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2011-03-31Fix common misspellingsLucas De Marchi1-1/+1
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-03-30Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds8-45/+67
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (65 commits) ARM: 6826/1: Merge v6 and v7 DEBUG_LL DCC support ARM: 6838/1: etm: fix section mismatch warning ARM: 6837/1: remove unused pci_fixup_prpmc1100 ARM: 6836/1: kprobes/fix emulation of LDR/STR instruction when Rn == PC Fix the broken build for Marvell Dove platform. ARM: 6835/1: perf: ensure overflows aren't missed due to IRQ latency ARM: 6834/1: perf: reset counters on all CPUs during initialisation ARM: 6833/1: perf: add required isbs() to ARMv7 backend ARM: 6825/1: kernel/sleep.S: fix Thumb2 compilation issues ARM: 6807/1: realview: Fix secondary GIC initialisation for EB with MPCore tile arm: mach-mx3: pcm043: add write-protect and card-detect for SD1 eukrea_mbimxsd51: add SD Card detect eukrea_mbimxsd25-baseboard: add SD card detect mx3/eukrea_mbimxsd-baseboard: add SD card detect support mx3/eukrea_mbimxsd-baseboard: fix gpio request ARM: mxs/mx28evk: add mmc device ARM: mxs/mx23evk: add mmc device ARM: mxs: dynamically allocate mmc device ARM: mx51_efika: update platform data for new mfd changes mx2/iomux: Set direction for CSPI2 pins ...
2011-03-29arm: Fold irq_set_chip/irq_set_handlerThomas Gleixner1-2/+2
Use irq_set_chip_and_handler() instead. Converted with coccinelle. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-03-29arm: Cleanup the irq namespaceThomas Gleixner1-3/+3
Convert to the new function names. Automated with coccinelle. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-03-29arm: Use generic show_interrupts()Thomas Gleixner1-50/+5
Use the generic version and just keep the arch specific output. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-03-29arm: Use irq flag setter functionThomas Gleixner1-9/+6
Use the proper accessor function instead of fiddling in the status bits directly. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: linux-arm-kernel@lists.infradead.org
2011-03-29arm: bios32: Remove non exisiting machine codeThomas Gleixner1-25/+0
The id removal left this machine check in which breaks the build on some platforms. Remove it. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-03-28ARM: 6826/1: Merge v6 and v7 DEBUG_LL DCC supportStephen Boyd1-18/+1
The inline assembly differences for v6 vs. v7 are purely optimizations. On a v7 processor, an mrc with the pc sets the condition codes to the 28-31 bits of the register being read. It just so happens that the TX/RX full bits the DCC support code is testing for are high enough in the register to be put into the condition codes. On a v6 processor, this "feature" isn't implemented and thus we have to do the usual read, mask, test operations to check for TX/RX full. Thus, we can drop the v7 implementation and just use the v6 implementation for both. Cc: Tony Lindgren <tony@atomide.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-03-28ARM: 6838/1: etm: fix section mismatch warningMing Lei1-2/+2
The patch fixes the warning below: WARNING: arch/arm/kernel/built-in.o(.data+0x27c): Section mismatch in reference from the variable etb_driver to the function .init.text:etb_probe() The variable etb_driver references the function __init etb_probe() If the reference is valid then annotate the variable with __init* or __refdata (see linux/init.h) or name the variable: *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console, WARNING: arch/arm/kernel/built-in.o(.data+0x2cc): Section mismatch in reference from the variable etm_driver to the function .init.text:etm_probe() The variable etm_driver references the function __init etm_probe() If the reference is valid then annotate the variable with __init* or __refdata (see linux/init.h) or name the variable: *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console, Signed-off-by: Ming Lei <tom.leiming@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-03-28ARM: 6837/1: remove unused pci_fixup_prpmc1100Colin Cross1-25/+0
The PrPMC1100 machine was removed in 2.6.11, but left a reference to machine_is_prpmc1100 in arch/arm/kernel/bios32.c. 6f82f4db80189281a8ac42f2e72396accb719b57 removed the machine type, which causes a build failure: CC arch/arm/kernel/bios32.o arch/arm/kernel/bios32.c: In function 'pci_fixup_prpmc1100': arch/arm/kernel/bios32.c:174: error: implicit declaration of function 'machine_is_prpmc1100' Remove the unused pci_fixup_prpcm1100. Signed-off-by: Colin Cross <ccross@android.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-03-28ARM: 6836/1: kprobes/fix emulation of LDR/STR instruction when Rn == PCViktor Rosendahl1-4/+6
