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Xiangyu Lu 80bb3ef109 ARM: 8027/1: fix do_div() bug in big-endian systems 
In big-endian systems, "%1" get the most significant part of the value, cause the instruction to get the wrong result.

When viewing ftrace record in big-endian ARM systems, we found that
the timestamp errors:

swapper-0   [001] 1325.970000:   0:120:R ==> [001]    16:120:R events/1
events/1-16 [001] 1325.970000:   16:120:S ==> [001]    0:120:R swapper
swapper-0   [000] 1325.1000000:  0:120:R   + [000]    15:120:R events/0
swapper-0   [000] 1325.1000000:  0:120:R ==> [000]    15:120:R events/0
swapper-0   [000] 1326.030000:   0:120:R   + [000]  1150:120:R sshd
swapper-0   [000] 1326.030000:   0:120:R ==> [000]  1150:120:R sshd

When viewed ftrace records, it will call the do_div(n, base) function, which achieved arch/arm/include/asm/div64.h in. When n = 10000000, base = 1000000, in do_div(n, base) will execute "umull %Q0, %R0, %1, %Q2".

Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Reviewed-by: Nicolas Pitre <nico@linaro.org>
Cc: <stable@vger.kernel.org> # 2.6.20+
Signed-off-by: Alex Wu <wuquanming@huawei.com>
Signed-off-by: Xiangyu Lu <luxiangyu@huawei.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-04-22 22:23:57 +01:00
..
hardware
ARM: MM: Add DT binding for Feroceon L2 cache
2014-02-22 20:43:49 +00:00
mach
ARM: implement basic NX support for kernel lowmem mappings
2013-12-11 09:53:16 +00:00
xen
xen/grant-table: Refactor gnttab_[un]map_refs to avoid m2p_override
2014-03-18 14:40:19 +00:00
arch_timer.h
ARM: arch_timer: add support to configure and enable event stream
2013-09-26 09:47:26 +01:00
asm-offsets.h
…
assembler.h
ARM: 8018/1: Add {inc,dec}_preempt_count asm macros
2014-04-09 13:08:08 +01:00
atomic.h
ARM: 7983/1: atomics: implement a better __atomic_add_unless for v6+
2014-02-25 11:35:08 +00:00
barrier.h
arch: Introduce smp_load_acquire(), smp_store_release()
2014-01-12 10:37:17 +01:00
bitops.h
ARM: fix ffs/fls implementations to match x86
2014-01-13 23:34:56 +00:00
bL_switcher.h
ARM: bL_switcher: Add query interface to discover CPU affinities
2013-09-23 18:47:31 -04:00
bug.h
ARM: Correct BUG() assembly to ensure it is endian-agnostic
2013-10-19 20:46:35 +01:00
bugs.h
…
cache.h
…
cacheflush.h
ARM: 7957/1: add DSB after icache flush in __flush_icache_all()
2014-02-17 23:09:00 +00:00
cachetype.h
ARM: 7062/1: cache: detect PIPT I-cache using CTR
2011-10-17 09:13:41 +01:00
checksum.h
ARM: fix csum_tcpudp_magic() miscompilation
2013-12-29 12:32:41 +00:00
clkdev.h
clk: Add common __clk_get(), __clk_put() implementations
2013-12-04 17:19:44 +01:00
cmpxchg.h
ARM: 7984/1: prefetch: add prefetchw invocations for barriered atomics
2014-02-25 11:30:20 +00:00
compiler.h
Disintegrate asm/system.h for ARM
2012-03-28 18:30:01 +01:00
cp15.h
Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm
2013-07-03 09:46:29 -07:00
cpu.h
ARM: kernel: add MIDR to per-CPU information data
2012-11-19 14:51:11 +00:00
