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2009-01-27USB: musb_hdrc: another davinci buildfix (otg related)David Brownell
The DaVinci code had an implementation of the OTG transceiver glue too; make it use the new-standard one. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Felipe Balbi <felipe.balbi@nokia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-01-26Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds
* master.kernel.org:/home/rmk/linux-2.6-arm: (22 commits) [ARM] fix section-based ioremap [NET] am79c961a: fix spin_lock usage [ARM] omap: usb: thou shalt not provide empty release functions [ARM] omap: watchdog: allow OMAP watchdog driver on OMAP34xx platforms [ARM] 5369/1: omap mmc: Add new omap hsmmc controller for 2430 and 34xx, v3 [ARM] clkdev: fix clock matching [ARM] 5370/1: at91: fix rm9200 watchdog [ARM] 5368/1: arch/arm/mach-davinci/usb.c buildfix [ARM] 5365/1: s3cmci: Use new include path of dma.h [ARM] fix StrongARM-11x0 page copy implementation [ARM] omap: ensure OMAP drivers pass a struct device to clk_get() ARM: OMAP: Fix compile for h3 MMC ARM: OMAP: Remove unused platform devices, v3 ARM: OMAP: Fix ASoC by enabling writes to XCCR and RCCR McBSP registers, v3 ARM: OMAP: Fix OSK ASoC by registering I2C board info for tlvaic23 ARM: OMAP: remove duplicated #include's ARM: OMAP: Fix DMA CCR programming for request line > 63, v3 ARM: OMAP: Fix gpio.c compile on 15xx with CONFIG_DEBUGFS ARM: OMAP: Fix compile for beagle ARM: OMAP: Fix gpio by switching to generic gpio calls, v2 ...
2009-01-26Merge branch 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6Linus Torvalds
* 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6: i2c: Warn on deprecated binding model use eeprom: More consistent symbol names eeprom: Move 93cx6 eeprom driver to /drivers/misc/eeprom spi: Move at25 (for SPI eeproms) to /drivers/misc/eeprom i2c: Move old eeprom driver to /drivers/misc/eeprom i2c: Move at24 to drivers/misc/eeprom i2c: Quilt tree has moved i2c: Delete many unused adapter IDs i2c: Delete 10 unused driver IDs
2009-01-26Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fixesLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fixes: kbuild: fix kbuild.txt typos kbuild: print usage with no arguments in scripts/config Revert "kbuild: strip generated symbols from *.ko"
2009-01-26Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: sparc64: Fix DAX handling via userspace access from kernel. sparc64: Annotate sparc64 specific syscalls with SYSCALL_DEFINEx() [CVE-2009-0029] sparc: Enable syscall wrappers for 64-bit sparc64: Initialize FHC/CLOCK LED platform_device 'id' field correctly. sparc64: fix modpost failure sparc64: fix readout of cpu/fpu type
2009-01-26eeprom: More consistent symbol namesJean Delvare
Now that all EEPROM drivers live in the same place, let's harmonize their symbol names. Also fix eeprom's dependencies, it definitely needs sysfs, and is no longer experimental after many years in the kernel tree. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Wolfram Sang <w.sang@pengutronix.de> Cc: David Brownell <dbrownell@users.sourceforge.net>
2009-01-26m68k{nommu}: fixups after the header moveHarvey Harrison
swab.h seems to have been missed during the header merge. Add conditionals similar to byteorder.h and remove the now unnecessary byteorder_no/mm.h Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-26Merge branch 'for-next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu: m68k,m68knommu: merge header files Resolve trivial conflict in arch/m68knommu/include/asm/Kbuild
2009-01-26Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6Linus Torvalds
* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: [S390] Add missing compat system call wrappers. [S390] etr/stp: fix possible deadlock [S390] cputime: fix lowcore initialization on cpu hotplug [S390] fix compat sigaltstack syscall table entry [S390] personality: fix personality loss on execve
2009-01-26Merge branch 'fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx: i.MX31: framebuffer driver i.MX31: Image Processing Unit DMA and IRQ drivers dmaengine: add async_tx_clear_ack() macro dmaengine: dma_issue_pending_all == nop when CONFIG_DMA_ENGINE=n dmaengine: kill some dubious WARN_ONCEs fsldma: print correct IRQ on mpc83xx fsldma: check for NO_IRQ in fsl_dma_chan_remove() dmatest: Use custom map/unmap for destination buffer fsldma: use a valid 'device' for dma_pool_create dmaengine: fix dependency chaining
2009-01-26Merge branch 'sh/for-2.6.29' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6 * 'sh/for-2.6.29' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (22 commits) dma-coherent: Restore dma_alloc_from_coherent() large alloc fall back policy. dma-coherent: per-device coherent area is in pages, not bytes. sh: fix unaligned and nonexistent address handling nommu: Stub in vm_map_ram()/vm_unmap_ram()/vm_unmap_aliases(). sh: fix sh-sci / early printk build on sh7723 sh: export the sh7343 JPU to user space sh: update defconfigs. serial: sh-sci: Fix up SH7720/SH7721 SCI build. sh: Kill off obsolete busses from arch/sh/Kconfig. sh: sh7785lcr/highlander/hp6xx need linux/irq.h. sh: Migo-R MMC support using spi_gpio and mmc_spi. sh: ap325rxa MMC support using spi_gpio and mmc_spi sh: mach-x3proto: needs linux/irq.h. sh: Drop the BKL from sys_execve() on SH-5. sh: convert rsk7203 to use smsc911x. sh: convert magicpanelr2 platform to use smsc911x. sh: convert ap325rxa platform to use smsc911x. sh: mach-migor: Add tw9910 support. sh: mach-migor: Delete soc_camera_platform setup. sh: mach-migor: Add ov772x support. ...
2009-01-26Merge branch 'core-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: debugobjects: add and use INIT_WORK_ON_STACK rcu: remove duplicate CONFIG_RCU_CPU_STALL_DETECTOR relay: fix lock imbalance in relay_late_setup_files oprofile: fix uninitialized use of struct op_entry rcu: move Kconfig menu softlock: fix false panic which can occur if softlockup_thresh is reduced rcu: add __cpuinit to rcu_init_percpu_data()
2009-01-26Merge branch 'timers-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: hrtimers: fix inconsistent lock state on resume in hres_timers_resume time-sched.c: tick_nohz_update_jiffies should be static locking, hpet: annotate false positive warning kernel/fork.c: unused variable 'ret' itimers: remove the per-cpu-ish-ness
2009-01-26Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (29 commits) xen: unitialised return value in xenbus_write_transaction x86: fix section mismatch warning x86: unmask CPUID levels on Intel CPUs, fix x86: work around PAGE_KERNEL_WC not getting WC in iomap_atomic_prot_pfn. x86: use standard PIT frequency xen: handle highmem pages correctly when shrinking a domain x86, mm: fix pte_free() xen: actually release memory when shrinking domain x86: unmask CPUID levels on Intel CPUs x86: add MSR_IA32_MISC_ENABLE bits to <asm/msr-index.h> x86: fix PTE corruption issue while mapping RAM using /dev/mem x86: mtrr fix debug boot parameter x86: fix page attribute corruption with cpa() Revert "x86: signal: change type of paramter for sys_rt_sigreturn()" x86: use early clobbers in usercopy*.c x86: remove kernel_physical_mapping_init() from init section fix: crash: IP: __bitmap_intersects+0x48/0x73 cpufreq: use work_on_cpu in acpi-cpufreq.c for drv_read and drv_write work_on_cpu: Use our own workqueue. work_on_cpu: don't try to get_online_cpus() in work_on_cpu. ...