The Rn value from the emulation is unconditionally written back; this is fine as long as Rn != PC because in that case, even if the instruction isn't a write back instruction, it will only result in the same value being written back. In case Rn == PC, then the emulated instruction doesn't have the actual PC value in Rn but an adjusted value; when this is written back, it will result in the PC being incorrectly updated. An altenative solution would be to check bits 24 and 22 to see whether the instruction actually is a write back instruction or not. I think it's enough to check whether Rn != PC, because: - it's looks cheaper than the alternative - to my understaning it's not permitted to update the PC with a write back instruction, so we don't lose any ability to emulate legal instructions. - in case of writing back for non write back instructions where Rn != PC, it doesn't matter because the values are the same. Regarding the second point above, it would possibly be prudent to add some checking to prep_emulate_ldr_str(), so that instructions with both write back and Rn == PC would be rejected. Signed-off-by: Viktor Rosendahl <viktor.rosendahl@nokia.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-03-26ARM: 6835/1: perf: ensure overflows aren't missed due to IRQ latencyWill Deacon4-12/+15
If a counter overflows during a perf stat profiling run it may overtake the last known value of the counter: 0 prev new 0xffffffff |----------|-------|----------------------| In this case, the number of events that have occurred is (0xffffffff - prev) + new. Unfortunately, the event update code will not realise an overflow has occurred and will instead report the event delta as (new - prev) which may be considerably smaller than the real count. This patch adds an extra argument to armpmu_event_update which indicates whether or not an overflow has occurred. If an overflow has occurred then we use the maximum period of the counter to calculate the elapsed events. Acked-by: Jamie Iles <jamie@jamieiles.com> Reported-by: Ashwin Chaugule <ashwinc@codeaurora.org> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-03-26ARM: 6834/1: perf: reset counters on all CPUs during initialisationWill Deacon2-6/+30
ARMv7 dictates that the interrupt-enable and count-enable registers for each PMU counter are UNKNOWN following core reset. This patch adds a new (optional) function pointer to struct arm_pmu for resetting the PMU state during init. The reset function is called on each CPU via an arch_initcall in the generic ARM perf_event code and allows the PMU backend to write sane values to any UNKNOWN registers. Acked-by: Jean Pihet <j-pihet@ti.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-03-26ARM: 6833/1: perf: add required isbs() to ARMv7 backendWill Deacon1-0/+2
The ARMv7 architecture does not guarantee that effects from co-processor writes are immediately visible to following instructions. This patch adds two isbs to the ARMv7 perf code: (1) Immediately after selecting an event register, so that the PMU state following this instruction is consistent with the new event. (2) Immediately before writing to the PMCR, so that any previous writes to the PMU have taken effect before (typically) enabling the counters. Acked-by: Jean Pihet <j-pihet@ti.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-03-26ARM: 6825/1: kernel/sleep.S: fix Thumb2 compilation issuesNicolas Pitre1-3/+11
Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org> Reviewed-by: Dave Martin <dave.martin@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-03-24Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds4-17/+17
* 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (35 commits) ARM: Update (and cut down) mach-types ARM: 6771/1: vexpress: add support for multiple core tiles ARM: 6797/1: hw_breakpoint: Fix newlines in WARNings ARM: 6751/1: vexpress: select applicable errata workarounds in Kconfig ARM: 6753/1: omap4: Enable ARM local timers with OMAP4430 es1.0 exception ARM: 6759/1: smp: Select local timers vs broadcast timer support runtime ARM: pgtable: add pud-level code ARM: 6673/1: LPAE: use phys_addr_t instead of unsigned long for start of membanks ARM: Use long long format when printing meminfo physical addresses ARM: integrator: add Integrator/CP sched_clock support ARM: realview/vexpress: consolidate SMP bringup code ARM: realview/vexpress: consolidate localtimer support ARM: integrator/versatile: consolidate FPGA IRQ handling code ARM: rationalize versatile family Kconfig/Makefile ARM: realview: remove old AMBA device DMA definitions ARM: versatile: remove old AMBA device DMA definitions ARM: vexpress: use new init_early for clock tree and sched_clock init ARM: realview: use new init_early for clock tree and sched_clock init ARM: versatile: use new init_early for clock tree and sched_clock init ARM: integrator: use new init_early for clock tree init ...
