Move the mid-layer's ->queuecommand() invocation from being locked
with the host lock to being unlocked to facilitate speeding up the
critical path for drivers who don't need this lock taken anyway.

The patch below presents a simple SCSI host lock push-down as an
equivalent transformation.  No locking or other behavior should change
with this patch.  All existing bugs and locking orders are preserved.

Additionally, add one parameter to queuecommand,
	struct Scsi_Host *
and remove one parameter from queuecommand,
	void (*done)(struct scsi_cmnd *)

Scsi_Host* is a convenient pointer that most host drivers need anyway,
and 'done' is redundant to struct scsi_cmnd->scsi_done.

Minimal code disturbance was attempted with this change.  Most drivers
needed only two one-line modifications for their host lock push-down.
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>
Acked-by: NJames Bottomley <James.Bottomley@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Tested-by: NTony SIM <chinyeow.sim.xt@renesas.com>
Tested-by: NTAKEI Mitsuharu <takei.andr@gmail.com>
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This patch fixes followng build warnings.
warning: (ARCH_S5P64X0 && <choice> || ARCH_S5PC100 && <choice> ||
          ARCH_S5PV210 && <choice> || ARCH_S5PV310 && <choice>)
         selects HAVE_S3C_RTC which has unmet direct dependencies (RTC_CLASS)
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

This patch fixes following warnings.
warning: (ARCH_S3C2410 && <choice> || ARCH_S3C64XX && <choice> ||
          ARCH_S5P64X0 && <choice> || ARCH_S5PC100 && <choice> ||
          ARCH_S5PV210 && <choice> || ARCH_S5PV310 && <choice>)
         selects HAVE_S3C2410_I2C which has unmet direct dependencies (I2C)
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Fix build warnings
warning: (ARCH_S3C64XX && <choice> && WATCHDOG || ARCH_S5P64X0 && <choice> && WATCHDOG ||
          ARCH_S5P6442 && <choice> && WATCHDOG || ARCH_S5PC100 && <choice> ||
          ARCH_S5PV210 && <choice> || ARCH_S5PV310 && <choice> || MACH_SMDK6410 && ARCH_S3C64XX)
         selects HAVE_S3C2410_WATCHDOG which has unmet direct dependencies (WATCHDOG)
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
[kgene.kim@samsung.com: Added fix same warning(mach-s3c64xx/Kconfig)]
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Both commits 0a3d763f ("ptrace: cleanup arch_ptrace() on um") and
9b05a69e ("ptrace: change signature of arch_ptrace()") broke the um
build.  This patch fixes the issues.

0a3d763f introduced the undeclared variable "datavp".  The patch seems
completely untested.  :-(

9b05a69e changed arch_ptrace()'s signature but did not update
um/include/asm/ptrace-generic.h.
Signed-off-by: NRichard Weinberger <richard@nod.at>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Jeff Dike <jdike@addtoit.com>
Tested-by: NWill Newton <will.newton@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Software generated interrupts (SGI) are used for IPIs by the kernel.
While previous revisions of the GIC hardware were specified not to
implement enable bits for SGIs, more recent hardware is now permitted
to implement these bits in a per-CPU banked register.

The priority registers for the PPI and SGIs are also per-CPU banked
registers, so ensure that these are also appropriately initialized.
Reported-by: NScott Valentine <svalentine@concentris-systems.com>
Acked-by: NAbhijeet Dharmapurikar <adharmap@codeaurora.org>
Acked-by: NCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Some BIOSes provide PCI host bridge windows that overlap, e.g.,

    pci_root PNP0A03:00: host bridge window [mem 0xb0000000-0xffffffff]
    pci_root PNP0A03:00: host bridge window [mem 0xafffffff-0xdfffffff]
    pci_root PNP0A03:00: host bridge window [mem 0xf0000000-0xffffffff]

If we simply insert these as children of iomem_resource, the second window
fails because it conflicts with the first, and the third is inserted as a
child of the first, i.e.,

    b0000000-ffffffff PCI Bus 0000:00
      f0000000-ffffffff PCI Bus 0000:00

When we claim PCI device resources, this can cause collisions like this
if we put them in the first window:

    pci 0000:00:01.0: address space collision: [mem 0xff300000-0xff4fffff] conflicts with PCI Bus 0000:00 [mem 0xf0000000-0xffffffff]

Host bridge windows are top-level resources by definition, so it doesn't
make sense to make the third window a child of the first.  This patch
coalesces any host bridge windows that overlap.  For the example above,
the result is this single window:

    pci_root PNP0A03:00: host bridge window [mem 0xafffffff-0xffffffff]

This fixes a 2.6.34 regression.

