Commit 00fc0e0d ("alpha: move exports to actual definitions") also
removed the exports of the math emulator hooks, which are defined in C
code.  In case anyone cares about the option of CONFIG_MATHEMU=m, add
exports next to those definitions.  Also add a MODULE_LICENSE.

Fixes: 00fc0e0d ("alpha: move exports to actual definitions")
Signed-off-by: NBen Hutchings <ben@decadent.org.uk>
Signed-off-by: NMatt Turner <mattst88@gmail.com>

Add <asm/asm-prototypes.h> so that genksyms knows the types of
these symbols and can generate CRCs for them.

Fixes: 00fc0e0d ("alpha: move exports to actual definitions")
Signed-off-by: NBen Hutchings <ben@decadent.org.uk>
Signed-off-by: NMatt Turner <mattst88@gmail.com>

Remove old, dead Kconfig options (in order appearing in this commit):
 - IP_NF_QUEUE: commit 3dd6664f ("netfilter: remove unused "config
   IP_NF_QUEUE"");
 - AUTOFS_FS: commit 561c5cf9 ("staging: Remove autofs3");
Signed-off-by: NKrzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: NMatt Turner <mattst88@gmail.com>

Use kobj_to_dev() instead of open-coding it.
Signed-off-by: NGeliang Tang <geliangtang@163.com>
Signed-off-by: NMatt Turner <mattst88@gmail.com>

Remove unneeded variables and assignments.

While we are here, fix the coding style of SMC37c669_read_config():
  - replace whitespaces at the start of lines with tabs
  - remove unneeded whitespaces around parentheses
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: NMatt Turner <mattst88@gmail.com>

Replace explicit computation of vma page count by a call to
vma_pages()
Signed-off-by: NShyam Saini <mayhs11saini@gmail.com>
Signed-off-by: NMatt Turner <mattst88@gmail.com>

We check that "member" is in bounds for the first line, but we also use
it on the next line without checking which is a mistake.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NMatt Turner <mattst88@gmail.com>

The alpha/marvel code currently implements an irq_chip for handling
interrupts; due to how irq_chip handling is done, it's necessary for the
irq_chip methods to be invoked from hardirq context, even on a a
real-time kernel.  Because the spinlock_t type becomes a "sleeping"
spinlock w/ RT kernels, it is not suitable to be used with irq_chips.

A quick audit of the operations under the lock reveal that they do only
minimal, bounded work, and are therefore safe to do under a raw spinlock.
Signed-off-by: NJulia Cartwright <julia@ni.com>
Signed-off-by: NMatt Turner <mattst88@gmail.com>

__NR_sys_epoll_create and friends are alpha-specific
while __NR_epoll_create is a generic name for other
arches.

Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: linux-alpha@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: NSergei Trofimovich <slyfox@gentoo.org>
Signed-off-by: NMatt Turner <mattst88@gmail.com>

The arch uses a verbatim copy of the asm-generic version and does not
add any own implemntations to the header, so use asm-generic/fb.h
instead of duplicating code.
Signed-off-by: NTobias Klauser <tklauser@distanz.ch>
Signed-off-by: NMatt Turner <mattst88@gmail.com>

Andrei Vagin reported a CRIU regression and bisected it back to:

  90f6225f ("x86/idt: Move IST stack based traps to table init")

This table init conversion loses the system-gate property of X86_TRAP_BP
and erroneously moves it from DPL3 to DPL0.

Fix it.
Reported-by: NAndrei Vagin <avagin@virtuozzo.com>
Signed-off-by: NIngo Molnar <mingo@kernel.org>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: dvlasenk@redhat.com
Cc: linux-tip-commits@vger.kernel.org
Cc: peterz@infradead.org
Cc: brgerst@gmail.com
Cc: rostedt@goodmis.org
Cc: bp@alien8.de
Cc: luto@kernel.org
Cc: jpoimboe@redhat.com
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: torvalds@linux-foundation.org
Cc: tip-bot for Jacob Shin <tipbot@zytor.com>
Link: http://lkml.kernel.org/r/20170901082630.xvyi5bwk6etmppqc@gmail.com

Calls to mmu_notifier_invalidate_page() were replaced by calls to
mmu_notifier_invalidate_range() and are now bracketed by calls to
mmu_notifier_invalidate_range_start()/end()

Remove now useless invalidate_page callback.

