xen/arm: actually pass a non-NULL percpu pointer to request_percpu_irq

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Ian Campbell <ian.camjpbell@citrix.com>
CC: stable@vger.kernel.org
xen/arm: implement HYPERVISOR_vcpu_op

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Ian Campbell <ian.campbell@citrix.com>
xen/arm: SMP support

Map vcpu_info using VCPUOP_register_vcpu_info on all the online vcpus,
make sure the allocated struct doesn't cross a page boundary.

Call enable_percpu_irq on every cpu.

Changes in v5:
- allocate xen_vcpu_info dynamically, aligning it to the size of the
struct;
- use VCPUOP_register_vcpu_info on cpu0 too.

Changed in v2:
- move the percpu variable argument fix to a separate patch;
- remove unused variable.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
xen: move the xenvm machine to mach-virt

xenvm is based on mach-vexpress, move it to mach-virt.

Changes in v4:
- update the dts Makefile too.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
CC: Marc Zyngier <marc.zyngier@arm.com>
CC: will.deacon@arm.com
CC: arnd@arndb.de
CC: rob.herring@calxeda.com
xen/arm: XEN selects ARM_PSCI

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
xenvm: add a simple PSCI node and a second cpu

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
CC: rob.herring@calxeda.com
CC: will.deacon@arm.com
CC: arnd@arndb.de
xen/arm: use sched_op hypercalls for machine reboot and power off

Changes in v5:
- set pm_power_off and arm_pm_restart from the Xen specific
intialization code.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
xen/arm: remove duplicated include from enlighten.c

Remove duplicated include.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
hfs: SMP race on directory close()

->open_dir_list needs protection...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
mtd_blktrans_ops->release() should return void

Both existing instances always return 0 and even if they didn't,
the value would be lost on the way out.  Just don't bother...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
parisc: remove the second argument of kmap_atomic

kmap_atomic allows only one argument now, just move the second.

Signed-off-by: Zhao Hongjiang <zhaohongjiang@huawei.com>
Signed-off-by: Helge Deller <deller@gmx.de>
parisc: fix whitespace errors in arch/parisc/kernel/traps.c

Things like " \t" and whitespace at end of line. I'm leaving all the other
coding style errors here alone.

Signed-off-by: Rolf Eike Beer <eike-kernel@sf-tec.de>
Signed-off-by: Helge Deller <deller@gmx.de>
parisc: Provide default implementation for dma_{alloc, free}_attrs

Most architectures that define CONFIG_HAVE_DMA, have implementations for
both dma_alloc_attrs() and dma_free_attrs().  All achitectures that do
not define CONFIG_HAVE_DMA also have both of these definitions provided by
dma-mapping-broken.h.

Add default implementations for these functions on parisc.

Signed-off-by: Damian Hobson-Garcia <dhobsong@igel.co.jp>
Signed-off-by: Helge Deller <deller@gmx.de>
parisc: fix partly 16/64k PAGE_SIZE boot

This patch fixes partly PAGE_SIZEs of 16K or 64K by adjusting the
assembler PTE lookup code and the assembler TEMPALIAS code.  Furthermore
some data alignments for PAGE_SIZE have been limited to 4K (or less) to
not waste too much memory with greater page sizes. As a side note, the
palo loader can (currently) only handle up to 10 ELF segments which is
fixed with tighter aligning as well.

My testings indicated that the ldci command in the sba iommu coding
needed adjustment by the PAGE_SHIFT value and that the I/O PDIR Page
size was only set to 4K for my machine (C3000).

All this fixes partly the boot, but there are still quite some caching
problems left.  Examples are e.g. the symbios logic driver which is
failing:

sym0: <896> rev 0x7 at pci 0000:00:0f.0 irq 69
sym0: PA-RISC Firmware, ID 7, Fast-40, SE, parity checking
CACHE TEST FAILED: DMA error (dstat=0x81).sym0: CACHE INCORRECTLY CONFIGURED.

and the tulip network driver which doesn't seem to work correctly
either:

Sending BOOTP requests .net eth0: Setting full-duplex based on MII#1
link partner capability of 05e1
..... timed out!

Beside those kernel fixes glibc will need fixes too to be able to handle
>4K page sizes.

Signed-off-by: Helge Deller <deller@gmx.de>
parisc: document the parisc gateway page

Include some documentation about how the parisc gateway page technically
works and how it is used from userspace.

James Bottomley is the original author of this description and it was
copied here out of an email thread from Apr 12 2013 titled:
man2 : syscall.2 : document syscall calling conventions

CC: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Helge Deller <deller@gmx.de>
parisc: fix NATIVE set up in build

The ifeq operator does not accept globs, so this little bit of code will
never match (unless uname literally prints out "parsic*").  Rewrite to
use a pattern matching operator so that NATIVE is set to 1 on parisc.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Helge Deller <deller@gmx.de>
parisc: use long branch in fork_like macro

The "b" branch instruction used in the fork_like macro only can handle
17-bit pc-relative offsets.
This fails with an out of range offset with some .config files.
Rewrite to use the "be" instruction which
can branch to any address in a space.

Signed-off-by: John David Anglin  <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
parisc: implement atomic64_dec_if_positive()

Signed-off-by: Helge Deller <deller@gmx.de>
block_device_operations->release() should return void

The value passed is 0 in all but "it can never happen" cases (and those
only in a couple of drivers) *and* it would've been lost on the way
out anyway, even if something tried to pass something meaningful.
Just don't bother.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
make blkdev_put() return void

same story as with the previous patches - note that return
value of blkdev_close() is lost, since there's nowhere the
caller (__fput()) could return it to.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>