2011-03-24crash_dump: export is_kdump_kernel to modules, consolidate elfcorehdr_addr, ↵Olaf Hering2-27/+0
setup_elfcorehdr and saved_max_pfn The Xen PV drivers in a crashed HVM guest can not connect to the dom0 backend drivers because both frontend and backend drivers are still in connected state. To run the connection reset function only in case of a crashdump, the is_kdump_kernel() function needs to be available for the PV driver modules. Consolidate elfcorehdr_addr, setup_elfcorehdr and saved_max_pfn into kernel/crash_dump.c Also export elfcorehdr_addr to make is_kdump_kernel() usable for modules. Leave 'elfcorehdr' as early_param(). This changes powerpc from __setup() to early_param(). It adds an address range check from x86 also on ia64 and powerpc. [akpm@linux-foundation.org: additional #includes] [akpm@linux-foundation.org: remove elfcorehdr_addr export] [akpm@linux-foundation.org: fix for Tejun's mm/nobootmem.c changes] Signed-off-by: Olaf Hering <olaf@aepfle.de> Cc: Russell King <rmk@arm.linux.org.uk> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-03-20Merge branches 'fixes', 'pgt-next' and 'versatile' into develRussell King4-17/+17
2011-03-18Merge branch 'devel-stable' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds2-1/+23
* 'devel-stable' of master.kernel.org:/home/rmk/linux-2.6-arm: (289 commits) davinci: DM644x EVM: register MUSB device earlier davinci: add spi devices on tnetv107x evm davinci: add ssp config for tnetv107x evm board davinci: add tnetv107x ssp platform device spi: add ti-ssp spi master driver mfd: add driver for sequencer serial port ARM: EXYNOS4: Implement Clock gating for System MMU ARM: EXYNOS4: Enhancement of System MMU driver ARM: EXYNOS4: Add support for gpio interrupts ARM: S5P: Add function to register gpio interrupt bank data ARM: S5P: Cleanup S5P gpio interrupt code ARM: EXYNOS4: Add missing GPYx banks ARM: S3C64XX: Fix section mismatch from cpufreq init ARM: EXYNOS4: Add keypad device to the SMDKV310 ARM: EXYNOS4: Update clocks for keypad ARM: EXYNOS4: Update keypad base address ARM: EXYNOS4: Add keypad device helpers ARM: EXYNOS4: Add support for SATA on ARMLEX4210 plat-nomadik: make GPIO interrupts work with cpuidle ApSleep mach-u300: define a dummy filter function for coh901318 ... Fix up various conflicts in - arch/arm/mach-exynos4/cpufreq.c - arch/arm/mach-mxs/gpio.c - drivers/net/Kconfig - drivers/tty/serial/Kconfig - drivers/tty/serial/Makefile - drivers/usb/gadget/fsl_mxc_udc.c - drivers/video/Kconfig
2011-03-18Merge branches 'defcfg', 'drivers' and 'cyberpro-next' of ↵Linus Torvalds1-2/+2