Reference: https://bugzilla.kernel.org/show_bug.cgi?id=17011Reported-and-tested-by: NAnisse Astier <anisse@astier.eu>
Reported-and-tested-by: NPramod Dematagoda <pmd.lotr.gandalf@gmail.com>
Signed-off-by: NBjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

We already deliberately setup a 1-1 P2M for the region up to 1M in
order to allow code which assumes this region is already mapped to
work without having to convert everything to ioremap.

Domain 0 should not return any apparently unused memory regions
(reserved or otherwise) in this region to Xen since the e820 may not
accurately reflect what the BIOS has stashed in this region.
Signed-off-by: NIan Campbell <ian.campbell@citrix.com>
Signed-off-by: NJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Also, don't be picky about the location, which incidentally fixes the
build since MEMBLOCK_REAL_LIMIT is gone on 2.6.37.

arch/arm/plat-omap/devices.c: In function 'omap_dsp_reserve_sdram_memblock':
arch/arm/plat-omap/devices.c:287: error: 'MEMBLOCK_REAL_LIMIT'
    undeclared (first use in this function)
Signed-off-by: NFelipe Contreras <felipe.contreras@gmail.com>
Acked-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NOmar Ramirez Luna <omar.ramirez@ti.com>

Jasper suggested we use the zeroing capability of the allocators
instead of calling memset ourselves. Add node affinity while we're at
it.
Reported-by: NJesper Juhl <jj@chaosbits.net>
Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

In commit bde28b84, I made the assumption that CONFIG_SMP is always set
for the quad-core ct-ca9x4 platform. As it turns out, people who aren't
using the SMP goodness are confronted with a build failure.

This patch fixes this issue by ensure that twd_base is only set if
local timers are being used (and therefore SMP support is configured).
Reported-by: NNicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: NWill Deacon <will.deacon@arm.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Commit 92580d64e16402762e2acc3022f065397c780425
("x86: pvclock: Move scale_delta into common header")
forgot to remove scale_delta.
Signed-off-by: NKusanagi Kouichi <slash@ac.auone-net.jp>
Cc: Zachary Amsden <zamsden@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Glauber Costa <glommer@redhat.com>
LKML-Reference: <20101105110444.BAF6D6FC03B@msa105.auone-net.jp>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Remove the second <asm/atomic.h> inclusion.
Signed-off-by: NJesper Juhl <jj@chaosbits.net>
LKML-Reference: <alpine.LNX.2.00.1011072253360.26247@swampdragon.chaosbits.net>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

check_enable_amd_mmconf_dmi() gets called only for the BSP,
hence everything hanging off of it can be __init*.
Signed-off-by: NJan Beulich <jbeulich@novell.com>
Acked-by: NYinghai Lu <yinghai@kernel.org>
LKML-Reference: <4CD2DE1E0200007800020990@vpn.id2.novell.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

A new version of the SGI UV hub node controller is being
developed. A few of the MMRs (control registers) that exist on
the current hub no longer exist on the new hub. Fortunately,
there are alternate MMRs that are are functionally equivalent
and that exist on both hubs.

This patch changes the UV code to use MMRs that exist in BOTH
versions of the hub node controller.
Signed-off-by: NJack Steiner <steiner@sgi.com>
LKML-Reference: <20101106204056.GA27584@sgi.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Analog to git commit 737480a0
fix the return address of subsequent kretprobes when multiple
kretprobes are set on the same function.
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

Execute the kprobe exception and fault handler with interrupts disabled.
To disable the interrupts only while a single step is in progress is not
good enough, a kprobe from interrupt context while another kprobe is
handled can confuse the internal house keeping.
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

Provide the devmem_is_allowed() routine to restrict access to
kernel memory from userspace.
Set the CONFIG_STRICT_DEVMEM config option to switch on checking.
Signed-off-by: NHendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

The check for the _PAGE_RO bit in get_user_pages_fast for write==1 is
the wrong way around. It must not be set for the fast path.
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

The [vk][cmz]alloc(_node) family of functions return void
pointers which it's completely unnecessary/pointless to cast to
other pointer types since that happens implicitly.

This patch removes such casts from arch/x86.
Signed-off-by: NJesper Juhl <jj@chaosbits.net>
Cc: trivial@kernel.org
Cc: amd64-microcode@amd64.org
Cc: Andreas Herrmann <andreas.herrmann3@amd.com>
LKML-Reference: <alpine.LNX.2.00.1011082310220.23697@swampdragon.chaosbits.net>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

native_apic_msr_read() and x2apic_enabled() use rdmsr(msr, low, high),
but only use the low part.

gcc4.6 complains about this:
.../apic.h:144:11: warning: variable 'high' set but not used [-Wunused-but-set-variable]

rdmsr() is just a wrapper around rdmsrl() which splits the 64bit value
into low and high, so using rdmsrl() directly solves this.

