Hugh Dickins 292f86f005 [POWERPC] Make mmiowb's io_sync preempt safe ...

If mmiowb() is always used prior to releasing spinlock as Doc suggests,
then it's safe against preemption; but I'm not convinced that's always
the case.  If preemption occurs between sync and get_paca()->io_sync = 0,
I believe there's no problem.  But in the unlikely event that gcc does
the store relative to another register than r13 (as it did with current),
then there's a small danger of setting another cpu's io_sync to 0, after
it had just set it to 1.  Rewrite ppc64 mmiowb to prevent that.

The remaining io_sync assignments in io.h all get_paca()->io_sync = 1,
which is harmless even if preempted to the wrong cpu (the context switch
itself syncs); and those in spinlock.h are while preemption is disabled.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

2006-11-01 14:52:49 +11:00

..

iseries

[POWERPC] Fix up after irq changes

2006-10-07 22:08:26 +10:00

8253pit.h

[PATCH] powerpc: Standardize on _ASM_POWERPC header symbol prefix

2005-09-09 22:11:34 +10:00

a.out.h

[PATCH] powerpc: Merge include/asm-ppc*/a.out.h into include/asm-powerpc

2005-09-21 19:21:08 +10:00

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

[POWERPC] Support feature fixups in vdso's

2006-10-25 11:54:07 +10:00

atomic.h

power: improve inline asm memory constraints

2006-07-08 15:00:28 -07:00

auxvec.h

[PATCH] powerpc: Merge vdso's and add vdso support to 32 bits kernel

2005-11-11 22:25:39 +11:00

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] Let WARN_ON/WARN_ON_ONCE return the condition

2006-09-29 09:18:06 -07:00

bugs.h

[PATCH] powerpc: Make check_bugs() static inline

2005-09-09 22:11:35 +10:00

byteorder.h

[PATCH] powerpc: merge byteorder.h

2005-09-28 15:42:53 +10:00

cache.h

Don't include linux/config.h from anywhere else in include/

2006-04-26 12:56:16 +01:00

cacheflush.h

[PATCH] powerpc: Merge cacheflush.h and cache.h

2005-11-10 13:09:22 +11:00

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] Cell timebase bug workaround

2006-10-25 11:54:18 +10:00

cputime.h

[PATCH] powerpc: implement missing jiffies64_to_cputime64()

2006-07-05 09:39:54 -07:00

current.h

[POWERPC] Make current preempt-safe

2006-11-01 14:52:48 +11:00

dbdma.h

powerpc: Merge various powermac-related header files.

2005-10-20 20:53:39 +10:00

delay.h

[POWERPC] Fix mdelay badness on shared processor partitions

2006-06-21 15:01:33 +10:00

div64.h

[PATCH] Move the identical files from include/asm-ppc{,64}

2005-08-30 13:32:05 +10:00

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

[POWERPC] Fix MMIO ops to provide expected barrier behaviour

2006-09-13 22:08:26 +10:00

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

[PATCH] Move the identical files from include/asm-ppc{,64}

2005-08-30 13:32:05 +10:00

errno.h

[PATCH] powerpc: Standardize on _ASM_POWERPC header symbol prefix

2005-09-09 22:11:34 +10:00

fcntl.h

[PATCH] Consolidate the asm-ppc*/fcntl.h files into asm-powerpc

2005-09-07 16:57:39 -07:00

firmware.h

[POWERPC] Support feature fixups in vdso's

2006-10-25 11:54:07 +10:00

floppy.h

[PATCH] irq-flags: POWERPC: Use the new IRQF_ constants

2006-07-02 13:58:47 -07:00

fs_pd.h

POWERPC: Get rid of remapping the whole immr

2006-09-21 22:37:58 +04:00

futex.h

[POWERPC] Implement PowerPC futex_atomic_cmpxchg_inatomic().

2006-09-13 18:28:41 +10:00

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] powerpc: Instrument Hypervisor Calls

2006-09-13 18:39:53 +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] Fix CHRP platforms with only 8259

2006-10-25 13:49:22 +10:00

ibmebus.h

IRQ: Use the new typedef for interrupt handler function pointers

2006-10-09 12:19:47 +01:00

ide.h

[POWERPC] clean up ide io accessors

2006-09-20 14:06:18 +10:00

immap_86xx.h

[POWERPC] Add 8641 Register space and IRQ definitions.