master.kernel.org:/home/rmk/linux-2.6-arm * 'defcfg' of master.kernel.org:/home/rmk/linux-2.6-arm: ARM: 6647/1: add Versatile Express defconfig ARM: 6644/1: mach-ux500: update the U8500 defconfig * 'drivers' of master.kernel.org:/home/rmk/linux-2.6-arm: ARM: 6764/1: pl011: factor out FIFO to TTY code ARM: 6763/1: pl011: add optional RX DMA to PL011 v2 ARM: 6758/1: amba: support pm ops ARM: amba: make amba_driver id_table const ARM: amba: make internal ID table handling const ARM: amba: make probe() functions take const id tables ARM: 6662/1: amba: make amba_bustype non-static ARM: mmci: add dmaengine-based DMA support ARM: mmci: no need for separate host->data_xfered ARM: mmci: avoid unnecessary switch to data available PIO interrupts ARM: mmci: no need to call flush_dcache_page() with sg_miter API ARM: mmci: avoid reporting too many completed bytes on fifo overrun ALSA: AACI: make fifo variables more explanitory ALSA: AACI: no need to call snd_pcm_period_elapsed() for each period ALSA: AACI: use snd_pcm_lib_period_bytes() ALSA: AACI: clean up AACI announcement printk ALSA: AACI: fix channel mask selection ALSA: AACI: fix number of channels for record ALSA: AACI: fix multiple IRQ claiming * 'cyberpro-next' of master.kernel.org:/home/rmk/linux-2.6-arm: VIDEO: cyberpro: remove unused cyber2000fb_get_fb_var() VIDEO: cyberpro: remove useless function extreg pointers VIDEO: cyberpro: update handling of device structures VIDEO: cyberpro: add support for video capture I2C VIDEO: cyberpro: make 'reg_b0_lock' always present VIDEO: cyberpro: add I2C support VIDEO: cyberpro: select lowest multipler/divisor for PLL
2011-03-17Merge branches 'aaci', 'mmci-dma', 'pl' and 'pl011' into driversRussell King11-63/+142
2011-03-17Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds23-624/+472
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (91 commits) ARM: 6806/1: irq: introduce entry and exit functions for chained handlers ARM: 6781/1: Thumb-2: Work around buggy Thumb-2 short branch relocations in gas ARM: 6747/1: P2V: Thumb2 support ARM: 6798/1: aout-core: zero thread debug registers in a.out core dump ARM: 6796/1: Footbridge: Fix I/O mappings for NOMMU mode ARM: 6784/1: errata: no automatic Store Buffer drain on Cortex-A9 ARM: 6772/1: errata: possible fault MMU translations following an ASID switch ARM: 6776/1: mach-ux500: activate fix for errata 753970 ARM: 6794/1: SPEAr: Append UL to device address macros. ARM: 6793/1: SPEAr: Remove unused *_SIZE macros from spear*.h files ARM: 6792/1: SPEAr: Replace SIZE macro's with SZ_4K macros ARM: 6791/1: SPEAr3xx: Declare device structures after shirq code ARM: 6790/1: SPEAr: Clock Framework: Rename usbd clock and align apb_clk entry ARM: 6789/1: SPEAr3xx: Rename sdio to sdhci ARM: 6788/1: SPEAr: Include mach/hardware.h instead of mach/spear.h ARM: 6787/1: SPEAr: Reorder #includes in .h & .c files. ARM: 6681/1: SPEAr: add debugfs support to clk API ARM: 6703/1: SPEAr: update clk API support ARM: 6679/1: SPEAr: make clk API functions more generic ARM: 6737/1: SPEAr: formalized timer support ...