2009-01-26x86: fix section mismatch warningRakib Mullick
Here function vmi_activate calls a init function activate_vmi , which causes the following section mismatch warnings: LD arch/x86/kernel/built-in.o WARNING: arch/x86/kernel/built-in.o(.text+0x13ba9): Section mismatch in reference from the function vmi_activate() to the function .init.text:vmi_time_init() The function vmi_activate() references the function __init vmi_time_init(). This is often because vmi_activate lacks a __init annotation or the annotation of vmi_time_init is wrong. WARNING: arch/x86/kernel/built-in.o(.text+0x13bd1): Section mismatch in reference from the function vmi_activate() to the function .devinit.text:vmi_time_bsp_init() The function vmi_activate() references the function __devinit vmi_time_bsp_init(). This is often because vmi_activate lacks a __devinit annotation or the annotation of vmi_time_bsp_init is wrong. WARNING: arch/x86/kernel/built-in.o(.text+0x13bdb): Section mismatch in reference from the function vmi_activate() to the function .devinit.text:vmi_time_ap_init() The function vmi_activate() references the function __devinit vmi_time_ap_init(). This is often because vmi_activate lacks a __devinit annotation or the annotation of vmi_time_ap_init is wrong. Fix it by marking vmi_activate() as __init too. Signed-off-by: Rakib Mullick <rakib.mullick@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-26x86: unmask CPUID levels on Intel CPUs, fixIngo Molnar
Impact: fix boot hang on pre-model-15 Intel CPUs rdmsrl_safe() does not work in very early bootup code yet, because we dont have the pagefault handler installed yet so exception section does not get parsed. rdmsr_safe() will just crash and hang the bootup. So limit the MSR_IA32_MISC_ENABLE MSR read to those CPU types that support it. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-26x86: work around PAGE_KERNEL_WC not getting WC in iomap_atomic_prot_pfn.Eric Anholt
In the absence of PAT, PAGE_KERNEL_WC ends up mapping to a memory type that gets UC behavior even in the presence of a WC MTRR covering the area in question. By swapping to PAGE_KERNEL_UC_MINUS, we can get the actual behavior the caller wanted (WC if you can manage it, UC otherwise). This recovers the 40% performance improvement of using WC in the DRM to upload vertex data. Signed-off-by: Eric Anholt <eric@anholt.net> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-01-25[ARM] fix section-based ioremapRussell King
Tomi Valkeinen reports: Running with latest linux-omap kernel on OMAP3 SDP board, I have problem with iounmap(). It looks like iounmap() does not properly free large areas. Below is a test which fails for me in 6-7 loops. for (i = 0; i < 200; ++i) { vaddr = ioremap(paddr, size); if (!vaddr) { printk("couldn't ioremap\n"); break; } iounmap(vaddr); } The changes to vmalloc.c weren't reflected in the ARM ioremap implementation. Turns out the fix is rather simple. Tested-by: Tomi Valkeinen <tomi.valkeinen@nokia.com> Tested-by: Matt Gerassimoff <mgeras@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-01-25x86: use standard PIT frequencyIngo Molnar
the RDC and ELAN platforms use slighly different PIT clocks, resulting in a timex.h hack that changes PIT_TICK_RATE during build time. But if a tester enables any of these platform support .config options, the PIT will be miscalibrated on standard PC platforms. So use one frequency - in a subsequent patch we'll add a quirk to allow x86 platforms to define different PIT frequencies. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-24[ARM] omap: usb: thou shalt not provide empty release functionsRussell King
... for devices. Doing so is a bug, plain and simple, and drives GregKH round the bend. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-01-24[ARM] clkdev: fix clock matchingRussell King
The old matching algorithm was too fuzzy, causing false positives. For example, when asked for device D connection C1 and we only find device D connection C2, we return that as a valid match despite the connection names being different. Change the algorithm such that: An entry with a NULL ID is assumed to be a wildcard. If an entry has a device ID, it must match If an entry has a connection ID, it must match However, we maintain the order of precidence while still only doing a single pass over all entries: dev+con > dev only > con only. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-01-24[ARM] 5368/1: arch/arm/mach-davinci/usb.c buildfixDavid Brownell
