007-02-06 16:53:15 +00:00
segment.h
semaphore.h
sembuf.h
serial.h	[MIPS] Remove Momenco Jaguar ATX support	2007-05-11 14:28:31 +01:00
setup.h	[PATCH] cleanup asm/setup.h userspace visibility	2006-12-07 08:39:46 -08:00
sgialib.h	[MIPS] Fix and cleanup the mess that a dozen prom_printf variants are.	2007-03-04 19:02:37 +00:00
sgiarcs.h	[MIPS] ARC: Fix warning.	2007-03-24 17:01:49 +00:00
sgidefs.h
shmbuf.h
shmparam.h
sigcontext.h	[MIPS] Add basic SMARTMIPS ASE support	2007-02-22 00:50:44 +00:00
siginfo.h
signal.h	[MIPS] signals: Share even more code.	2007-02-18 21:31:35 +00:00
sim.h
smp.h
smtc_ipi.h	[MIPS] SMTC: Fix recursion in instant IPI replay code.	2007-03-29 23:46:36 +01:00
smtc_proc.h
smtc.h	[MIPS] SMTC: Add fordward declarations for mm_struct and task_struct.	2007-03-07 00:07:16 +00:00
sni.h	[MIPS] SNI: MIPS_CPU_IRQ_BASE cleanup	2007-02-26 23:06:06 +00:00
socket.h	[NET]: Adding SO_TIMESTAMPNS / SCM_TIMESTAMPNS support	2007-04-25 22:24:21 -07:00
sockios.h	[NET]: Introduce SIOCGSTAMPNS ioctl to get timestamps with nanosec resolution	2007-04-25 22:24:04 -07:00
sparsemem.h
spinlock_types.h
spinlock.h	[MIPS] Fix __raw_read_trylock() to allow multiple readers	2007-03-07 00:07:17 +00:00
stackframe.h	[MIPS] Fix KMODE for the R3000	2007-06-11 18:20:53 +01:00
stacktrace.h	[MIPS] Make unwind_stack() can dig into interrupted context	2006-10-01 23:16:59 +01:00
stat.h
statfs.h
string.h
suspend.h
sysmips.h
system.h	[MIPS] Define and use vi_handler_t for vectored interrupt handlers.	2007-05-11 14:28:30 +01:00
termbits.h	[PATCH] tty: preparatory structures for termios revamp	2006-12-08 08:28:56 -08:00
termios.h	[PATCH] consolidate line discipline number definitions	2007-02-11 10:51:26 -08:00
thread_info.h	[MIPS] Disallow CpU exception in kernel again.	2007-04-20 14:58:37 +01:00
time.h	[MIPS] mips HPT cleanup: make clocksource_mips public	2006-11-30 01:14:49 +00:00
timex.h
titan_dep.h
tlb.h
tlbdebug.h
tlbflush.h
topology.h
traps.h
tx3912.h
types.h	[PATCH] Centralise definitions of sector_t and blkcnt_t	2006-12-04 19:41:15 -08:00
uaccess.h	[MIPS] Export __copy_user_inatomic.	2007-03-07 00:07:17 +00:00
ucontext.h
unaligned.h
unistd.h	[MIPS] Add whitelists for checksyscalls.sh	2007-07-04 15:53:16 +01:00
user.h
vga.h
vpe.h
war.h	[MIPS] RM7000: Enable ICACHE_REFILLS_WORKAROUND_WAR.	2007-07-06 16:17:11 +01:00
watch.h
wbflush.h
xor.h
xxs1500.h