2011-03-17Merge branch 'p2v' into develRussell King6-61/+214
Conflicts: arch/arm/kernel/module.c arch/arm/mach-s5pv210/sleep.S
2011-03-17Merge branch 'v6v7' into develRussell King4-22/+16
Conflicts: arch/arm/include/asm/cacheflush.h arch/arm/include/asm/proc-fns.h arch/arm/mm/Kconfig
2011-03-17Merge branch 'misc' into develRussell King12-563/+94
Conflicts: arch/arm/Kconfig
2011-03-17Merge branches 'at91', 'ep93xx', 'errata', 'footbridge', 'fncpy', 'gemini', ↵Russell King12-19/+228
'irqdata', 'pm', 'sh', 'smp', 'spear', 'ux500' and 'via' into devel
2011-03-16Merge branch 'for-2.6.39' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu * 'for-2.6.39' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: percpu, x86: Add arch-specific this_cpu_cmpxchg_double() support percpu: Generic support for this_cpu_cmpxchg_double() alpha: use L1_CACHE_BYTES for cacheline size in the linker script percpu: align percpu readmostly subsection to cacheline Fix up trivial conflict in arch/x86/kernel/vmlinux.lds.S due to the percpu alignment having changed ("x86: Reduce back the alignment of the per-CPU data section")
2011-03-16Merge branch 'timers-core-for-linus' of ↵Linus Torvalds1-3/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (62 commits) posix-clocks: Check write permissions in posix syscalls hrtimer: Remove empty hrtimer_init_hres_timer() hrtimer: Update hrtimer->state documentation hrtimer: Update base[CLOCK_BOOTTIME].offset correctly timers: Export CLOCK_BOOTTIME via the posix timers interface timers: Add CLOCK_BOOTTIME hrtimer base time: Extend get_xtime_and_monotonic_offset() to also return sleep time: Introduce get_monotonic_boottime and ktime_get_boottime hrtimers: extend hrtimer base code to handle more then 2 clockids ntp: Remove redundant and incorrect parameter check mn10300: Switch do_timer() to xtimer_update() posix clocks: Introduce dynamic clocks posix-timers: Cleanup namespace posix-timers: Add support for fd based clocks x86: Add clock_adjtime for x86 posix-timers: Introduce a syscall for clock tuning. time: Splitout compat timex accessors ntp: Add ADJ_SETOFFSET mode bit time: Introduce timekeeping_inject_offset posix-timer: Update comment ... Fix up new system-call-related conflicts in arch/x86/ia32/ia32entry.S arch/x86/include/asm/unistd_32.h arch/x86/include/asm/unistd_64.h arch/x86/kernel/syscall_table_32.S (name_to_handle_at()/open_by_handle_at() vs clock_adjtime()), and some due to movement of get_jiffies_64() in: kernel/time.c
2011-03-12Merge branch 'master' of ↵Russell King2-6/+26
git://git.kernel.org/pub/scm/linux/kernel/git/tglx/linux-2.6-tcc into devel-stable
2011-03-10ARM: 6747/1: P2V: Thumb2 supportNicolas Pitre1-1/+48
Adding Thumb2 support to the runtime patching of the virt_to_phys and phys_to_virt opcodes. Tested both the 8-bit and the 16-bit fixups, using different placements in memory to exercize all code paths. Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org> Reviewed-by: Dave Martin <dave.martin@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-03-10ARM: 6797/1: hw_breakpoint: Fix newlines in WARNingsStephen Boyd1-7/+7
These warnings are missing newlines and spaces causing confusing looking output when they trigger. Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-03-06Merge git://git.kernel.org/pub/scm/linux/kernel/git/nico/orion into devel-stableRussell King6-12/+38
2011-03-04[ARM] add machine-specific hook to machine_kexecEric Cooper1-0/+7
Provide the option to call a machine-specific function before kexec'ing a new kernel. Signed-off-by: Eric Cooper <ecc@cmu.edu> Signed-off-by: Nicolas Pitre <nico@fluxnic.net>
2011-02-26ARM: 6768/1: hw_breakpoint: ensure debug logic is powered up on v7 coresWill Deacon1-3/+23
ARMv7 allows the debug core logic to be powered down and provides the DBGPRSR register so that software can power-up and check the status of the logic. This patch ensures that the debug logic is powered up on ARMv7 cores before we attempt to access the extended debug registers. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-02-26ARM: 6767/1: ptrace: fix register indexing in GETHBPREGS requestWill Deacon1-3/+3
