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Commit af3e4fd37a "ARM: 6859/1: Add writethrough dcache support for
ARM926EJS processor" broke Thumb2 compilation by omitting to maintain
the wide encoding for the added branch instructions which made the
ARM926EJ-S record smaller than expected, breaking the record walk code.
Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Cc: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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If the DT physical address is zero, this is equivalent to no DT.
Especially when the actual RAM physical address is not located at zero,
the result of phys_to_virt() would point to la-la-land and crash the
kernel, which crash is completely silent this early during boot.
Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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The IO accessors for U300 were using u32 rather than the nominal
void __iomem * type, rectify this by properly defining the
virtual base for statically mapped peripherals to be
void __iomem *. Requires fixing a field in struct clk as well.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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This reverts commit 45b95235b0ac86cef2ad4480b0618b8778847479.
Will Deacon reports that:
In 52af9c6c ("ARM: 6943/1: mm: use TTBR1 instead of reserved context ID")
I updated the ASID rollover code to use only the kernel page tables
whilst updating the ASID.
Unfortunately, the code to restore the user page tables was part of a
later patch which isn't yet in mainline, so this leaves the code
quite broken.
We're also in the process of eliminating __ARCH_WANT_INTERRUPTS_ON_CTXSW
from ARM, so lets revert these until we can properly sort out what we're
doing with the context switching.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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This reverts commit 52af9c6cd863fe37d1103035ec7ee22ac1296458.
Will Deacon reports that:
In 52af9c6c ("ARM: 6943/1: mm: use TTBR1 instead of reserved context ID")
I updated the ASID rollover code to use only the kernel page tables
whilst updating the ASID.
Unfortunately, the code to restore the user page tables was part of a
later patch which isn't yet in mainline, so this leaves the code
quite broken.
We're also in the process of eliminating __ARCH_WANT_INTERRUPTS_ON_CTXSW
from ARM, so lets revert these until we can properly sort out what we're
doing with the ARM context switching.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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The patch adds one-line asm-generic files in arch/unicore32/include/asm/Kbuild
Also, remove the old implementation in arch/unicore32/Makefile
see commit from Sam Ravnborg <d8ecc5cd8e227bc318513b5306ae88a474b8886d>
kbuild: asm-generic support
Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Acked-by: Arnd Bergmann <arnd@arndb.de>
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The patch changes PERCPU to PERCPU_SECTION
see commit from Tejun Heo <0415b00d175e0d8945e6785aad21b5f157976ce0>
percpu: Always align percpu output section to PAGE_SIZE
Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Acked-by: Tejun Heo <tj@kernel.org>
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Rename debug_defconfig to unicore32_defconfig, which is a minimal config for
PKUnity-v3 (130nm) SoC board.
Also, add KBUILD_DEFCONFIG to use 'make defconfig'.
Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Acked-by: Arnd Bergmann <arnd@arndb.de>
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U-boot will load the kernel image to 48M physical memory address.
The patch changes it to the correct address, though it's PIC codes.
Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Acked-by: Arnd Bergmann <arnd@arndb.de>
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The patch moves rtc driver for PKUnity-v3 SoC from arch/unicore32/kernel/
to drivers/rtc/, with renaming it to rtc-puv3.c.
Also, Kconfig, Makefile, and MAINTAINERS are modified correspondingly.
Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Acked-by: Arnd Bergmann <arnd@arndb.de>
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When using 64K pages with a separate cpio rootfs, U-Boot will align
the rootfs on a 4K page boundary. When the memory is reserved, and
subsequent early memblock_alloc is called, it will allocate memory
between the 64K page alignment and reserved memory. When the reserved
memory is subsequently freed, it is done so by pages, causing the
early memblock_alloc requests to be re-used, which in my case, caused
the device-tree to be clobbered.
This patch forces the reserved memory for initrd to be kernel page
aligned, and will move the device tree if it overlaps with the range
extension of initrd. This patch will also consolidate the identical
function free_initrd_mem() from mm/init_32.c, init_64.c to mm/mem.c,
and adds the same range extension when freeing initrd. free_initrd_mem()
is also moved to the __init section.
Many thanks to Milton Miller for his input on this patch.
