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2010-12-06ARM: hw_breakpoint: unify single-stepping code for watchpoints and breakpointsWill Deacon1-2/+2
The single-stepping code is currently different depending on whether we are stepping over a breakpoint or a watchpoint. There is no good reason for this, so let's sort it out. This patch adds functions for enabling/disabling single-step for a particular hw_breakpoint and integrates this with the exception handling code. Signed-off-by: Will Deacon <will.deacon@arm.com>
2010-12-06ARM: hw_breakpoint: do not allocate new breakpoints with preemption disabledWill Deacon1-1/+1
The watchpoint single-stepping code calls register_user_hw_breakpoint to register a mismatch breakpoint for stepping over the watchpoint. This is performed with preemption disabled, which is unsafe as we may end up scheduling whilst in_atomic(). Furthermore, using the perf API is rather overkill since we are already in the hw-breakpoint backend and only require access to reserved breakpoints anyway. This patch reworks the watchpoint stepping code so that we don't require another perf_event for the mismatch breakpoint. Instead, we hold a separate arch_hw_breakpoint_ctrl struct inside the watchpoint which is used exclusively for stepping. We can check whether or not stepping is enabled when installing or uninstalling the watchpoint and operate on the breakpoint accordingly. Signed-off-by: Will Deacon <will.deacon@arm.com>
2010-12-05ARM: implement support for read-mostly sectionsRussell King1-0/+2
As our SMP implementation uses MESI protocols. Grouping together data which is mostly only read together means that we avoid unnecessary cache line bouncing when this code shares a cache line with other data. In other words, cache lines associated with read-mostly data are expected to spend most of their time in shared state. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-04ARM: 6518/1: kexec: Fix crash_setup_regs() for ARMv7 and CONFIG_THUMB2_KERNELDave Martin1-4/+14
* Fix kexec build failure with CONFIG_THUMB2_KERNEL. * Avoids deprecated/forbidden sp and pc usage in for ARMv7 onwards, retaining compatibility with older architecture versions. * The pc value saved to newregs is now aligned on a predictable instruction boundary. (stmia { ... pc } or str pc has implementation-defined results in most versions of the ARM architecutre, and is prohibited (unpredictable) in Thumb-2.) * Switch to named inline asm arguments (else I get readily confused ...) The resulting code should be compatible with all architecture versions >= v3, with or without CONFIG_THUMB2_KERNEL. Reviewed-by: Will Deacon <will.deacon@arm.com> Tested-by: Mika Westerberg <mika.westerberg@iki.fi> Signed-off-by: Dave Martin <dave.martin@linaro.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-04ARM: 6517/1: kexec: Add missing memory clobber to inline asm in crash_setup_regs()Dave Martin1-1/+1
Currently, the inline asm is passed &newregs->ARM_r0 as in input, when modifying multiple fields of newregs. It's plausible to assume that GCC will assume newregs->ARM_r0 is modified when passed the address, but unfortunately this assumption is incorrect. Also, GCC has no way to guess that the other ARM_r* fields are modified without the addition of a "memory" clobber. Signed-off-by: Dave Martin <dave.martin@linaro.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-03ARM: SMP: pass an ipi number to smp_cross_call()Russell King1-2/+2
This allows us to use smp_cross_call() to trigger a number of different software generated interrupts, rather than combining them all on one SGI. Recover the SGI number via do_IPI. Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-01ARM: module: clean up handling of ELF unwind tablesRussell King1-10/+5
There's no need to keep pointers to the ELF sections available while the module is loaded - we only need the section pointers while we're finding and registering the unwind tables, which can all be done during the finalize stage of loading. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-11-30ARM: 6486/1: provide zero vmcore_elf64_check_arch()Mika Westerberg1-0/+2
Since we don't support 64-bit ELF vmcores. This also prevents the following warning: fs/proc/vmcore.c: In function 'parse_crash_elf64_headers': fs/proc/vmcore.c:502: warning: passing argument 1 of 'elf_check_arch' from incompatible pointer type Signed-off-by: Mika Westerberg <mika.westerberg@iki.fi> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-11-26ARM: pgtable: introduce pteval_t to represent a pte valueRussell King2-22/+25
This makes everywhere dealing with pte values use the same type. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-11-26ARM: pgtable: use phys_addr_t for physical addressesRussell King2-4/+6
Ensure that physical addresses are typed as phys_addr_t Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-11-26ARM: pgtable: get rid of get_pgd_slow()/free_pgd_slow()Russell King1-5/+2
These old names are just aliases for pgd_alloc/pgd_free. Just use the new names. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-11-26ARM: pgtable: directly pass pgd/pmd/pte to their error functionsRussell King1-6/+6