The GETHBPREGS ptrace request incorrectly maps its index argument onto the thread's saved debug state when the index != 0. This has not yet been seen from userspace because GDB (the only user of this request) only reads from register 0. This patch fixes the indexing. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-02-23ARM: 6759/1: smp: Select local timers vs broadcast timer support runtimeSantosh Shilimkar1-4/+3
The current code support of dummy timers in absence of local timer is compile time. This is an attempt to convert it to runtime so that on few SOC version if the local timers aren't supported kernel can switch to dummy timers. OMAP4430 ES1.0 does suffer from this limitation. This patch should not have any functional impact on affected files. Cc: Daniel Walker <dwalker@codeaurora.org> Cc: Bryan Huntsman <bryanh@codeaurora.org> Cc: Tony Lindgren <tony@atomide.com> Cc: Kukjin Kim <kgene.kim@samsung.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Magnus Damm <magnus.damm@gmail.com> Cc: Colin Cross <ccross@android.com> Cc: Erik Gilling <konkers@android.com> Cc: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com> Cc: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: David Brown <davidb@codeaurora.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-02-23ARM: 6668/1: ptrace: remove single-step emulation codeWill Deacon4-429/+2
PTRACE_SINGLESTEP is a ptrace request designed to offer single-stepping support to userspace when the underlying architecture has hardware support for this operation. On ARM, we set arch_has_single_step() to 1 and attempt to emulate hardware single-stepping by disassembling the current instruction to determine the next pc and placing a software breakpoint on that location. Unfortunately this has the following problems: 1.) Only a subset of ARMv7 instructions are supported 2.) Thumb-2 is unsupported 3.) The code is not SMP safe We could try to fix this code, but it turns out that because of the above issues it is rarely used in practice. GDB, for example, uses PTRACE_POKETEXT and PTRACE_PEEKTEXT to manage breakpoints itself and does not require any kernel assistance. This patch removes the single-step emulation code from ptrace meaning that the PTRACE_SINGLESTEP request will return -EIO on ARM. Portable code must check the return value from a ptrace call and handle the failure gracefully. Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-02-23ARM: irq migration: ensure migration is handled safelyRussell King1-19/+31
Ensure appropriate locks are taken to ensure that IRQ migration off the current CPU is race-free. We may have a concurrent set_affinity via procfs running on another CPU in parallel with the IRQ migration, resulting in unpredictable results. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-02-23ARM: irq migration: force migration off CPU going downRussell King1-1/+1
The force argument to irq_set_affinity really should be 'true' as moving IRQs off a CPU which is going down isn't optional. Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-02-23ARM: 6608/1: enable bridges in pci_common_init.Colin Tuckley1-0/+5
Add a missing call to pci_enable_bridges() so that devices behind bridges get found by the pci bus scan. Signed-off-by: Chris Partington <chris.partington@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-02-23ARM: improve module relocation fixup diagnosticsRussell King1-13/+14
Current diagnostics are rather poor when things go wrong: ipv6: relocation out of range, section 2 reloc 0 sym 'snmp_mib_free' Let's include a little more information about the problem: ipv6: section 2 reloc 0 sym 'snmp_mib_free': relocation 28 out of range (0xbf0000a4 -> 0xc11b4858) so that we show exactly what the problem is - not only what type of relocation but also the offending address range too. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-02-23ARM: fix some sparse errors in generic ARM codeRussell King2-1/+2