[BenH: Fixed build without CONFIG_BLK_DEV_INITRD]
Signed-off-by: Dave Carroll <dcarroll@astekcorp.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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dtc was moved and .gitignores have been added to the new location. So, we can
delete the old, forgotten ones.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
* 'stable/bug.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
xen: off by one errors in multicalls.c
xen: use the trigger info we already have to choose the irq handler
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git://git.kernel.org/pub/scm/linux/kernel/git/rric/oprofile into perf/urgent
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After a newly plugged CPU sets the cpu_online bit it enables
interrupts and goes idle. The cpu which brought up the new cpu waits
for the cpu_online bit and when it observes it, it sets the cpu_active
bit for this cpu. The cpu_active bit is the relevant one for the
scheduler to consider the cpu as a viable target.
With forced threaded interrupt handlers which imply forced threaded
softirqs we observed the following race:
cpu 0 cpu 1
bringup(cpu1);
set_cpu_online(smp_processor_id(), true);
local_irq_enable();
while (!cpu_online(cpu1));
timer_interrupt()
-> wake_up(softirq_thread_cpu1);
-> enqueue_on(softirq_thread_cpu1, cpu0);
^^^^
cpu_notify(CPU_ONLINE, cpu1);
-> sched_cpu_active(cpu1)
-> set_cpu_active((cpu1, true);
When an interrupt happens before the cpu_active bit is set by the cpu
which brought up the newly onlined cpu, then the scheduler refuses to
enqueue the woken thread which is bound to that newly onlined cpu on
that newly onlined cpu due to the not yet set cpu_active bit and
selects a fallback runqueue. Not really an expected and desirable
behaviour.
So far this has only been observed with forced hard/softirq threading,
but in theory this could happen without forced threaded hard/softirqs
as well. It's probably unobservable as it would take a massive
interrupt storm on the newly onlined cpu which causes the softirq loop
to wake up the softirq thread and an even longer delay of the cpu
which waits for the cpu_online bit.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Peter Zijlstra <peterz@infradead.org>
Cc: stable@kernel.org # 2.6.39
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Make the PCM device structures used in devices.c
and devices-da8xx.c static as they are used only
in the respective files.
This was found when trying to build a single image
for DaVinci and DA8x devices using runtime P2V support.
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
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The code which does the chained handler setup was overwriting
chip_data.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Holger Hans Peter Freyther <holger@freyther.de>
Signed-off-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
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gUSA special cases r15 for part of its login/out sequence, meaning that
any parameters need to be explicitly prohibited from accidentally being
assigned that particular register, and the compiler ultimately needs to
use a temporary instead.
Certain configurations have begun generating code paths that do indeed
get allocated r15, resulting in immediate corruption of the exchanged
value. This was observed in (amongst others) exit_mm() code generation
where the xchg_u32 call was immediately corrupting a structure address.
As this is a general gUSA restriction, the rest of the users likewise
need to be updated to ensure sensible constraints.
References: https://bugzilla.stlinux.com/show_bug.cgi?id=11229
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Reviewed-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86/amd-iommu: Fix boot crash with hidden PCI devices
x86/amd-iommu: Use only per-device dma_ops
x86/amd-iommu: Fix 3 possible endless loops
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* 'kvm-updates/3.0' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: Initialize kvm before registering the mmu notifier
KVM: x86: use proper port value when checking io instruction permission
KVM: add missing void __user * cast to access_ok() call
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_sdata needs to be declared in the linker script now as of commit
a2d063ac216c ("extable, core_kernel_data(): Make sure all archs define
_sdata")
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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die_if_no_fixup() shouldn't use get_user() as it doesn't call set_fs() to
indicate that it wants to probe a kernel address. Instead it should use
probe_kernel_read().
This fixes the problem of gdb seeing SIGILL rather than SIGTRAP when hitting
the KGDB special breakpoint upon SysRq+g being seen. The problem was that
die_if_no_fixup() was failing to read the opcode of the instruction that caused
the exception, and thus not fixing up the exception.
This caused gdb to get a S04 response to the $? request in its remote protocol
rather than S05 - which would then cause it to continue with $C04 rather than
$c in an attempt to pass the signal onto the inferior process. The kernel,
however, does not support $Cnn, and so objects by returning an E22 response,
indicating an error. gdb does not expect this and prints:
warning: Remote failure reply: E22
and then returns to the gdb command prompt unable to continue.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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One of the kernel debugger cacheflush variants escaped proper testing. Two of
the labels are wrong, being derived from the code that was copied to construct
the variant.
