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5db9fa9593
kernel-ark/include/asm-powerpc
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Nathan Lynch 5db9fa9593 [POWERPC] Fix gettimeofday inaccuracies 
There are two problems in the powerpc gettimeofday code which can
cause incorrect results to be returned.

The first is that there is a race between do_gettimeofday and the
timer interrupt:

1. do_gettimeofday does get_tb()

2. decrementer exception on boot cpu which runs timer_recalc_offset,
   which also samples the timebase and updates the do_gtod structure
   with a greater timebase value.

3. do_gettimeofday calls __do_gettimeofday, which leads to the
   negative result from tb_val - temp_varp->tb_orig_stamp.

The second is caused by taking the boot cpu offline, which can cause
the value of tb_last_jiffy to be increased past the currently
available timebase, causing the same underflow as above.

[paulus@samba.org - define and use data_barrier() instead of mb().]

Signed-off-by: Nathan Lynch <ntl@pobox.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-23 15:51:18 +10:00
..
iseries [POWERPC] Clean up it_lp_queue.h 2006-06-28 15:18:55 +10:00
8253pit.h
a.out.h
abs_addr.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
agp.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
asm-compat.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
atomic.h power: improve inline asm memory constraints 2006-07-08 15:00:28 -07:00
auxvec.h
backlight.h [PATCH] powermac: More powermac backlight fixes 2006-07-31 13:28:45 -07:00
bitops.h power: improve inline asm memory constraints 2006-07-08 15:00:28 -07:00
bootx.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
btext.h [PATCH] powerpc: Unify udbg (#2) 2006-01-09 14:49:54 +11:00
bug.h [PATCH] git-powerpc: WARN was a dumb idea 2006-03-28 20:48:54 +11:00
bugs.h
byteorder.h
cache.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
cacheflush.h
checksum.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
compat.h [PATCH] powerpc signal __user annotations 2006-02-08 01:03:46 -05:00
cputable.h [POWERPC] Simplify the code defining the 64-bit CPU features 2006-06-28 15:19:03 +10:00
cputime.h [PATCH] powerpc: implement missing jiffies64_to_cputime64() 2006-07-05 09:39:54 -07:00
current.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
dbdma.h
delay.h [POWERPC] Fix mdelay badness on shared processor partitions 2006-06-21 15:01:33 +10:00
div64.h
dma-mapping.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
dma.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
eeh_event.h [PATCH] powerpc/pseries: clear PCI failure counter if no new failures 2006-04-22 18:46:13 +10:00
eeh.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2006-06-22 22:11:30 -07:00
elf.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2006-06-22 22:11:30 -07:00
emergency-restart.h
errno.h
fcntl.h
firmware.h [PATCH] powerpc: Rename and export ppc64_firmware_features 2006-03-28 16:45:20 +11:00
floppy.h [PATCH] irq-flags: POWERPC: Use the new IRQF_ constants 2006-07-02 13:58:47 -07:00
futex.h [PATCH] lightweight robust futexes updates 2006-03-27 08:44:49 -08:00
grackle.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
hardirq.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
heathrow.h powerpc: Fix some #ifndef __KERNEL__ that should be #ifdef 2006-01-09 15:14:05 +11:00
hvcall.h [POWERPC] check firmware state before suspending 2006-06-15 19:31:27 +10:00
hvconsole.h [PATCH] powerpc: hvc_console updates 2006-03-28 16:45:26 +11:00
hvcserver.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
hw_irq.h [PATCH] genirq: add ->retrigger() irq op to consolidate hw_irq_resend() 2006-06-29 10:26:23 -07:00
i8259.h [POWERPC] Add new interrupt mapping core and change platforms to use it 2006-07-03 21:36:01 +10:00
ibmebus.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
