hawkes@sgi.com defbb2c929 [IA64] ia64: simplify and fix udelay() ... The original ia64 udelay() was simple, but flawed for platforms without synchronized ITCs: a preemption and migration to another CPU during the while-loop likely resulted in too-early termination or very, very lengthy looping. The first fix (now in 2.6.15) broke the delay loop into smaller, non-preemptible chunks, reenabling preemption between the chunks. This fix is flawed in that the total udelay is computed to be the sum of just the non-premptible while-loop pieces, i.e., not counting the time spent in the interim preemptible periods. If an interrupt or a migration occurs during one of these interim periods, then that time is invisible and only serves to lengthen the effective udelay(). This new fix backs out the current flawed fix and returns to a simple udelay(), fully preemptible and interruptible. It implements two simple alternative udelay() routines: one a default generic version that uses ia64_get_itc(), and the other an sn-specific version that uses that platform's RTC. Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>		2006-02-15 13:37:04 -08:00
..
sn	[IA64-SGI] enforce proper ordering of callouts by XPC	2006-02-15 13:35:03 -08:00
a.out.h
acpi-ext.h	[ACPI] fix IA64 build warning	2005-08-04 22:29:34 -04:00
acpi.h	[IA64] Add ACPI based P-state support	2005-08-26 15:09:24 -07:00
agp.h	[PATCH] AGP fix for Xen VMM	2005-06-07 12:35:43 -07:00
asmmacro.h
atomic.h	[PATCH] mutex subsystem, add atomic_xchg() to all arches	2006-01-09 15:59:17 -08:00
auxvec.h	[PATCH] auxiliary vector cleanups	2005-09-07 16:57:21 -07:00
bitops.h	[FLS64]: generic version	2006-01-03 13:11:06 -08:00
break.h	[PATCH] Kprobes/IA64: kdebug die notification mechanism	2005-06-23 09:45:22 -07:00
bug.h	[PATCH] remove gcc-2 checks	2006-01-08 20:14:02 -08:00
bugs.h
byteorder.h
cache.h	[PATCH] Kill L1_CACHE_SHIFT_MAX	2006-01-08 20:13:39 -08:00
cacheflush.h
checksum.h
compat.h	[PATCH] ia64: task_pt_regs()	2006-01-12 09:08:58 -08:00
cpu.h
cputime.h
current.h
cyclone.h
delay.h	[IA64] disable preemption in udelay()	2005-12-16 10:00:24 -08:00
div64.h
dma-mapping.h	[PATCH] ia64: re-implement dma_get_cache_alignment to avoid EXPORT_SYMBOL	2005-11-07 07:53:23 -08:00
dma.h
elf.h	[PATCH] auxiliary vector cleanups	2005-09-07 16:57:21 -07:00
emergency-restart.h	[PATCH] Add emergency_restart()	2005-07-26 14:35:41 -07:00
errno.h
fcntl.h	[PATCH] Clean up struct flock definitions	2005-09-07 16:57:38 -07:00
fpswa.h
fpu.h
futex.h	[PATCH] consolidate asm/futex.h	2006-01-08 20:13:39 -08:00
gcc_intrin.h
hardirq.h
hw_irq.h	[PATCH] x86/x86_64: deferred handling of writes to /proc/irqxx/smp_affinity	2005-09-07 16:57:15 -07:00
ia32.h	[IA64] Change SET_PERSONALITY to comply with comment in binfmt_elf.c.	2005-12-06 09:12:34 -08:00
ia64regs.h
ide.h	[PATCH] ia64: drop arch-specific IDE MAX_HWIFS definition	2006-02-03 08:32:11 -08:00
intel_intrin.h
intrinsics.h
io.h	[PATCH] /dev/mem: validate mmap requests	2006-01-08 20:14:02 -08:00
ioctl.h	[PATCH] Generic ioctl.h	2006-01-10 08:01:34 -08:00
ioctls.h
iosapic.h	[IA64] Minor cleanups - remove unnecessary function prototype in iosapic.h	2005-09-07 14:00:40 -07:00
ipcbuf.h
irq.h	[IA64] Manual merge fix for 3 files	2005-09-08 14:27:13 -07:00
kdebug.h	[IA64] Extend notify_die() hooks for IA64	2005-11-07 11:27:13 -08:00
kmap_types.h
kprobes.h	[IA64] prevent accidental modification of args in jprobe handler	2006-01-13 14:45:21 -08:00
kregs.h
linkage.h
local.h	[IA64] Fix missing parameter for local_add/sub	2005-12-07 11:30:11 -08:00
machvec_dig.h
machvec_hpsim.h
machvec_hpzx1_swiotlb.h	[IA64] more robust zx1/sx1000 machvec support	2005-09-14 16:22:11 -07:00
machvec_hpzx1.h	[IA64] more robust zx1/sx1000 machvec support	2005-09-14 16:22:11 -07:00
machvec_init.h