2006-06-21 15:01:28 +10:00

immap_qe.h

[POWERPC] Add QUICC Engine (QE) infrastructure

2006-10-04 15:24:27 +10:00

io.h

[POWERPC] Make mmiowb's io_sync preempt safe

2006-11-01 14:52:49 +11:00

ioctl.h

[PATCH] powerpc: Standardize on _ASM_POWERPC header symbol prefix

2005-09-09 22:11:34 +10:00

ioctls.h

powerpc: remove duplicate ioctl definitions

2005-11-01 14:36:30 +11:00

iommu.h

[POWERPC] Use 4kB iommu pages even on 64kB-page systems

2006-11-01 14:52:48 +11:00

ipc.h

[PATCH] Move the identical files from include/asm-ppc{,64}

2005-08-30 13:32:05 +10:00

ipcbuf.h

[PATCH] powerpc: Keep fixing merged ipcbuf.h

2005-11-03 16:58:17 +11:00

ipic.h

[POWERPC] Fix up after irq changes

2006-10-07 22:08:26 +10:00

irq_regs.h

IRQ: Maintain regs pointer globally rather than passing to IRQ handlers

2006-10-05 15:10:12 +01:00

irq.h

IRQ: Maintain regs pointer globally rather than passing to IRQ handlers

2006-10-05 15:10:12 +01:00

irqflags.h

[PATCH] lockdep: irqtrace subsystem, core

2006-07-03 15:27:03 -07:00

Kbuild

[HEADERS] One line per header in Kbuild files to reduce conflicts

2006-09-19 12:43:58 +01:00

kdebug.h

[PATCH] Notify page fault call chain for powerpc

2006-06-26 09:58:22 -07:00

kdump.h

[POWERPC] kdump: Support kernels having 64k page size.

2006-09-13 18:30:04 +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

[PATCH] powerpc: Merge kmap_types.h

2005-09-19 09:38:49 +10:00

kprobes.h

[PATCH] kprobes: handle symbol resolution when <module:.symbol> is specified

2006-10-02 07:57:16 -07:00

linkage.h

[PATCH] powerpc: Standardize on _ASM_POWERPC header symbol prefix

2005-09-09 22:11:34 +10:00

lmb.h

[PATCH] powerpc: Remove calculation of io hole

2006-03-22 15:04:30 +11:00

local.h

[PATCH] Move all the very similar files to asm-powerpc

2005-08-30 13:32:06 +10:00

lppaca.h

[POWERPC] Update lppaca offset comments

2006-08-08 17:08:58 +10:00

machdep.h

[POWERPC] Fix up after irq changes

2006-10-07 22:08:26 +10:00

macio.h

[PATCH] powerpc: sanitize header files for user space includes

2006-01-09 15:13:08 +11:00

mc146818rtc.h

[PATCH] powerpc: Standardize on _ASM_POWERPC header symbol prefix

2005-09-09 22:11:34 +10:00

mediabay.h

powerpc: Merge various powermac-related header files.

2005-10-20 20:53:39 +10:00

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

mpc85xx.h

POWERPC: Add support for the mpc8560 eval board

2006-09-21 22:31:26 +04:00

mpc86xx.h

[POWERPC] Use mpc8641hpcn PIC base address from dev tree.

2006-08-25 14:32:13 +10:00

mpic.h

[POWERPC] Fix up after irq changes

2006-10-07 22:08:26 +10:00

msgbuf.h

[PATCH] powerpc: Merge a few more include files

2005-09-09 22:11:35 +10:00

mutex.h

[PATCH] mutex subsystem, add default include/asm-*/mutex.h files

2006-01-09 15:59:19 -08:00

namei.h

[PATCH] powerpc: Standardize on _ASM_POWERPC header symbol prefix

2005-09-09 22:11:34 +10:00

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

[POWERPC] Fix oprofile support for e500 in arch/powerpc

2006-11-01 14:52:48 +11:00

paca.h

Merge branch 'linux-2.6'