From: David Brownell <dbrownell@users.sourceforge.net> Subject: ARM/mach-davinci/usb.c buildfix CC arch/arm/mach-davinci/usb.o arch/arm/mach-davinci/usb.c:60: error: 'IRQ_USBINT' undeclared here (not in a function) make[1]: *** [arch/arm/mach-davinci/usb.o] Error 1 Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-01-24[ARM] fix StrongARM-11x0 page copy implementationRussell King
Which had the 'from' and 'to' pages reversed. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-01-23x86, mm: fix pte_free()Peter Zijlstra
On -rt we were seeing spurious bad page states like: Bad page state in process 'firefox' page:c1bc2380 flags:0x40000000 mapping:c1bc2390 mapcount:0 count:0 Trying to fix it up, but a reboot is needed Backtrace: Pid: 503, comm: firefox Not tainted 2.6.26.8-rt13 #3 [<c043d0f3>] ? printk+0x14/0x19 [<c0272d4e>] bad_page+0x4e/0x79 [<c0273831>] free_hot_cold_page+0x5b/0x1d3 [<c02739f6>] free_hot_page+0xf/0x11 [<c0273a18>] __free_pages+0x20/0x2b [<c027d170>] __pte_alloc+0x87/0x91 [<c027d25e>] handle_mm_fault+0xe4/0x733 [<c043f680>] ? rt_mutex_down_read_trylock+0x57/0x63 [<c043f680>] ? rt_mutex_down_read_trylock+0x57/0x63 [<c0218875>] do_page_fault+0x36f/0x88a This is the case where a concurrent fault already installed the PTE and we get to free the newly allocated one. This is due to pgtable_page_ctor() doing the spin_lock_init(&page->ptl) which is overlaid with the {private, mapping} struct. union { struct { unsigned long private; struct address_space *mapping; }; spinlock_t ptl; struct kmem_cache *slab; struct page *first_page; }; Normally the spinlock is small enough to not stomp on page->mapping, but PREEMPT_RT=y has huge 'spin'locks. But lockdep kernels should also be able to trigger this splat, as the lock tracking code grows the spinlock to cover page->mapping. The obvious fix is calling pgtable_page_dtor() like the regular pte free path __pte_free_tlb() does. It seems all architectures except x86 and nm10300 already do this, and nm10300 doesn't seem to use pgtable_page_ctor(), which suggests it doesn't do SMP or simply doesnt do MMU at all or something. Signed-off-by: Peter Zijlstra <a.p.zijlsta@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: <stable@kernel.org>
2009-01-23[S390] Add missing compat system call wrappers.Michael Holzheu
Add wrapper functions for the following compat system calls: * readahead * sendfile64 * tkill * tgkill * keyctl This ensures that the high order bits of the parameter registers are correctly sign extended. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2009-01-23[S390] etr/stp: fix possible deadlockHeiko Carstens
Precreate stop_machine threads in case the machine supports ETR/STP. Otherwise we might deadlock if a time sync operation gets scheduled and the creation of stop_machine threads would cause disk I/O. This is just the minimal fix. The real fix would be to only precreate stop_machine threads if ETR/STP is actually used. But that would be a rather large and complicated patch. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2009-01-23[S390] cputime: fix lowcore initialization on cpu hotplugHeiko Carstens
On (initial) cpu hotplug the lowcore values for user_timer and system_timer don't get initialized like they would get on each process schedule. On initial start of secondary cpus this leads to the situation where per thread user/system_timer values are larger than the corresponding contents of the lowcore. When later calculating time spent in user/system context the result can be negative. So for cpu hotplug we should manually initialize lowcore values. Fixes this bug: Kernel BUG at 000ec080 [verbose debug info unavailable] fixpoint divide exception: 0009 [#1] PREEMPT SMP Modules linked in: CPU: 10 Not tainted 2.6.28 #4 Process sysctl (pid: 975, task: 3fa752e0, ksp: 3fbebca0) Krnl PSW : 070c1000 800ec080 (show_stat+0x390/0x5fc) R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:0 