[tglx: Changed the variables to u64 as suggested by Cyrill. It's less
       confusing and has no code impact as this is 64bit only anyway.
       Massaged changelog as well. ]
Signed-off-by: NAndi Kleen <ak@linux.intel.com>
Cc: x86@kernel.org
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
LKML-Reference: <1289251229-19589-1-git-send-email-andi@firstfloor.org>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

Get rid of the following warning:

arch/arm/mach-omap1/devices.c: In function 'omap_init_wdt':
arch/arm/mach-omap1/devices.c:298: warning: 'return' with
no value, in function returning non-void

while at that, also change:

platform_device_register();
return 0;

into:

return platform_device_register();
Signed-off-by: NFelipe Balbi <balbi@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

Stanse found that xen_setup_msi_irqs leaks memory when
xen_allocate_pirq fails. Free the memory in that fail path.
Signed-off-by: NJiri Slaby <jslaby@suse.cz>
Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: xen-devel@lists.xensource.com
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org

This makes the loader and bootenv partitions read-only under MTD for the
on-board NOR flash.
Signed-off-by: NYusuke Goda <yusuke.goda.sx@renesas.com>
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Signed-off-by: NTony SIM <chinyeow.sim.xt@renesas.com>
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

These clocks are currently only used inside one .c file and are not
declared in any headers, therefore having them global is useless.
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Message isn't printed by WARN_ON.
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Add kernel-doc documentation for the EP93xx DMA memory to
peripheral/peripheral to memory API.
Signed-off-by: NRyan Mallon <ryan@bluewatersys.com>
Acked-by: NMika Westerberg <mika.westerberg@iki.fi>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

The old apcs-gnu ABI doesn't guarantee that double words are allocated
to registers with even alignment, causing the 64-bit exclusive memory
operations to be rejected by the assembler.

This patch requires that CONFIG_AEABI is set in order to use the native
atomic operations and falls back to the generic (spinlock) code otherwise.
Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: NWill Deacon <will.deacon@arm.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

armv7_pmnc_counter_has_overflowed can return uninitialised data
if an invalid counter is specified.

This patch fixes the code to return 0 in this case, which squashes
the compiler warning from GCC 4.5.
Signed-off-by: NWill Deacon <will.deacon@arm.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

When unwinding stack frames we must take care not to unwind
areas of memory that lie outside of the known extent of the stack.

This patch fixes an incorrect calculation of the stack base where
THREAD_SIZE is added to the stack pointer after it has already
been aligned to this value. Since the ALIGN macro performs this
addition internally, we end up overshooting the base by 8k.
Acked-by: NCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: NWill Deacon <will.deacon@arm.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

An out by one bug meant that the DMA coherent allocator was aligning
to one more bit than it should, causing it to run out of available
memory quicker.  Fix this.
Reported-by: NPetr Štetiar <ynezz@true.cz>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

#include <media/omap1_camera.h> directive is required to
compile the dependant boards (board-ams-delta for now).
Signed-off-by: NJanusz Krzysztofik <jkrzyszt@tis.icnet.pl>
[tony@atomide.com: updated comments]
Signed-off-by: NTony Lindgren <tony@atomide.com>

Flush the writes to IRQSTATUS_L0 register in the DMA interrupt handler by reading the register
directly after write. This prevents the spurious DMA interrupts noted when using VDD_OPP 1
Signed-off-by: NMathias Nyman <mathias.nyman@nokia.com>
Acked-by: NSantosh Shilimkar <Santosh.shilimkar@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

This patch fixes the following error:

>regulator: VMMC1: 1850 <--> 3150 mV at 3000 mV normal standby
>twl_reg twl_reg.6: can't register VMMC1, -22
>twl_reg: probe of twl_reg.6 failed with error -22
Signed-off-by: NThomas Weber <weber@corscience.de>
Signed-off-by: NTony Lindgren <tony@atomide.com>

Wrong MPP configuration would cause <cpu>_mpp_conf loop infinitely
because the mpp list iterator would not be incremented.
Signed-off-by: NMike Rapoport <mike@compulab.co.il>
Signed-off-by: NNicolas Pitre <nico@fluxnic.net>

The type was IORESOURCE_IO which is not what is expected by
plat_nand_probe(). This device has not worked since 2d098a72
("mtd: plat_nand: request memory resource before doing ioremap").
Signed-off-by: NMichael Spang <mspang@csclub.uwaterloo.ca>
Signed-off-by: NNicolas Pitre <nico@fluxnic.net>

This was preventing the guest from setting any bits in the
hardware MSR which aren't forced on, such as MSR[SPE].
Signed-off-by: NScott Wood <scottwood@freescale.com>
Signed-off-by: NAlexander Graf <agraf@suse.de>