ide.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
immap_86xx.h [POWERPC] Add 8641 Register space and IRQ definitions. 2006-06-21 15:01:28 +10:00
io.h Merge branch 'merge' 2006-04-29 16:15:57 +10:00
ioctl.h
ioctls.h
iommu.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2006-06-22 22:11:30 -07:00
ipc.h
ipcbuf.h
ipic.h [PATCH] powerpc: moved ipic code to arch/powerpc 2006-01-09 14:48:57 +11:00
irq.h [PATCH] powerpc: fix trigger handling in the new irq code 2006-07-10 13:24:20 -07:00
irqflags.h [PATCH] lockdep: irqtrace subsystem, core 2006-07-03 15:27:03 -07:00
Kbuild Add Kbuild file for PowerPC 'make headers_install' 2006-06-18 12:17:47 +01:00
kdebug.h [PATCH] Notify page fault call chain for powerpc 2006-06-26 09:58:22 -07:00
kdump.h [POWERPC] kdump: Reserve the existing TCE mappings left by the first kernel 2006-06-28 11:59:46 +10:00
kexec.h [POWERPC] Make crash.c work on 32-bit and 64-bit 2006-08-17 16:41:10 +10:00
keylargo.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
kmap_types.h
kprobes.h [PATCH] IA64: kprobe invalidate icache of jump buffer 2006-07-31 13:28:38 -07:00
linkage.h
lmb.h [PATCH] powerpc: Remove calculation of io hole 2006-03-22 15:04:30 +11:00
local.h
lppaca.h [PATCH] Fix sparse parse error in lppaca.h 2006-01-17 17:18:25 -08:00
machdep.h [POWERPC] Add new interrupt mapping core and change platforms to use it 2006-07-03 21:36:01 +10:00
macio.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
mc146818rtc.h
mediabay.h
mman.h [PATCH] add asm-generic/mman.h 2006-02-15 15:32:22 -08:00
mmu_context.h [POWERPC] Correct the MAX_CONTEXT definition 2006-06-29 16:16:15 +10:00
mmu.h [POWERPC] powerpc: Initialise ppc_md htab pointers earlier 2006-06-28 11:59:47 +10:00
mmzone.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
module.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
mpc86xx.h Merge branch 'for_paulus' of master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc 2006-06-28 16:10:53 +10:00
mpic.h [POWERPC] Add new interrupt mapping core and change platforms to use it 2006-07-03 21:36:01 +10:00
msgbuf.h
mutex.h [PATCH] mutex subsystem, add default include/asm-*/mutex.h files 2006-01-09 15:59:19 -08:00
namei.h
nvram.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
of_device.h typo fixes: mecanism -> mechanism 2006-06-30 18:20:44 +02:00
ohare.h powerpc: Fix some #ifndef __KERNEL__ that should be #ifdef 2006-01-09 15:14:05 +11:00
oprofile_impl.h [PATCH] powerpc: Remove oprofile spinlock backtrace code 2006-03-29 13:44:16 +11:00
paca.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2006-06-22 22:11:30 -07:00
page_32.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
page_64.h [PATCH] powerpc: Fix pagetable bloat for hugepages 2006-04-28 15:02:51 +10:00
page.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2006-06-22 22:11:30 -07:00
param.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
parport.h [PATCH] powerpc: parallel port init fix 2006-01-11 14:49:24 +11:00
pci-bridge.h [POWERPC] pcibus_to_node fixes 2006-06-15 19:31:26 +10:00
pci.h [PATCH] 64bit resource: change pci core and arch code to use resource_size_t 2006-06-27 09:24:00 -07:00
percpu.h [PATCH] lockdep: add per_cpu_offset() 2006-07-03 15:27:00 -07:00
pgalloc.h [PATCH] powerpc: Fix pagetable bloat for hugepages 2006-04-28 15:02:51 +10:00
pgtable-4k.h powerpc: Use 64k pages without needing cache-inhibited large pages 2006-06-15 10:45:18 +10:00
pgtable-64k.h powerpc: Use 64k pages without needing cache-inhibited large pages 2006-06-15 10:45:18 +10:00
pgtable.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2006-06-22 22:11:30 -07:00
pmac_feature.h [PATCH] powerpc: Kill _machine and hard-coded platform numbers 2006-03-28 23:15:54 +11:00
pmac_low_i2c.h [PATCH] 3/5 powerpc: Add platform functions interpreter 2006-01-09 15:47:18 +11:00