Changed since v1 (Linus Torvalds)
    - remove now useless kvm_arch_mmu_notifier_invalidate_page()
Signed-off-by: NJérôme Glisse <jglisse@redhat.com>
Tested-by: NMike Galbraith <efault@gmx.de>
Tested-by: NAdam Borowski <kilobyte@angband.pl>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: kvm@vger.kernel.org
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Calls to mmu_notifier_invalidate_page() were replaced by calls to
mmu_notifier_invalidate_range() and now are bracketed by calls to
mmu_notifier_invalidate_range_start()/end()

Remove now useless invalidate_page callback.
Signed-off-by: NJérôme Glisse <jglisse@redhat.com>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Alistair Popple <alistair@popple.id.au>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Change the m32r flat_put_addr_at_rp() function to return int and
always return 0.

The microblaze function already returned 0 so just change its
function return type from void to int.

Seven (7) other arch-es already have this function as returning
an int type result.

Fixes: 468138d7 (binfmt_flat: flat_{get,put}_addr_from_rp()
	should be able to fail)
Signed-off-by: NRandy Dunlap <rdunlap@infradead.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

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

When running as Xen pv-guest the exception frame on the stack contains
%r11 and %rcx additional to the other data pushed by the processor.

Instead of having a paravirt op being called for each exception type
prepend the Xen specific code to each exception entry. When running as
Xen pv-guest just use the exception entry with prepended instructions,
otherwise use the entry without the Xen specific code.

[ tglx: Merged through tip to avoid ugly merge conflict ]
Signed-off-by: NJuergen Gross <jgross@suse.com>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: xen-devel@lists.xenproject.org
Cc: boris.ostrovsky@oracle.com
Cc: luto@amacapital.net
Link: http://lkml.kernel.org/r/20170831174249.26853-1-jg@pfupf.net

The seperation of the EISA init missed to include linux/io.h which breaks
the build with some special configurations.
Reported-by: NIngo Molnar <mingo@kernel.org>
Fixes: f7eaf6e0 ("x86/boot: Move EISA setup to a separate file")
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

LS1046a includes 3 MSI controllers.
Each controller supports 128 interrupts.
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NMinghuan Lian <Minghuan.Lian@nxp.com>
Signed-off-by: NHou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>

In order to maximize the use of MSI, a PCIe controller will share
all MSI controllers. The patch changes "msi-parent" to refer to all
MSI controller dts nodes.
Signed-off-by: NMinghuan Lian <Minghuan.Lian@nxp.com>
Signed-off-by: NHou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>

In order to maximize the use of MSI, a PCIe controller will share
all MSI controllers. The patch changes msi-parent to refer to all
MSI controller dts nodes.
Signed-off-by: NMinghuan Lian <Minghuan.Lian@nxp.com>
Signed-off-by: NHou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>

"1" should be replaced by "l". This is a typo.
The patch is to fix it.
Signed-off-by: NMinghuan Lian <Minghuan.Lian@nxp.com>
Signed-off-by: NHou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>

"1" should be replaced by "l". This is a typo.
The patch is to fix it.
Signed-off-by: NMinghuan Lian <Minghuan.Lian@nxp.com>
Signed-off-by: NHou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>

When masking/unmasking a doorbell interrupt, it is necessary
to issue an invalidation to the corresponding redistributor.
We use the DirectLPI feature by writting directly to the corresponding
redistributor.
Reviewed-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>

V{PEND,PROP}BASER being 64bit registers, they need some ad-hoc
accessors on 32bit, specially given that VPENDBASER contains
a Valid bit, making the access a bit convoluted.
Reviewed-by: NThomas Gleixner <tglx@linutronix.de>
Reviewed-by: NEric Auger <eric.auger@redhat.com>
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>

Commit 87e81786 ("x86/idt: Move early IDT setup out of 32-bit asm")
switched early_ignore_irq to use ENTRY. ENTRY aligns the code, so there
is no need for one more ALIGN right before the function.

And add one \n after the function to separate it from the data.
Signed-off-by: NJiri Slaby <jslaby@suse.cz>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Link: http://lkml.kernel.org/r/20170831121653.28917-1-jslaby@suse.cz

A 31-bit compat process can force a BUG_ON in crst_table_upgrade
with specific, invalid mmap calls, e.g.

   mmap((void*) 0x7fff8000, 0x10000, 3, 32, -1, 0)

The arch_get_unmapped_area[_topdown] functions miss an if condition
in the decision to do a page table upgrade.

Fixes: 9b11c791 ("s390/mm: simplify arch_get_unmapped_area[_topdown]")
Cc: <stable@vger.kernel.org>  # v4.12+
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

The mm->context.asce field of a new process is not set up correctly
in case of a fork with a 5 level page table.
Add the missing case to init_new_context().