The first label results in the following assembler message:
AS arch/mn10300/mm/cache-dbg-flush-by-reg.o
arch/mn10300/mm/cache-dbg-flush-by-reg.S: Assembler messages:
arch/mn10300/mm/cache-dbg-flush-by-reg.S:123: Error: symbol `debugger_local_cache_flushinv_no_dcache' is already defined
And the second label results in the following linker message:
arch/mn10300/mm/built-in.o:(.text+0x1d39): undefined reference to `mn10300_local_icache_inv_range_reg_end'
arch/mn10300/mm/built-in.o:(.text+0x1d39): relocation truncated to fit: R_MN10300_PCREL16 against undefined symbol `mn10300_local_icache_inv_range_reg_end'
To test this file the following configuration pieces must be set:
CONFIG_AM34=y
CONFIG_MN10300_CACHE_WBACK=y
CONFIG_MN10300_DEBUGGER_CACHE_FLUSH_BY_REG=y
CONFIG_MN10300_CACHE_MANAGE_BY_REG=y
CONFIG_AM34_HAS_CACHE_SNOOP=n
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6:
[S390] fix kvm defines for 31 bit compile
[S390] use generic RCU page-table freeing code
[S390] qdio: Split SBAL entry flags
[S390] kvm-s390: fix stfle facilities numbers >=64
[S390] kvm-s390: Fix host crash on misbehaving guests
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git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6: (21 commits)
ARM: OMAP4: MMC: increase delay for pbias
arm: omap2plus: move NAND_BLOCK_SIZE out of boards
omap4: hwmod: Enable the keypad
omap3: Free Beagle rev gpios when they are read, so others can read them later
arm: omap3: beagle: Ensure msecure is mux'd to be able to set the RTC
omap: rx51: Don't power up speaker amplifier at bootup
omap: rx51: Set regulator V28_A always on
ARM: OMAP4: MMC: no regulator off during probe for eMMC
arm: omap2plus: fix ads7846 pendown gpio request
ARM: OMAP2: Add missing iounmap in omap4430_phy_init
ARM: omap4: Pass core and wakeup mux tables to omap4_mux_init
ARM: omap2+: mux: Allow board mux settings to be NULL
OMAP4: fix return value of omap4_l3_init
OMAP: iovmm: fix SW flags passed by user
arch/arm/mach-omap1/dma.c: Invert calls to platform_device_put and platform_device_del
OMAP2+: mux: fix compilation warnings
OMAP: SRAM: Fix warning: format '%08lx' expects type 'long unsigned int'
arm: omap3: cm-t3517: fix section mismatch warning
OMAP2+: Fix 9 section mismatch(es) warnings from mach-omap2/built-in.o
ARM: OMAP2: Add missing include of linux/gpio.h
...
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Semicolons are not necessary after switch/while/for/if braces
so remove them.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Some devices that can generate interrupts are connected directly to the
CPU through the bootbus on sun4d. This patch allows IRQs to be allocated
for such devices. The information used for allocating interrupts for
sbus devices are present at the corresponding SBI node. For bootbus
devices this information is present in the bootbus node.
Signed-off-by: Kjetil Oftedal <oftedal@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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interrupts correctly
During the introduction of genirq on sparc32 bugs were introduced in
the interrupt handler for sun4d. The interrupts handler checks the status
of the various sbus interfaces in the system and generates a virtual
interrupt, based upon the location of the interrupt source. This lookup
was broken by restructuring the code in such a way that index and shift
operations were performed prior to comparing this against the values
read from the interrupt controllers.
This could cause the handler to loop eternally as the interrupt source
could be skipped before any check was performed. Additionally
sun4d_encode_irq performs shifting internally, so it should not be performed
twice.
In sun4d_unmask interrupts were not correctly acknowledged, as the
corresponding bit it the interrupt mask was not actually cleared.
Signed-off-by: Kjetil Oftedal <oftedal@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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sun4d_build_device_irq was called without a valid platform_device when
the system timer was initialized on sun4d systems. This caused a NULL
pointer crash.
Josip Rodin suggested that the current sun4d_build_device_irq should be
split into two functions. So that the timer initialization could skip
the slot and sbus interface detection code in sun4d_build_device_irq, as
this does not make sence due to the timer interrupts not being generated
from a device located on sbus.