pmac_pfunc.h typo fixes: mecanism -> mechanism 2006-06-30 18:20:44 +02:00
pmc.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
poll.h [PATCH] POLLRDHUP/EPOLLRDHUP handling for half-closed devices notifications 2006-03-25 08:22:56 -08:00
posix_types.h
ppc_asm.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
ppc-pci.h [PATCH] powerpc: properly configure DDR/P5IOC children devs 2006-03-16 16:55:07 +11:00
processor.h [POWERPC] disable floating point exceptions for init 2006-06-21 15:01:33 +10:00
prom.h [POWERPC] Add new interrupt mapping core and change platforms to use it 2006-07-03 21:36:01 +10:00
pSeries_reconfig.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
ptrace.h [PATCH] powerpc: enable PPC_PTRACE_[GS]ETREGS on ppc32 2006-06-09 21:20:51 +10:00
reg_8xx.h
reg.h [POWERPC] cell: add RAS support 2006-06-21 15:01:29 +10:00
resource.h
rtas.h [POWERPC] Fix might-sleep warning on removing cpus 2006-08-08 16:00:11 +10:00
rtc.h
rwsem.h [PATCH] lockdep: remove RWSEM_DEBUG remnants 2006-07-03 15:27:01 -07:00
scatterlist.h
seccomp.h powerpc: Fix some #ifndef __KERNEL__ that should be #ifdef 2006-01-09 15:14:05 +11:00
sections.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
semaphore.h
sembuf.h
serial.h powerpc: Introduce a new config symbol to control 16550 early debug code 2006-01-10 16:19:05 +11:00
setup.h
shmbuf.h
shmparam.h
sigcontext.h
siginfo.h
signal.h [PATCH] irq-flags: POWERPC: Use the new IRQF_ constants 2006-07-02 13:58:47 -07:00
smp.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
smu.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
sparsemem.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
spinlock_types.h
spinlock.h [PATCH] powerpc: use lwsync in atomics, bitops, lock functions 2006-01-13 21:18:50 +11:00
spu_csa.h [POWERPC] spufs: one more fix for 64k pages 2006-06-21 15:01:32 +10:00
spu_priv1.h [POWERPC] spufs: fix spu irq affinity setting 2006-06-21 15:01:31 +10:00
spu.h [POWERPC] Add new interrupt mapping core and change platforms to use it 2006-07-03 21:36:01 +10:00
sstep.h
stat.h
statfs.h
string.h powerpc: fix strncasecmp prototype 2006-03-25 09:41:40 -08:00
synch.h [PATCH] powerpc: newline for ISYNC_ON_SMP 2006-02-24 14:06:00 +11:00
syscalls.h [PATCH] powerpc: declare arch syscalls in <asm/syscalls.h> 2006-03-27 14:48:22 +11:00
systbl.h [POWERPC] Unify ppc syscall tables 2006-06-21 15:01:32 +10:00
system.h [POWERPC] Fix gettimeofday inaccuracies 2006-08-23 15:51:18 +10:00
tce.h [PATCH] powerpc: kill union tce_entry 2006-04-29 18:07:54 +10:00
termbits.h [PATCH] Add CMSPAR to termbits.h for powerpc and alpha 2006-05-26 11:55:46 -07:00
termios.h
thread_info.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
time.h [POWERPC] update asm-powerpc/time.h 2006-06-28 15:18:56 +10:00
timex.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
tlb.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
tlbflush.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
todc.h [POWERPC] todc: add support for Time-Of-Day-Clock 2006-06-29 16:22:46 +10:00
topology.h [PATCH] sched: mc/smt power savings sched policy 2006-06-27 17:32:45 -07:00
tsi108.h [POWERPC] Add tsi108 pci and platform device data register function 2006-06-29 16:20:36 +10:00
types.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
uaccess.h powerpc: Fix incorrect might_sleep in __get_user/__put_user on kernel addresses 2006-05-03 23:06:46 +10:00
ucontext.h
udbg.h [POWERPC] Add udbg support for RTAS console 2006-06-28 11:59:48 +10:00
unaligned.h
uninorth.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
user.h
vdso_datapage.h [PATCH] powerpc: Kill _machine and hard-coded platform numbers 2006-03-28 23:15:54 +11:00
vdso.h
vga.h [PATCH] vgacon: make VGA_MAP_MEM take size, remove extra use 2006-06-22 15:05:58 -07:00
vio.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2006-06-22 22:11:30 -07:00
xmon.h
xor.h