cpuidle.h
cpuidle: Add common time keeping and irq enabling
2012-03-21 01:59:40 -04:00
cputype.h
ARM: 8015/1: Add cpu_is_pj4 to distinguish PJ4 because it has some differences with V7
2014-04-08 17:55:27 +01:00
cti.h
ARM: coresight: common definition for (OS) Lock Access Register key value
2013-01-10 21:13:05 +00:00
delay.h
ARM: 7685/1: delay: use private ticks_per_jiffy field for timer-based delay ops
2013-04-03 16:45:50 +01:00
device.h
ARM: dma-mapping: Add macro to_dma_iommu_mapping()
2013-02-25 15:30:41 +01:00
div64.h
ARM: 8027/1: fix do_div() bug in big-endian systems
2014-04-22 22:23:57 +01:00
dma-contiguous.h
drivers: dma-contiguous: clean source code and prepare for device tree
2013-08-27 09:18:29 +02:00
dma-iommu.h
arm: dma-mapping: remove order parameter from arm_iommu_create_mapping()
2014-02-28 11:55:18 +01:00
dma-mapping.h
Features:
2013-11-15 13:34:37 +09:00
dma.h
mm/memblock: add memblock memory allocation apis
2014-01-21 16:19:46 -08:00
domain.h
ARM: fix set_domain() macro
2012-07-05 09:50:55 +01:00
ecard.h
ARM: io: ecard: move ioaddr() inside __ecard_address
2011-08-17 08:44:16 +01:00
edac.h
ARM: 7201/1: add EDAC atomic_scrub function
2011-12-11 08:35:50 +00:00
elf.h
Move the EM_ARM and EM_AARCH64 definitions to uapi/linux/elf-em.h
2013-09-02 16:35:50 +01:00
entry-macro-multi.S
ARM: gic: consolidate PPI handling
2011-10-23 13:32:29 +01:00
exception.h
ARM: 7115/4: move __exception and friends to asm/exception.h
2011-10-17 09:02:44 +01:00
fb.h
…
fiq.h
ARM: 6940/1: fiq: Briefly document driver responsibilities for suspend/resume
2011-05-26 10:31:06 +01:00
firmware.h
ARM: firmware: add prepare_idle() operation
2014-02-18 13:46:42 -07:00
fixmap.h
…
flat.h
ARM: binfmt_flat: unused variable 'persistent'
2012-10-09 20:29:06 +02:00
floppy.h
ARM: 7996/1: floppy.h: remove deprecated IRQF_DISABLED
2014-03-12 10:32:29 +00:00
fncpy.h
ARM: 6640/1: Thumb-2: Symbol manipulation macros for function body copying
2011-01-27 11:48:58 +00:00
fpstate.h
Fix common misspellings
2011-03-31 11:26:23 -03:00
ftrace.h
…
futex.h
ARM: 7984/1: prefetch: add prefetchw invocations for barriered atomics
2014-02-25 11:30:20 +00:00
glue-cache.h
Merge branch 'for-next' of git://git.pengutronix.de/git/ukl/linux into devel-stable
2013-05-22 10:52:24 +01:00
glue-df.h
ARM: Add base support for ARMv7-M
2013-04-17 21:38:10 +02:00
glue-pf.h
ARM: move cache/processor/fault glue to separate include files
2011-02-12 11:52:21 +00:00
glue-proc.h
ARM SoC specific changes
2013-07-02 13:43:38 -07:00
glue.h
Fix common misspellings
2011-03-31 11:26:23 -03:00
gpio.h
ARM: make mach/gpio.h headers optional
2012-09-14 09:21:59 -05:00
hardirq.h
Merge branch 'devel-stable' into for-next
2013-11-12 10:58:59 +00:00
highmem.h
ARM: 7684/1: errata: Workaround for Cortex-A15 erratum 798181 (TLBI/DSB operations)
2013-04-03 16:45:49 +01:00
hugetlb-3level.h
ARM: mm: HugeTLB support for LPAE systems.
2013-06-04 16:52:37 +01:00
hugetlb.h
ARM: mm: HugeTLB support for LPAE systems.