Signed-off-by: Kjetil Oftedal <oftedal@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch fixes the way of comparison for handling of two or more
clock sources for UART.
For example, if just only one clock source is defined even though
there are two clock sources for UART, the serial driver does not
set proper clock up. Of course, it is problem.
So this patch changes the condition of comparison to avoid useless
setup clock and adds a flag 'NO_NEED_CHECK_CLKSRC' which means
selection of source clock is not required.
In addition, since the Exynos4210 has only one clock source for UART
this patch adds the flag into its common_init_uarts().
Signed-off-by: Boojin Kim <boojin.kim@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Some PCIe cards ship with a PCI-PCIe bridge which is not
visible as a PCI device in Linux. But the device-id of the
bridge is present in the IOMMU tables which causes a boot
crash in the IOMMU driver.
This patch fixes by removing these cards from the IOMMU
handling. This is a pure -stable fix, a real fix to handle
this situation appriatly will follow for the next merge
window.
Cc: stable@kernel.org # > 2.6.32
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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After commit 4d27e9dcff00a6425d779b065ec8892e4f391661 (PM: Make power
domain callbacks take precedence over subsystem ones), the power
domain callbacks need to call the driver callbacks instead of relying
on the default subsystem (in this case, platform_bus) to handle the
driver callbacks.
Validated on 3430/n900, 3530/Overo.
Signed-off-by: Kevin Hilman <khilman@ti.com>
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WARNING: arch/arm/mach-omap2/built-in.o(.text+0x423c): Section mismatch in reference from the function pm_dbg_regset_init() to the function .init.text:pm_dbg_init()
The function pm_dbg_regset_init() references
the function __init pm_dbg_init().
This is often because pm_dbg_regset_init lacks a __init
annotation or the annotation of pm_dbg_init is wrong.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Kevin Hilman <khilman@ti.com>
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Unfortunatly there are systems where the AMD IOMMU does not
cover all devices. This breaks with the current driver as it
initializes the global dma_ops variable. This patch limits
the AMD IOMMU to the devices listed in the IVRS table fixing
DMA for devices not covered by the IOMMU.
Cc: stable@kernel.org
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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The driver contains several loops counting on an u16 value
where the exit-condition is checked against variables that
can have values up to 0xffff. In this case the loops will
never exit. This patch fixed 3 such loops.
Cc: stable@kernel.org
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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KVM is not available for 31 bit but the KVM defines cause warnings:
arch/s390/include/asm/pgtable.h: In function 'ptep_test_and_clear_user_dirty':
arch/s390/include/asm/pgtable.h:817: warning: integer constant is too large for 'unsigned long' type
arch/s390/include/asm/pgtable.h:818: warning: integer constant is too large for 'unsigned long' type
arch/s390/include/asm/pgtable.h: In function 'ptep_test_and_clear_user_young':
arch/s390/include/asm/pgtable.h:837: warning: integer constant is too large for 'unsigned long' type
arch/s390/include/asm/pgtable.h:838: warning: integer constant is too large for 'unsigned long' type
Add 31 bit versions of the KVM defines to remove the warnings.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Replace the s390 specific rcu page-table freeing code with the
generic variant. This requires to duplicate the definition for the
struct mmu_table_batch as s390 does not use the generic tlb flush
code.
While we are at it remove the restriction that page table fragments
can not be reused after a single fragment has been freed with rcu
and split out allocation and freeing of page tables with pgstes.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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The qdio SBAL entry flag is made-up of four different values that are
independent of one another. Some of the bits are reserved by the
hardware and should not be changed by qdio. Currently all four values
are overwritten since the SBAL entry flag is defined as an u32.
Split the SBAL entry flag into four u8's as defined by the hardware
and don't touch the reserved bits.