arch/arm/kernel/return_address.c:37:6: warning: symbol 'return_address' was not declared. Should it be static? arch/arm/kernel/setup.c:76:14: warning: symbol 'processor_id' was not declared. Should it be static? arch/arm/kernel/traps.c:259:1: warning: symbol 'die_lock' was not declared. Should it be static? arch/arm/vfp/vfpmodule.c:156:6: warning: symbol 'vfp_raise_sigfpe' was not declared. Should it be static? Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-02-23ARM: amba: make probe() functions take const id tablesRussell King1-2/+2
Make Primecell driver probe functions take a const pointer to their ID tables. Drivers should never modify their ID tables in their probe handler. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-02-23ARM: 6748/1: ignore mdesc->boot_params if out of rangeNicolas Pitre1-2/+19
The initial MMU table created in head.S contains a 1 MB mapping at the start of memory to let the early kernel boot code access the boot params specified by mdesc->boot_params. When using CONFIG_ARM_PATCH_PHYS_VIRT it is possible for the kernel to have a different idea of where the start of memory is at run time, making the compile-time determined mdesc->boot_params pointing to a memory area which is not mapped. Any access to the boot params in that case will fault and silently hang the kernel at that point. It is therefore a better idea to simply ignore mdesc->boot_params in that case and give the kernel a chance to print some diagnostic on the console later. If the bootloader provides a valid pointer in r2 to the kernel then this is used instead of mdesc->boot_params, and an explicit mapping is already created in the initial MMU table for it. It is therefore a good idea to use that facility when using a relocated kernel. Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-02-23ARM: 6749/1: fold lookup_machine_type() into setup_machine()Nicolas Pitre1-31/+17
Since commit 6fc31d54 there is no callers for lookup_machine_type() other than setup_machine(). And if the former fails it won't return, therefore the error path in the later is dead code. Let's clean things up by merging them together. Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-02-22ARM: pm: allow generic sleep code to be used with SMP CPU idleRussell King1-1/+26
Allow the generic sleep code to be used with SMP CPU idle by storing N CPU stack pointers rather than just one. Tested on Assabet and Tegra 2. Tested-by: Colin Cross <ccross@android.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-02-22ARM: pm: add generic CPU suspend/resume supportRussell King3-0/+119
This adds core support for saving and restoring CPU coprocessor registers for suspend/resume support. This contains support for suspend with ARM920, ARM926, SA11x0, PXA25x, PXA27x, PXA3xx, V6 and V7 CPUs. Tested on Assabet and Tegra 2. Tested-by: Colin Cross <ccross@android.com> Tested-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-02-21ARM: 6745/1: kprobes insn decoding fixNicolas Pitre1-1/+1
Marcin Slusarz says: > In arch/arm/kernel/kprobes-decode.c there's a function > arm_kprobe_decode_insn which does: > > } else if ((insn & 0x0e000000) == 0x0c400000) { > ... > > This is always false, so code below is dead. > I found this bug by coccinelle (http://coccinelle.lip6.fr/). Reported-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-02-21ARM: Keep exit text/data around for SMP_ON_UPRussell King1-0/+9
When SMP_ON_UP is used and the spinlocks are inlined, we end up with inline spinlocks in the exit code, with references from the SMP alternatives section to the exit sections. This causes link time errors. Avoid this by placing the exit sections in the init-discarded region. Cc: <stable@kernel.org> Tested-by: Dave Martin <dave.martin@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-02-21ARM: Ensure predictable endian state on signal handler entryRussell King1-1/+3
Ensure a predictable endian state when entering signal handlers. This avoids programs which use SETEND to momentarily switch their endian state from having their signal handlers entered with an unpredictable endian state. Cc: <stable@kernel.org> Acked-by: Dave Martin <dave.martin@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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