2013-06-04 16:52:37 +01:00
hw_breakpoint.h
ARM: 7948/1: hw_breakpoint: Add ARMv8 support
2014-02-10 11:48:05 +00:00
hw_irq.h
arm: dove: Use proper irq accessor functions
2011-03-29 14:47:57 +02:00
hwcap.h
ARM: 7981/1: add support for AT_HWCAP2 ELF auxv entry
2014-02-25 11:40:48 +00:00
hypervisor.h
arm: initial Xen support
2012-09-14 13:53:39 +00:00
ide.h
…
idmap.h
ARM: KVM: move to a KVM provided HYP idmap
2013-04-28 22:23:08 -07:00
io.h
ARM: 7930/1: Introduce atomic MMIO modify
2014-01-28 14:06:25 +00:00
irq.h
arm: Move the set_handle_irq and handle_arch_irq declarations to asm/irq.h
2013-03-26 16:11:20 +00:00
irqflags.h
ARM: Add base support for ARMv7-M
2013-04-17 21:38:10 +02:00
jump_label.h
ARM: 7989/1: Delete asm/system.h
2014-02-25 11:33:37 +00:00
Kbuild
locking/mcs: Allow architecture specific asm files to be used for contended case
2014-02-09 21:18:52 +01:00
kexec.h
[ARM] add machine-specific hook to machine_kexec
2011-03-03 16:26:55 -05:00
kgdb.h
ARM: kdgb: use <asm/opcodes.h> for data to be assembled as intruction
2013-10-19 20:46:35 +01:00
kmap_types.h
arm: remove km_type definitions
2012-07-24 15:27:28 +08:00
kprobes.h
ARM: Make arch_specific_insn a define for new arch_probes_insn structure
2014-03-18 16:39:40 -04:00
kvm_arm.h
ARM: KVM: trap VM system registers until MMU and caches are ON
2014-03-03 01:15:24 +00:00
kvm_asm.h
ARM: KVM: add world-switch for AMAIR{0,1}
2014-03-03 01:15:24 +00:00
kvm_coproc.h
KVM: ARM: User space API for getting/setting co-proc registers
2013-01-23 13:29:14 -05:00
kvm_emulate.h
A handful of fixes for KVM/arm64:
2013-11-11 12:05:20 +01:00
kvm_host.h
ARM: KVM: introduce per-vcpu HYP Configuration Register
2014-03-03 01:15:23 +00:00
kvm_mmio.h
KVM: ARM: Handle I/O aborts
2013-01-23 13:29:17 -05:00
kvm_mmu.h
ARM: KVM: force cache clean on page fault when caches are off
2014-03-03 01:15:22 +00:00
kvm_psci.h
KVM: ARM: Power State Coordination Interface implementation
2013-01-23 13:29:18 -05:00
limits.h
…
linkage.h
…
mach-types.h
…
mc146818rtc.h
ARM: mc146818rtc: remove unnecessary include of mach/irqs.h
2012-01-25 20:37:45 -06:00
mcpm.h
Merge branch 'devel-stable' into for-next
2013-11-12 10:58:59 +00:00
memblock.h
ARM: constify machine_desc structure uses
2013-07-26 14:55:59 +01:00
memory.h
Merge branches 'amba', 'fixes', 'misc', 'mmci', 'unstable/omap-dma' and 'unstable/sa11x0' into for-next
2014-04-04 00:33:32 +01:00
mmu_context.h
ARM: 7790/1: Fix deferred mm switch on VIVT processors
2013-07-26 12:02:09 +01:00
mmu.h
ARM: tlb: ASID macro should give 32bit result for BE correct operation
2013-10-19 20:46:36 +01:00
module.h
ARM: 7829/1: Add ".text.unlikely" and ".text.hot" to arm unwind tables
2013-09-02 13:49:47 +01:00
mpu.h
ARM: mpu: protect the vectors page with an MPU region
2013-06-17 15:13:18 +01:00
mtd-xip.h
…
mutex.h
ARM: 7495/1: mutex: use generic atomic_dec-based implementation for ARMv6+
2012-08-25 09:22:31 +01:00
neon.h
ARM: add support for kernel mode NEON
2013-07-08 22:08:51 +01:00
nwflash.h
…
opcodes-sec.h
ARM: opcodes: add opcodes definitions for ARM security extensions
2013-01-10 21:10:20 +00:00
opcodes-virt.h