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Currently KVM masks out the known good facilities only for the first
double word, but passed the 2nd double word without filtering. This
breaks some code on newer systems:
[ 0.593966] ------------[ cut here ]------------
[ 0.594086] WARNING: at arch/s390/oprofile/hwsampler.c:696
[ 0.594213] Modules linked in:
[ 0.594321] Modules linked in:
[ 0.594439] CPU: 0 Not tainted 3.0.0-rc1 #46
[ 0.594564] Process swapper (pid: 1, task: 00000001effa8038, ksp: 00000001effafab8)
[ 0.594735] Krnl PSW : 0704100180000000 00000000004ab89a (hwsampler_setup+0x75a/0x7b8)
[ 0.594910] R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:0 CC:1 PM:0 EA:3
[ 0.595120] Krnl GPRS: ffffffff00000000 00000000ffffffea ffffffffffffffea 00000000004a98f8
[ 0.595351] 00000000004aa002 0000000000000001 000000000080e720 000000000088b9f8
[ 0.595522] 000000000080d3e8 0000000000000000 0000000000000000 000000000080e464
[ 0.595725] 0000000000000000 00000000005db198 00000000004ab3a2 00000001effafd98
[ 0.595901] Krnl Code: 00000000004ab88c: c0e5000673ca brasl %r14,57a020
[ 0.596071] 00000000004ab892: a7f4fc77 brc 15,4ab180
[ 0.596276] 00000000004ab896: a7f40001 brc 15,4ab898
[ 0.596454] >00000000004ab89a: a7c8ffa1 lhi %r12,-95
[ 0.596657] 00000000004ab89e: a7f4fc71 brc 15,4ab180
[ 0.596854] 00000000004ab8a2: a7f40001 brc 15,4ab8a4
[ 0.597029] 00000000004ab8a6: a7f4ff22 brc 15,4ab6ea
[ 0.597230] 00000000004ab8aa: c0200011009a larl %r2,6cb9de
[ 0.597441] Call Trace:
[ 0.597511] ([<00000000004ab3a2>] hwsampler_setup+0x262/0x7b8)
[ 0.597676] [<0000000000875812>] oprofile_arch_init+0x32/0xd0
[ 0.597834] [<0000000000875788>] oprofile_init+0x28/0x74
[ 0.597991] [<00000000001001be>] do_one_initcall+0x3a/0x170
[ 0.598151] [<000000000084fa22>] kernel_init+0x142/0x1ec
[ 0.598314] [<000000000057db16>] kernel_thread_starter+0x6/0xc
[ 0.598468] [<000000000057db10>] kernel_thread_starter+0x0/0xc
[ 0.598606] Last Breaking-Event-Address:
[ 0.598707] [<00000000004ab896>] hwsampler_setup+0x756/0x7b8
[ 0.598863] ---[ end trace ce3179037f4e3e5b ]---
So lets also mask the 2nd double word. Facilites 66,76,76,77 should be fine.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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commit 9ff4cfb3fcfd48b49fdd9be7381b3be340853aa4 ([S390] kvm-390: Let
kernel exit SIE instruction on work) fixed a problem of commit
commit cd3b70f5d4d82f85d1e1d6e822f38ae098cf7c72 ([S390] virtualization
aware cpu measurement) but uncovered another one.
If a kvm guest accesses guest real memory that doesnt exist, the
page fault handler calls the sie hook, which then rewrites
the return psw from sie_inst to either sie_exit or sie_reenter.
On return, the page fault handler will then detect the wrong access
as a kernel fault causing a kernel oops in sie_reenter or sie_exit.
We have to add these two addresses to the exception table to allow
graceful exits.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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This patch fixes the lockdep warning of "unannotated irqs-off"[1].
After entering __irq_usr, arm core will disable interrupt automatically,
but __irq_usr does not annotate the irq disable, so lockdep may complain
the warning if it has chance to check this in irq handler.
This patch adds trace_hardirqs_off in __irq_usr before entering irq_handler
to handle the irq, also calls ret_to_user_from_irq to avoid calling
disable_irq again.
This is also a fix for irq off tracer.