Fixes: 1aea9b3f ("s390/mm: implement 5 level pages tables")
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

x86/boot/KASLR: Work around firmware bugs by excluding EFI_BOOT_SERVICES_* and EFI_LOADER_* from KASLR's choice

There's a potential bug in how we select the KASLR kernel address n
the early boot code.

The KASLR boot code currently chooses the kernel image's physical memory
location from E820_TYPE_RAM regions by walking over all e820 entries.

E820_TYPE_RAM includes EFI_BOOT_SERVICES_CODE and EFI_BOOT_SERVICES_DATA
as well, so those regions can end up hosting the kernel image. According to
the UEFI spec, all memory regions marked as EfiBootServicesCode and
EfiBootServicesData are available as free memory after the first call
to ExitBootServices(). I.e. so such regions should be usable for the
kernel, per spec.

In real life however, we have workarounds for broken x86 firmware,
where we keep such regions reserved until SetVirtualAddressMap() is done.

See the following code in should_map_region():

	static bool should_map_region(efi_memory_desc_t *md)
	{
		...
		/*
		 * Map boot services regions as a workaround for buggy
		 * firmware that accesses them even when they shouldn't.
		 *
		 * See efi_{reserve,free}_boot_services().
		 */
		if (md->type =3D=3D EFI_BOOT_SERVICES_CODE ||
			md->type =3D=3D EFI_BOOT_SERVICES_DATA)
				return false;

This workaround suppressed a boot crash, but potential issues still
remain because no one prevents the regions from overlapping with kernel
image by KASLR.

So let's make sure that EFI_BOOT_SERVICES_{CODE|DATA} regions are never
chosen as kernel memory for the workaround to work fine.

Furthermore, EFI_LOADER_{CODE|DATA} regions are also excluded because
they can be used after ExitBootServices() as defined in EFI spec.

As a result, we choose kernel address only from EFI_CONVENTIONAL_MEMORY
which is the only memory type we know to be safely free.
Signed-off-by: NNaoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: Junichi Nomura <j-nomura@ce.jp.nec.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Garnier <thgarnie@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: fanc.fnst@cn.fujitsu.com
Cc: izumi.taku@jp.fujitsu.com
Link: http://lkml.kernel.org/r/20170828074444.GC23181@hori1.linux.bs1.fc.nec.co.jp
[ Rewrote/fixed/clarified the changelog and the in code comments. ]
Signed-off-by: NIngo Molnar <mingo@kernel.org>

When booting 4.13 on a VirtualBox VM on a Skylake host the following
error shows up in the logs:

 [    0.000000] [Firmware Bug]: TSC_DEADLINE disabled due to Errata;
                please update microcode to version: 0xb2 (or later)

This is caused by apic_check_deadline_errata() only checking CPU model
and not the X86_FEATURE_TSC_DEADLINE_TIMER flag (which VirtualBox does
NOT export to the guest), combined with VirtualBox not exporting the
micro-code version to the guest.

This commit adds a check for X86_FEATURE_TSC_DEADLINE_TIMER to
apic_check_deadline_errata(), silencing this error on VirtualBox VMs.
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Acked-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Frank Mehnert <frank.mehnert@oracle.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Michael Thayer <michael.thayer@oracle.com>
Cc: Michal Necasek <michal.necasek@oracle.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Fixes: bd9240a1 ("x86/apic: Add TSC_DEADLINE quirk due to errata")
Link: http://lkml.kernel.org/r/20170830105811.27539-1-hdegoede@redhat.comSigned-off-by: NIngo Molnar <mingo@kernel.org>

There's a subtle bug in how some of the paravirt guest code handles
page table freeing on x86:

On x86 software page table walkers depend on the fact that remote TLB flush
does an IPI: walk is performed lockless but with interrupts disabled and in
case the page table is freed the freeing CPU will get blocked as remote TLB
flush is required. On other architectures which don't require an IPI to do
remote TLB flush we have an RCU-based mechanism (see
include/asm-generic/tlb.h for more details).

In virtualized environments we may want to override the ->flush_tlb_others
callback in pv_mmu_ops and use a hypercall asking the hypervisor to do a
remote TLB flush for us. This breaks the assumption about IPIs. Xen PV has
been doing this for years and the upcoming remote TLB flush for Hyper-V will
do it too.

This is not safe, as software page table walkers may step on an already
freed page.

Fix the bug by enabling the RCU-based page table freeing mechanism,
CONFIG_HAVE_RCU_TABLE_FREE=y.