ARM: opcodes: add __ERET/__MSR_ELR_HYP instruction encoding
2012-09-19 08:32:49 +01:00
opcodes.h
ARM: opcodes: add missing include of linux/linkage.h
2013-01-10 21:10:20 +00:00
outercache.h
ARM: move outer_cache declaration out of ifdef
2013-08-22 20:48:41 -05:00
page-nommu.h
…
page.h
ARM: make vectors page inaccessible from userspace
2013-08-01 14:31:58 +01:00
pci.h
ARM: PCI: add legacy IDE IRQ implementation
2013-12-29 12:44:10 +00:00
percpu.h
ARM: 7747/1: pcpu: ensure __my_cpu_offset cannot be re-ordered across barrier()
2013-06-05 23:35:56 +01:00
perf_event.h
ARM: 7584/1: perf: fix link error when CONFIG_HW_PERF_EVENTS is not selected
2012-11-23 13:01:30 +00:00
pgalloc.h
arm: handle pgtable_page_ctor() fail
2013-11-15 09:32:16 +09:00
pgtable-2level-hwdef.h
ARM: 7077/1: LPAE: Use a mask for physical addresses in page table entries
2011-10-06 15:40:06 +01:00
pgtable-2level-types.h
ARM: 7076/1: LPAE: Add (pte|pmd)val_t type definitions as u32
2011-10-06 15:40:05 +01:00
pgtable-2level.h
ARM: 7954/1: mm: remove remaining domain support from ARMv6
2014-02-10 11:48:13 +00:00
pgtable-3level-hwdef.h
Merge branch 'for-rmk/lpae' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into devel-stable
2013-06-18 20:11:32 +01:00
pgtable-3level-types.h
ARM: LPAE: Introduce the 3-level page table format definitions
2011-12-08 10:30:39 +00:00
pgtable-3level.h
ARM: 7950/1: mm: Fix stage-2 device memory attributes
2014-02-10 11:44:05 +00:00
pgtable-hwdef.h
ARM: LPAE: Introduce the 3-level page table format definitions
2011-12-08 10:30:39 +00:00
pgtable-nommu.h
consolidate io_remap_pfn_range definitions
2013-06-29 12:46:35 +04:00
pgtable.h
ARM: 7985/1: mm: implement pte_accessible for faulting mappings
2014-02-25 11:32:40 +00:00
pmu.h
ARM: perf: add hook for event index clearing
2014-02-21 11:11:08 +00:00
probes.h
ARM: Make arch_specific_insn a define for new arch_probes_insn structure
2014-03-18 16:39:40 -04:00
proc-fns.h
Merge branch 'for-rmk/lpae' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into devel-stable
2013-06-18 20:11:32 +01:00
processor.h
ARM: prefetch: add support for prefetchw using pldw on SMP ARMv7+ CPUs
2013-09-30 16:42:55 +01:00
procinfo.h
…
prom.h
of: remove HAVE_ARCH_DEVTREE_FIXUPS
2013-10-09 20:04:08 -05:00
psci.h
arm: introduce psci_smp_ops
2013-05-21 14:24:11 +00:00
ptrace.h
Merge branch 'uprobes-v7' of git://git.linaro.org/people/dave.long/linux into devel-stable
2014-03-19 20:15:46 +00:00
scatterlist.h
ARM: Allow SoCs to enable scatterlist chaining
2011-06-02 11:16:22 +01:00
seccomp.h
…
setup.h
ARM: 7863/1: Let arm_add_memory() always use 64-bit arguments
2013-10-29 11:06:28 +00:00
shmparam.h
…
signal.h
arm: switch to generic old sigaction()
2013-02-03 18:15:47 -05:00
smp_plat.h
ARM: 7807/1: kexec: validate CPU hotplug support
2013-08-13 20:23:18 +01:00
smp_scu.h
ARM: scu: provide inline dummy functions when SCU is not present
2013-07-04 05:10:51 -07:00
smp_twd.h
ARM: smp_twd: convert to use CLKSRC_OF init
2013-03-11 08:42:08 -05:00
smp.h
ARM: SoC specific changes
2014-04-05 14:19:54 -07:00
sparsemem.h
…
spinlock_types.h
ARM: locks: prefetch the destination word for write prior to strex