[1], lockdep warning log of "unannotated irqs-off"
[ 13.804687] ------------[ cut here ]------------
[ 13.809570] WARNING: at kernel/lockdep.c:3335 check_flags+0x78/0x1d0()
[ 13.816467] Modules linked in:
[ 13.819732] Backtrace:
[ 13.822357] [<c01cb42c>] (dump_backtrace+0x0/0x100) from [<c06abb14>] (dump_stack+0x20/0x24)
[ 13.831268] r6:c07d8c2c r5:00000d07 r4:00000000 r3:00000000
[ 13.837280] [<c06abaf4>] (dump_stack+0x0/0x24) from [<c01ffc04>] (warn_slowpath_common+0x5c/0x74)
[ 13.846649] [<c01ffba8>] (warn_slowpath_common+0x0/0x74) from [<c01ffc48>] (warn_slowpath_null+0x2c/0x34)
[ 13.856781] r8:00000000 r7:00000000 r6:c18b8194 r5:60000093 r4:ef182000
[ 13.863708] r3:00000009
[ 13.866485] [<c01ffc1c>] (warn_slowpath_null+0x0/0x34) from [<c0237d84>] (check_flags+0x78/0x1d0)
[ 13.875823] [<c0237d0c>] (check_flags+0x0/0x1d0) from [<c023afc8>] (lock_acquire+0x4c/0x150)
[ 13.884704] [<c023af7c>] (lock_acquire+0x0/0x150) from [<c06af638>] (_raw_spin_lock+0x4c/0x84)
[ 13.893798] [<c06af5ec>] (_raw_spin_lock+0x0/0x84) from [<c01f9a44>] (sched_ttwu_pending+0x58/0x8c)
[ 13.903320] r6:ef92d040 r5:00000003 r4:c18b8180
[ 13.908233] [<c01f99ec>] (sched_ttwu_pending+0x0/0x8c) from [<c01f9a90>] (scheduler_ipi+0x18/0x1c)
[ 13.917663] r6:ef183fb0 r5:00000003 r4:00000000 r3:00000001
[ 13.923645] [<c01f9a78>] (scheduler_ipi+0x0/0x1c) from [<c01bc458>] (do_IPI+0x9c/0xfc)
[ 13.932006] [<c01bc3bc>] (do_IPI+0x0/0xfc) from [<c06b0888>] (__irq_usr+0x48/0xe0)
[ 13.939971] Exception stack(0xef183fb0 to 0xef183ff8)
[ 13.945281] 3fa0: ffffffc3 0001500c 00000001 0001500c
[ 13.953948] 3fc0: 00000050 400b45f0 400d9000 00000000 00000001 400d9600 6474e552 bea05b3c
[ 13.962585] 3fe0: 400d96c0 bea059c0 400b6574 400b65d8 20000010 ffffffff
[ 13.969573] r6:00000403 r5:fa240100 r4:ffffffff r3:20000010
[ 13.975585] ---[ end trace efc4896ab0fb62cb ]---
[ 13.980468] possible reason: unannotated irqs-off.
[ 13.985534] irq event stamp: 1610
[ 13.989044] hardirqs last enabled at (1610): [<c01c703c>] no_work_pending+0x8/0x2c
[ 13.997131] hardirqs last disabled at (1609): [<c01c7024>] ret_slow_syscall+0xc/0x1c
[ 14.005371] softirqs last enabled at (0): [<c01fe5e4>] copy_process+0x2cc/0xa24
[ 14.013183] softirqs last disabled at (0): [< (null)>] (null)
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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The "Virtual memory kernel layout" message at startup already prints
.text and .data. Print .bss too.
Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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gas used to accept (and ignore?) .size directives which referred to
undefined symbols, as these do. In binutils 2.21 these are treated
as fatal errors.
The issue in proc-arm7tdmi.S was also fixed independently by Peter
Chubb.
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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The introduction of the mmio timer accidentally referenced the
old clocksource struct which does not exist anymore. Fix this by
using a simple string instead.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Commit 7ff550de99141cbd3be0129d563cc4554fdde9f6 breaks vexpress booting. The
v2m clock table needs to be setup in init_early before the timer
initialization occurs.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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SH-2A is unable to combine the kernel and libgcc objects due to
fundamental disagreements over FDPIC settings. As the kernel already
contains all of the libgcc bits broken out, there's not much need to
bother with the linking anymore, as everything can already be derived
from the lib dir.
This simply plugs in the necessary bits to ensure that everything is
built uniformly, enabling us to wean the compressed build off of explicit
libgcc linking.
Reported-by: Phil Edworthy <phil.edworthy@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Commit f6511935f42 moved the permission check for io instructions
to the ->check_perm callback. It failed to copy the port value from RDX
register for string and "in,out ax,dx" instructions.
Fix it by reading RDX register at decode stage when appropriate.
Fixes FC8.32 installation.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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Check the MX51 chip revision in run-time so that the correct SDMA firmware can
be loaded.
While at it also remove the silicon revision from the sdma_script_start_addrs
structure name for MX51. All the MX51 revisions share the same SDMA start addresses.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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