CC:1 PM:0 Krnl GPRS: 7fffffff fefc7ce5 3faec080 003879ae 00000001 01388000 7fffffff 01388000 00000000 00000000 0049ad50 3fbebcf8 01388000 002f51a8 800ec1fe 3fbebcf8 Krnl Code: 800ec076: 9001b188 stm %r0,%r1,392(%r11) 800ec07a: 9801b0c0 lm %r0,%r1,192(%r11) 800ec07e: 1d05 dr %r0,%r5 >800ec080: 9001b0c0 stm %r0,%r1,192(%r11) 800ec084: 5860b0c4 l %r6,196(%r11) 800ec088: 1806 lr %r0,%r6 800ec08a: 8c800001 srdl %r8,1 800ec08e: 1d87 dr %r8,%r7 Call Trace: ([<00000000000ec1ee>] show_stat+0x4fe/0x5fc) [<00000000000c13e8>] seq_read+0xc4/0x3ac [<00000000000e4796>] proc_reg_read+0x6e/0x9c [<00000000000a6a44>] vfs_read+0x78/0x100 [<00000000000a6ba8>] sys_read+0x40/0x80 [<00000000000234a8>] sysc_do_restart+0x1a/0x1e Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2009-01-23[S390] fix compat sigaltstack syscall table entryMichael Holzheu
When 31 bit user space programs call sigaltstack on a 64 bit Linux OS, the system call returns -1 with errno=EFAULT. The 31 bit pointer passed to the system call is extended to 64 bit, but the high order bits are not set to zero. The kernel detects the invalid user space pointer and returns -EFAULT. To solve the problem, sys32_sigaltstack_wrapper() instead of sys32_sigaltstack() has to be called. The wrapper function sets the high order bits to zero. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2009-01-23[S390] personality: fix personality loss on execveHeiko Carstens
Use the personality() macro to mask out all bits that are not relevant for the personality type. The personality field contains bits for other things as well, so without masking out the not relevalent bits the comparison won't do what is expected. Reported-by: Andreas Krebbel <krebbel@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2009-01-22debugobjects: add and use INIT_WORK_ON_STACKThomas Gleixner
Impact: Fix debugobjects warning debugobject enabled kernels spit out a warning in hpet code due to a workqueue which is initialized on stack. Add INIT_WORK_ON_STACK() which calls init_timer_on_stack() and use it in hpet. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2009-01-22x86: unmask CPUID levels on Intel CPUsH. Peter Anvin
Impact: Fixes crashes with misconfigured BIOSes on XSAVE hardware Avuton Olrich reported early boot crashes with v2.6.28 and bisected it down to dc1e35c6e95e8923cf1d3510438b63c600fee1e2 ("x86, xsave: enable xsave/xrstor on cpus with xsave support"). If the CPUID limit bit in MSR_IA32_MISC_ENABLE is set, clear it to make all CPUID information available. This is required for some features to work, in particular XSAVE. Reported-and-bisected-by: Avuton Olrich <avuton@gmail.com> Tested-by: Avuton Olrich <avuton@gmail.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2009-01-21x86: add MSR_IA32_MISC_ENABLE bits to <asm/msr-index.h>H. Peter Anvin
Impact: None (new bit definitions currently unused) Add bit definitions for the MSR_IA32_MISC_ENABLE MSRs to <asm/msr-index.h>. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2009-01-21x86: fix PTE corruption issue while mapping RAM using /dev/memSuresh Siddha
Beschorner Daniel reported: > hwinfo problem since 2.6.28, showing this in the oops: > Corrupted page table at address 7fd04de3ec00 Also, PaX Team reported a regression with this commit: > commit 9542ada803198e6eba29d3289abb39ea82047b92 > Author: Suresh Siddha <suresh.b.siddha@intel.com> > Date: Wed Sep 24 08:53:33 2008 -0700 > > x86: track memtype for RAM in page struct This commit breaks mapping any RAM page through /dev/mem, as the reserve_memtype() was not initializing the return attribute type and as such corrupting the PTE entry that was setup with the return attribute type. Because of this bug, application mapping this RAM page through /dev/mem will die with "Corrupted page table at address xxxx" message in the kernel log and also the kernel identity mapping which maps the underlying RAM page gets converted to UC. Fix this by initializing the return attribute type before calling reserve_ram_pages_type() Reported-by: PaX Team <pageexec@freemail.hu> Reported-and-tested-by: Beschorner Daniel <Daniel.Beschorner@facton.com> Tested-and-Acked-by: PaX Team <pageexec@freemail.hu> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-21i.MX31: framebuffer driverGuennadi Liakhovetski