2013-09-30 16:42:55 +01:00
spinlock.h
ARM: 7955/1: spinlock: ensure we have a compiler barrier before sev
2014-02-10 11:44:50 +00:00
stackprotector.h
…
stacktrace.h
…
string.h
…
suspend.h
ARM: kernel: implement stack pointer save array through MPIDR hashing
2013-06-20 11:24:11 +01:00
swab.h
UAPI: (Scripted) Disintegrate arch/arm/include/asm
2012-10-12 13:05:52 +01:00
switch_to.h
ARM: spinlock: use inner-shareable dsb variant prior to sev instruction
2013-08-12 12:25:45 +01:00
sync_bitops.h
ARM: 7989/1: Delete asm/system.h
2014-02-25 11:33:37 +00:00
syscall.h
audit: use uapi/linux/audit.h for AUDIT_ARCH declarations
2014-03-20 10:11:59 -04:00
system_info.h
ARM: Add base support for ARMv7-M
2013-04-17 21:38:10 +02:00
system_misc.h
reboot: arm: change reboot_mode to use enum reboot_mode
2013-07-09 10:33:29 -07:00
tcm.h
ARM: 6985/1: export functions to determine the presence of I/DTCM
2011-07-06 20:49:45 +01:00
therm.h
…
thread_info.h
ARM: add uprobes support
2014-03-18 16:39:40 -04:00
thread_notify.h
ARM: 6867/1: Introduce THREAD_NOTIFY_COPY for copy_thread() hooks
2011-04-10 21:13:36 +01:00
timex.h
ARM: drop <mach/timex.h> for !ARCH_MULTIPLATFORM, too
2013-12-20 17:17:16 +01:00
tlb.h
Fix TLB gather virtual address range invalidation corner cases
2013-08-16 08:52:46 -07:00
tlbflush.h
ARM: 7855/1: Add check for Cortex-A15 errata 798181 ECO
2013-10-29 11:06:13 +00:00
tls.h
ARM: 7735/2: Preserve the user r/w register TPIDRURW on context switch and fork
2013-06-24 15:21:59 +01:00
topology.h
sched: Remove unused mc_capable() and smt_capable()
2014-03-11 12:05:45 +01:00
traps.h
ARM: earlier initialization of vectors page
2012-01-23 10:24:11 +00:00
trusted_foundations.h
ARM: trusted_foundations: fallback when TF support is missing
2014-02-18 13:46:32 -07:00
types.h
ARM: 7822/1: add workaround for ambiguous C99 stdint.h types
2013-08-25 17:09:46 +01:00
uaccess.h
ARM: 7951/1: uaccess: use CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
2014-02-10 11:48:10 +00:00
ucontext.h
Fix common misspellings
2011-03-31 11:26:23 -03:00
unified.h
ARM: smp_on_up: move inline asm ALT_SMP patching macro out of spinlock.h
2013-09-30 16:42:55 +01:00
unistd.h
ARM: 8007/1: Remove extraneous kcmp syscall ignore
2014-03-19 20:20:37 +00:00
unwind.h
ARM: 7187/1: fix unwinding for XIP kernels
2011-12-06 11:16:13 +00:00
uprobes.h
ARM: add uprobes support
2014-03-18 16:39:40 -04:00
user.h
ARM: 6798/1: aout-core: zero thread debug registers in a.out core dump
2011-03-10 15:16:29 +00:00
v7m.h
ARM: 7828/1: ARMv7-M: implement restart routine common to all v7-M machines
2013-09-02 13:49:29 +01:00
vfp.h
…
vfpmacros.h
ARM: 7566/1: vfp: fix save and restore when running on pre-VFPv3 and CONFIG_VFPv3 set
2012-10-29 10:04:05 +00:00
vga.h
ARM: set vga memory base at run-time
2011-07-12 11:19:29 -05:00
virt.h
ARM: 7787/1: virt: ensure visibility of __boot_cpu_mode
2013-07-26 12:01:17 +01:00
word-at-a-time.h
ARM: 7927/1: dcache: select DCACHE_WORD_ACCESS for big-endian CPUs
2013-12-29 12:46:50 +00:00
xor.h
ARM: crypto: add NEON accelerated XOR implementation
2013-07-08 22:09:06 +01:00