2006-09-14 07:07:18 +10:00

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

[POWERPC] Remove DISCONTIGMEM cruft from page.h

2006-09-22 15:19:58 +10:00

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

Remove all inclusions of <linux/config.h>

2006-10-04 03:38:54 -04:00

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

[POWERPC] hugepage BUG fix

2006-08-24 10:07:23 +10:00

pgtable-4k.h

[PATCH] Standardize pxx_page macros

2006-09-26 08:48:51 -07:00

pgtable-64k.h

powerpc: Use 64k pages without needing cache-inhibited large pages

2006-06-15 10:45:18 +10:00

pgtable.h

[PATCH] Standardize pxx_page macros

2006-09-26 08:48:51 -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

[POWERPC] Fix oprofile support for e500 in arch/powerpc

2006-11-01 14:52:48 +11:00

poll.h

[PATCH] POLLRDHUP/EPOLLRDHUP handling for half-closed devices notifications

2006-03-25 08:22:56 -08:00

posix_types.h

[PATCH] powerpc: Merge asm-ppc*/posix_types.h

2005-09-21 19:21:07 +10:00

ppc_asm.h

[POWERPC] Cell timebase bug workaround

2006-10-25 11:54:18 +10:00

ppc-pci.h

[POWERPC] EEH: enable MMIO/DMA on frozen slot

2006-09-21 22:59:14 +10:00

processor.h

[POWERPC] Add briq support to CHRP

2006-07-07 20:19:15 +10:00

prom.h

[POWERPC] Fix device_is_compatible() const warning

2006-10-25 11:54:24 +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] Add regs_return_value() helper

2006-10-02 07:57:16 -07:00

qe_ic.h

[POWERPC] Add QUICC Engine (QE) infrastructure

2006-10-04 15:24:27 +10:00

qe.h

[POWERPC] Add QUICC Engine (QE) infrastructure

2006-10-04 15:24:27 +10:00

reg_8xx.h

[PATCH] powerpc: Merge cacheflush.h and cache.h

2005-11-10 13:09:22 +11:00

reg.h

[POWERPC] Cell timebase bug workaround

2006-10-25 11:54:18 +10:00

resource.h

[PATCH] Move all the very similar files to asm-powerpc

2005-08-30 13:32:06 +10:00

rtas.h

[POWERPC] Add a helper for calculating RTAS "config_addr" parameters

2006-08-25 13:27:35 +10:00

rtc.h

powerpc: Make set_rtc_time() return error code from lower-level function

2005-10-22 15:57:55 +10:00

rwsem.h

[PATCH] lockdep: remove RWSEM_DEBUG remnants

2006-07-03 15:27:01 -07:00

scatterlist.h

[PATCH] powerpc: merge scatterlist.h

2005-10-27 16:45:52 +10:00

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

Merge ../linux-2.6 by hand

2005-10-31 13:37:12 +11:00

sembuf.h

[PATCH] powerpc: Standardize on _ASM_POWERPC header symbol prefix

2005-09-09 22:11:34 +10:00

serial.h

powerpc: Introduce a new config symbol to control 16550 early debug code

2006-01-10 16:19:05 +11:00

setup.h

[PATCH] powerpc: Merge a few more include files

2005-09-09 22:11:35 +10:00

shmbuf.h

[PATCH] powerpc: Fix __power64__ typos that should be __powerpc64__

2005-09-09 22:11:35 +10:00

shmparam.h

[PATCH] powerpc: Standardize on _ASM_POWERPC header symbol prefix

2005-09-09 22:11:34 +10:00

sigcontext.h

powerpc: merge sigcontext.h

2005-11-03 16:24:25 +11:00

siginfo.h

[PATCH] ppc64: Add definitions for new PTRACE calls

2005-09-12 17:19:12 +10:00

signal.h

[PATCH] irq-flags: POWERPC: Use the new IRQF_ constants

2006-07-02 13:58:47 -07:00

smp.h

IRQ: Maintain regs pointer globally rather than passing to IRQ handlers

2006-10-05 15:10:12 +01:00

smu.h

[POWERPC] powermac: Constify & voidify get_property()