This is a framebuffer driver for i.MX31 SoCs. It only supports synchronous displays, vertical panning supported, no overlay support. Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Guennadi Liakhovetski <lg@denx.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2009-01-21x86: mtrr fix debug boot parameterThomas Renninger
while looking at: http://bugzilla.kernel.org/show_bug.cgi?id=11541 I realized that the mtrr.show param cannot work, because the code is processed much too early. This patch: - Declares mtrr.show as early_param - Stays consistent with the previous param (which I doubt that it ever worked), so mtrr.show=1 would still work - Declares mtrr_show as initdata Signed-off-by: Thomas Renninger <trenn@suse.de> Acked-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-21x86: fix page attribute corruption with cpa()Suresh Siddha
Impact: fix sporadic slowdowns and warning messages This patch fixes a performance issue reported by Linus on his Nehalem system. While Linus reverted the PAT patch (commit 58dab916dfb57328d50deb0aa9b3fc92efa248ff) which exposed the issue, existing cpa() code can potentially still cause wrong(page attribute corruption) behavior. This patch also fixes the "WARNING: at arch/x86/mm/pageattr.c:560" that various people reported. In 64bit kernel, kernel identity mapping might have holes depending on the available memory and how e820 reports the address range covering the RAM, ACPI, PCI reserved regions. If there is a 2MB/1GB hole in the address range that is not listed by e820 entries, kernel identity mapping will have a corresponding hole in its 1-1 identity mapping. If cpa() happens on the kernel identity mapping which falls into these holes, existing code fails like this: __change_page_attr_set_clr() __change_page_attr() returns 0 because of if (!kpte). But doesn't set cpa->numpages and cpa->pfn. cpa_process_alias() uses uninitialized cpa->pfn (random value) which can potentially lead to changing the page attribute of kernel text/data, kernel identity mapping of RAM pages etc. oops! This bug was easily exposed by another PAT patch which was doing cpa() more often on kernel identity mapping holes (physical range between max_low_pfn_mapped and 4GB), where in here it was setting the cache disable attribute(PCD) for kernel identity mappings aswell. Fix cpa() to handle the kernel identity mapping holes. Retain the WARN() for cpa() calls to other not present address ranges (kernel-text/data, ioremap() addresses) Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Cc: <stable@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-21sh: fix unaligned and nonexistent address handlingSUGIOKA Toshinobu
unaligned and nonexistent address causes wrong exception handling in traps_32.c(handle_unaligned_access). 'handle_unalinged_ins' should return -EFAULT if address error is fixed up with kernel exception table, otherwise 'handle_unaligned_access' increases already fixed program counter and then crash. for example ioctl(fd, TCGETA, (struct termio *)-1) never return and stay in TASK_UNINTERRUPTIBLE state forever in my kernel. Signed-off-by: SUGIOKA Toshinobu <sugioka@itonet.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-01-21sh: export the sh7343 JPU to user spaceMagnus Damm
This patch exports the sh7343 JPU to user space using uio_pdrv_genirq, very similar to the sh7722 JPU patch by Hayama-san. While at it fix up the end of the sh7722 JPU iomem resource. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-01-21sh: update defconfigs.Paul Mundt
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-01-21sh: Kill off obsolete busses from arch/sh/Kconfig.Paul Mundt
ISA can go away now that the hd6446x PCMCIA drivers no longer exist in-tree. The rationale for enabling CONFIG_ISA in the first place is likewise no longer valid given that the subsystem has changed since the time that assertion was valid. While we are at it, kill off SBUS, MCA, EISA, and so on. These are not supported and never will be. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-01-21sh: sh7785lcr/highlander/hp6xx need linux/irq.h.Paul Mundt