Testing with kernbench and mmap/munmap microbenchmarks, and neither showed
any noticeable performance impact.
Suggested-by: NPeter Zijlstra <peterz@infradead.org>
Signed-off-by: NVitaly Kuznetsov <vkuznets@redhat.com>
Acked-by: NPeter Zijlstra <peterz@infradead.org>
Acked-by: NJuergen Gross <jgross@suse.com>
Acked-by: NKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Jork Loeser <Jork.Loeser@microsoft.com>
Cc: KY Srinivasan <kys@microsoft.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: xen-devel@lists.xenproject.org
Link: http://lkml.kernel.org/r/20170828082251.5562-1-vkuznets@redhat.com
[ Rewrote/fixed/clarified the changelog. ]
Signed-off-by: NIngo Molnar <mingo@kernel.org>

The lack of newlines in preceding format strings is a clear indication
that these were meant to be continuations of one another, and indeed
output ends up quite a bit more compact (and readable) that way.

Switch other plain printk()-s in the function instances to pr_info(),
as requested.
Signed-off-by: NJan Beulich <jbeulich@suse.com>
Acked-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/59A7D72B0200007800175E4E@prv-mh.provo.novell.comSigned-off-by: NIngo Molnar <mingo@kernel.org>

Stephen reported a merge conflict with the XEN tree. That also shows that the
IDT cleanup forgot to remove the now unused trace_{trap} defines.

Remove them.
Reported-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Juergen Gross <jgross@suse.com>

The Armada AP806 has 20 pins, and therefore 20 GPIOs (from 0 to 19
included) and not 19 pins. Therefore, we fix the Device Tree
description for the GPIO controller.

Before this patch:

$ cat /sys/kernel/debug/pinctrl/f06f4000.system-controller:pinctrl/gpio-ranges
GPIO ranges handled:
0: mvebu-gpio GPIOS [0 - 19] PINS [0 - 19]
0: f06f4000.system-controller:gpio GPIOS [0 - 18] PINS [0 - 18]

After this patch:

$ cat /sys/kernel/debug/pinctrl/f06f4000.system-controller:pinctrl/gpio-ranges
GPIO ranges handled:
0: mvebu-gpio GPIOS [0 - 19] PINS [0 - 19]
0: f06f4000.system-controller:gpio GPIOS [0 - 19] PINS [0 - 19]

Fixes: 63dac0f4 ("arm64: dts: marvell: add gpio support for Armada 7K/8K")
Signed-off-by: NThomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: NGregory CLEMENT <gregory.clement@free-electrons.com>

This fixes compiler errors in perf such as:

tests/attr.c: In function 'store_event':
tests/attr.c:66:27: error: format '%llu' expects argument of type 'long long unsigned int', but argument 6 has type '__u64 {aka long unsigned int}' [-Werror=format=]
  snprintf(path, PATH_MAX, "%s/event-%d-%llu-%d", dir,
                           ^
Signed-off-by: NBen Hutchings <ben@decadent.org.uk>
Tested-by: NMichael Cree <mcree@orcon.net.nz>
Cc: stable@vger.kernel.org
Signed-off-by: NMatt Turner <mattst88@gmail.com>

Commit 3cc2dac5 ("drivers/video/fbdev/atyfb: Replace MTRR UC hole
with strong UC") introduces calls to ioremap_wc and ioremap_uc. This
causes build failures with alpha:allmodconfig. Map the missing functions
to ioremap_nocache.

Fixes: 3cc2dac5 ("drivers/video/fbdev/atyfb:
        Replace MTRR UC hole with strong UC")
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Luis R. Rodriguez <mcgrof@suse.com>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NMatt Turner <mattst88@gmail.com>

Signed-off-by: NMatt Turner <mattst88@gmail.com>

Since commit 71810db2 (modversions: treat symbol CRCs
as 32 bit quantities) R_ALPHA_REFLONG relocations can be required
to load modules. This implements it.
Tested-by: NBob Tracy <rct@gherkin.frus.com>
Reviewed-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NMichael Cree <mcree@orcon.net.nz>
Signed-off-by: NMatt Turner <mattst88@gmail.com>

Patch 85250231 introduced a typo.

That said, the identity AND insns added by that patch are more
clearly written as MOV.  At the same time, re-schedule the ev6
version so that the first dispatch can execute in parallel.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NMatt Turner <mattst88@gmail.com>

There are direct branches between {str*cpy,str*cat} and stx*cpy.
Ensure the branches are within range by merging these objects.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NMatt Turner <mattst88@gmail.com>

Signed-off-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NMatt Turner <mattst88@gmail.com>