machvec_sn2.h	[IA64] remove obsolete corporate address	2006-02-15 13:25:37 -08:00
machvec.h	Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6	2005-10-28 21:09:26 -07:00
mc146818rtc.h
mca_asm.h	[PATCH] MCA/INIT: use per cpu stacks	2005-09-11 14:08:41 -07:00
mca.h	[IA64] Wire in the MCA/INIT handler stacks	2005-09-22 13:24:19 -07:00
meminit.h	Pull sparsemem-v5 into release branch	2005-10-28 14:32:56 -07:00
mman.h	[PATCH] madvise MADV_DONTFORK/MADV_DOFORK	2006-02-14 16:09:34 -08:00
mmu_context.h	[IA64] make mmu_context.h and tlb.c 80-column friendly	2005-11-03 14:43:50 -08:00
mmu.h	[IA64] Fix race in mm-context wrap-around logic.	2005-08-12 15:05:21 -07:00
mmzone.h	[PATCH] V5 ia64 SPARSEMEM - conditional changes for SPARSEMEM	2005-10-04 13:21:13 -07:00
module.h
msgbuf.h
msi.h	[PATCH] PCI: Change MSI to use physical delivery mode always	2005-11-10 16:09:18 -08:00
mutex.h	[PATCH] mutex subsystem, add default include/asm-*/mutex.h files	2006-01-09 15:59:19 -08:00
namei.h
nodedata.h	[PATCH] V5 ia64 SPARSEMEM - conditional changes for SPARSEMEM	2005-10-04 13:21:13 -07:00
numa.h
numnodes.h
page.h	[IA64] - Make pfn_valid more precise for SGI Altix systems	2005-11-29 09:24:10 -08:00
pal.h	[IA64] pal cache flush patch	2006-01-16 15:44:53 -08:00
param.h	[PATCH] ia64: Selectable Timer Interrupt Frequency	2005-06-23 09:45:10 -07:00
parport.h
patch.h
pci.h	[PATCH] Make sparc64 use setup-res.c	2005-09-08 14:57:25 -07:00
percpu.h	[PATCH] adjust per_cpu definition in non-SMP case	2005-06-23 09:45:28 -07:00
perfmon_default_smpl.h
perfmon.h	[IA64] alternate perfmon handler	2005-05-18 16:14:30 -07:00
pgalloc.h	[IA64] 4-level page tables	2005-11-11 09:37:29 -08:00
pgtable.h	[IA64] 4-level page tables	2005-11-11 09:37:29 -08:00
poll.h
posix_types.h
processor.h	[IA64] avoid broken SAL_CACHE_FLUSH implementations	2006-02-02 13:25:54 -08:00
ptrace_offsets.h
ptrace.h	[PATCH] ia64: task_pt_regs()	2006-01-12 09:08:58 -08:00
resource.h
rse.h
rwsem.h	[PATCH] add sem_is_read/write_locked()	2005-10-29 21:40:35 -07:00
sal.h	[IA64] avoid broken SAL_CACHE_FLUSH implementations	2006-02-02 13:25:54 -08:00
scatterlist.h
sections.h	[PATCH] kprobes/ia64: refuse kprobe on ivt code	2005-06-27 15:23:54 -07:00
segment.h
semaphore.h	[IA64] Fix bug in ia64 specific down() function	2006-01-17 14:04:00 -08:00
sembuf.h
serial.h
setup.h
shmbuf.h
shmparam.h
sigcontext.h
siginfo.h
signal.h
smp.h	[PATCH] smp_processor_id() cleanup	2005-06-21 18:46:13 -07:00
socket.h	[NET]: Introduce SO_{SND,RCV}BUFFORCE socket options	2005-08-29 15:31:35 -07:00
sockios.h
sparsemem.h	[PATCH] V5 ia64 SPARSEMEM - conditional changes for SPARSEMEM	2005-10-04 13:21:13 -07:00
spinlock_types.h	[PATCH] spinlock consolidation	2005-09-10 10:06:21 -07:00
spinlock.h	[PATCH] remove gcc-2 checks	2006-01-08 20:14:02 -08:00
stat.h
statfs.h
string.h
suspend.h
system.h	[IA64] remove staled comments in asm/system.h	2006-02-02 13:20:42 -08:00
termbits.h
termios.h
thread_info.h	[IA64] Handle debug traps in fsys mode	2006-01-13 14:16:08 -08:00
timex.h	[IA64] ia64: simplify and fix udelay()	2006-02-15 13:37:04 -08:00
tlb.h	[PATCH] mm: tlb_finish_mmu forget rss	2005-10-29 21:40:37 -07:00
tlbflush.h	[IA64] Use bitmaps for efficient context allocation/free	2005-10-31 14:36:05 -08:00
topology.h	[PATCH] Export cpu topology in sysfs	2006-02-03 08:32:09 -08:00
types.h	[PATCH] sab: consolidate kmem_bufctl_t	2005-09-05 00:05:48 -07:00
uaccess.h	[PATCH] ia64 basic __user annotations	2005-09-29 08:46:27 -07:00
ucontext.h
unaligned.h
uncached.h	[PATCH] ia64 uncached alloc	2005-06-21 18:46:18 -07:00
unistd.h	[IA64] unshare system call registration for ia64	2006-02-08 15:43:38 -08:00
unwind.h	[IA64] MCA/INIT: remove obsolete unwind code	2005-09-11 14:09:34 -07:00
user.h
ustack.h
vga.h	[IA64-SGI] pcdp: add PCDP pci interface support	2005-06-28 09:09:06 -07:00
xor.h