More build fixes.. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-01-21sh: Migo-R MMC support using spi_gpio and mmc_spi.Magnus Damm
This patch adds CN9 MMC support for MigoR using the mmc_spi driver on top of the bitbanging spi_gpio driver. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-01-21Revert "x86: signal: change type of paramter for sys_rt_sigreturn()"Ingo Molnar
This reverts commit 4217458dafaa57d8e26a46f5d05ab8c53cf64191. Justin Madru bisected this commit, it was causing weird Firefox crashes. The reason is that GCC mis-optimizes (re-uses) the on-stack parameters of the calling frame, which corrupts the syscall return pt_regs state and thus corrupts user-space register state. So we go back to the slightly less clean but more optimization-safe method of getting to pt_regs. Also add a comment to explain this. Resolves: http://bugzilla.kernel.org/show_bug.cgi?id=12505 Reported-and-bisected-by: Justin Madru <jdm64@gawab.com> Tested-by: Justin Madru <jdm64@gawab.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-21x86: use early clobbers in usercopy*.cAndi Kleen
Impact: fix rare (but currently harmless) miscompile with certain configs and gcc versions Hugh Dickins noticed that strncpy_from_user() was miscompiled in some circumstances with gcc 4.3. Thanks to Hugh's excellent analysis it was easy to track down. Hugh writes: > Try building an x86_64 defconfig 2.6.29-rc1 kernel tree, > except not quite defconfig, switch CONFIG_PREEMPT_NONE=y > and CONFIG_PREEMPT_VOLUNTARY off (because it expands a > might_fault() there, which hides the issue): using a > gcc 4.3.2 (I've checked both openSUSE 11.1 and Fedora 10). > > It generates the following: > > 0000000000000000 <__strncpy_from_user>: > 0: 48 89 d1 mov %rdx,%rcx > 3: 48 85 c9 test %rcx,%rcx > 6: 74 0e je 16 <__strncpy_from_user+0x16> > 8: ac lods %ds:(%rsi),%al > 9: aa stos %al,%es:(%rdi) > a: 84 c0 test %al,%al > c: 74 05 je 13 <__strncpy_from_user+0x13> > e: 48 ff c9 dec %rcx > 11: 75 f5 jne 8 <__strncpy_from_user+0x8> > 13: 48 29 c9 sub %rcx,%rcx > 16: 48 89 c8 mov %rcx,%rax > 19: c3 retq > > Observe that "sub %rcx,%rcx; mov %rcx,%rax", whereas gcc 4.2.1 > (and many other configs) say "sub %rcx,%rdx; mov %rdx,%rax". > Isn't it returning 0 when it ought to be returning strlen? The asm constraints for the strncpy_from_user() result were missing an early clobber, which tells gcc that the last output arguments are written before all input arguments are read. Also add more early clobbers in the rest of the file and fix 32-bit usercopy.c in the same way. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com> [ since this API is rarely used and no in-kernel user relies on a 'len' return value (they only rely on negative return values) this miscompile was never noticed in the field. But it's worth fixing it nevertheless. ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-21sh: ap325rxa MMC support using spi_gpio and mmc_spiMagnus Damm
This patch adds CN3 MMC support for ap325rxa using the mmc_spi driver on top of the bitbanging spi_gpio driver. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-01-21sh: mach-x3proto: needs linux/irq.h.Paul Mundt
Since commit ba84be2338d3a2b6020d39279335bb06fcd332e1 ("remove linux/hardirq.h from asm-generic/local.h"), the asm/irq.h definitions that mach-x3proto/setup.c depends on are no longer available, causing the build to die. So, include linux/irq.h explicitly. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-01-21sh: Drop the BKL from sys_execve() on SH-5.Paul Mundt
Brings it in line with the SH implementation, the BKL is not necessary here. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-01-21sh: convert rsk7203 to use smsc911x.Steve Glendinning
Signed-off-by: Steve Glendinning <steve.glendinning@smsc.com> Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-01-21sh: convert magicpanelr2 platform to use smsc911x.Steve Glendinning
Signed-off-by: Steve Glendinning <steve.glendinning@smsc.com> Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-01-21sh: convert ap325rxa platform to use smsc911x.Steve Glendinning
Signed-off-by: Steve Glendinning <steve.glendinning@smsc.com> Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>