2006-07-31 15:55:05 +10:00

socket.h

[AF_UNIX]: Datagram getpeersec

2006-06-29 16:58:06 -07:00

sockios.h

[PATCH] powerpc: Standardize on _ASM_POWERPC header symbol prefix

2005-09-09 22:11:34 +10:00

sparsemem.h

[PATCH] powerpc: sanitize header files for user space includes

2006-01-09 15:13:08 +11:00

spinlock_types.h

[PATCH] powerpc: merge include/asm-ppc*/spinlock_types.h into include/asm-powerpc/spinlock_types.h

2005-09-21 19:21:09 +10:00

spinlock.h

[PATCH] Directed yield: direct yield of spinlocks for powerpc

2006-10-01 00:39:22 -07:00

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] spufs: add infrastructure for finding elf objects

2006-10-05 09:21:02 +10:00

sstep.h

powerpc: Make single-stepping emulation (mostly) usable on 32-bit

2005-10-28 22:48:08 +10:00

stat.h

powerpc: merge stat.h

2005-11-03 16:02:23 +11:00

statfs.h

[PATCH] powerpc: merge include/asm-ppc*/statfs.h into include/asm-powerpc/statfs.h

2005-09-21 19:21:10 +10:00

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 rmb() for e500-based machines it

2006-11-01 14:52:48 +11:00

tce.h

[POWERPC] Use 4kB iommu pages even on 64kB-page systems

2006-11-01 14:52:48 +11:00

termbits.h

[PATCH] Add CMSPAR to termbits.h for powerpc and alpha

2006-05-26 11:55:46 -07:00

termios.h

powerpc: use asm-generic/termios.h

2005-11-01 14:36:55 +11:00

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] Cell timebase bug workaround

2006-10-25 11:54:18 +10:00

timex.h

[POWERPC] Cell timebase bug workaround

2006-10-25 11:54:18 +10:00

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: introduce child field in sched_domain

2006-10-03 08:04:06 -07:00

tsi108_irq.h

[POWERPC] Update mpc7448hpc2 board irq support using device tree

2006-08-23 15:51:18 +10:00

tsi108.h

[POWERPC] Update mpc7448hpc2 board irq support using device tree

2006-08-23 15:51:18 +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

ucc_fast.h

[POWERPC] Add QUICC Engine (QE) infrastructure

2006-10-04 15:24:27 +10:00

ucc_slow.h

[POWERPC] Add QUICC Engine (QE) infrastructure

2006-10-04 15:24:27 +10:00

ucc.h

[POWERPC] Add QUICC Engine (QE) infrastructure

2006-10-04 15:24:27 +10:00

ucontext.h

powerpc: merge ucontext.h

2005-11-03 16:59:17 +11:00

udbg.h

[POWERPC] Add udbg support for RTAS console

2006-06-28 11:59:48 +10:00

unaligned.h

[PATCH] powerpc: Standardize on _ASM_POWERPC header symbol prefix

2005-09-09 22:11:34 +10:00

uninorth.h

powerpc: Merge various powermac-related header files.

2005-10-20 20:53:39 +10:00

unistd.h

[PATCH] rename the provided execve functions to kernel_execve

2006-10-02 07:57:23 -07:00

user.h

[PATCH] powerpc: Merge a few more include files

2005-09-09 22:11:35 +10:00

vdso_datapage.h

[PATCH] powerpc: Kill _machine and hard-coded platform numbers

2006-03-28 23:15:54 +11:00

vdso.h

[PATCH] powerpc: Make the vDSO functions set error code (#2)

2005-11-16 14:05:11 +11:00

vga.h

[PATCH] vgacon: make VGA_MAP_MEM take size, remove extra use

2006-06-22 15:05:58 -07:00

vio.h

[POWERPC] Constify & voidify get_property()

2006-07-31 15:55:04 +10:00

xmon.h

[POWERPC] Fix xmon=off and cleanup xmon initialisation

2006-10-04 14:52:22 +10:00

xor.h

[PATCH] Move the identical files from include/asm-ppc{,64}

2005-08-30 13:32:05 +10:00