Rather than passing the pte value to __pte_error, pass the raw pte_t cookie instead. Do the same for pmd and pgd functions. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-11-26ARM: pgtable: group pte functions togetherRussell King1-59/+51
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-11-26ARM: pgtable: group pgd functions and data togetherRussell King1-21/+23
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-11-26ARM: pgtable: move pgprot functions to one placeRussell King1-22/+21
Rather than scattering them throughout the file, group them together. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-11-26ARM: 6483/1: arm & sh: factorised duplicated clkdev.cJean-Christop PLAGNIOL-VILLARD1-16/+6
factorise some generic infrastructure to assist looking up struct clks for the ARM & SH architecture. as the code is identical at 99% put the arch specific code for allocation as example in asm/clkdev.h Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-11-26Merge branch 'ftrace' of git://github.com/rabinv/linux-2.6 into devel-stableRussell King2-2/+26
2010-11-23ARM: 6490/1: MM: bugfix: initialize spinlock for init_mm.contextMyungJoo Ham1-0/+4
init_mm used at kernel/sched.c:idle_task_exit() has spin_lock (init_mm.context.id_lock) that is not initialized when spin_lock/unlock is called at an ARM machine. Note that mm_struct.context.id_lock is usually initialized except for the instance of init_mm at linux/arch/arm/mm/context.c Not initializing this spinlock incurs "BUG: pinlock bad magic" warning when spinlock debug is enabled. We have observed such instances when testing PM in S5PC210 machines. Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-11-21ARM: 6489/1: thumb2: fix incorrect optimisation in usraccWill Deacon1-1/+1
Commit 8b592783 added a Thumb-2 variant of usracc which, when it is called with \rept=2, calls usraccoff once with an offset of 0 and secondly with a hard-coded offset of 4 in order to avoid incrementing the pointer again. If \inc != 4 then we will store the data to the wrong offset from \ptr. Luckily, the only caller that passes \rept=2 to this function is __clear_user so we haven't been actively corrupting user data. This patch fixes usracc to pass \inc instead of #4 to usraccoff when it is called a second time. Cc: <stable@kernel.org> Reported-by: Tony Thompson <tony.thompson@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-11-21ARM: improve compiler's ability to optimize page tablesRussell King1-0/+3
Allow the compiler to better optimize the page table walking code by avoiding over-complex pmd_addr_end() calculations. These calculations prevent the compiler spotting that we'll never iterate over the PMD table, causing it to create double nested loops where a single loop will do. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-11-19ARM: place C irq handlers in IRQ_ENTRY for ftraceRabin Vincent2-2/+26
When FUNCTION_GRAPH_TRACER is enabled, place do_IRQ() and friends in the IRQ_ENTRY section so that the irq-related features of the function graph tracer work. Signed-off-by: Rabin Vincent <rabin@rab.in>
2010-11-04ARM: 6432/1: move timer-sp.c from versatile to commonRob Herring1-0/+2
From: Rob Herring <rob.herring@smooth-stone.com> The timer-sp h/w used on versatile platforms can also be used for other platforms, so move it to a common location. Signed-off-by: Rob Herring <rob.herring@smooth-stone.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-11-04ARM: 6384/1: Remove the domain switching on ARMv6k/v7 CPUsCatalin Marinas5-20/+51
This patch removes the domain switching functionality via the set_fs and __switch_to functions on cores that have a TLS register. Currently, the ioremap and vmalloc areas share the same level 1 page tables and therefore have the same domain (DOMAIN_KERNEL). When the kernel domain is modified from Client to Manager (via the __set_fs or in the __switch_to function), the XN (eXecute Never) bit is overridden and newer CPUs can speculatively prefetch the ioremap'ed memory. Linux performs the kernel domain switching to allow user-specific functions (copy_to/from_user, get/put_user etc.) to access kernel memory. In order for these functions to work with the kernel domain set to Client, the patch modifies the LDRT/STRT and related instructions to the LDR/STR ones. The user pages access rights are also modified for kernel read-only access rather than read/write so that the copy-on-write mechanism still works. CPU_USE_DOMAINS gets disabled only if the hardware has a TLS register (CPU_32v6K is defined) since writing the TLS value to the high vectors page isn't possible. The user addresses passed to the kernel are checked by the access_ok() function so that they do not point to the kernel space. Tested-by: Anton Vorontsov <cbouatmailru@gmail.com> Cc: Tony Lindgren <tony@atomide.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-11-03ARM: pxa: fix the missing definition of IRQ_BOARD_ENDEric Miao1-1/+1
Signed-off-by: Eric Miao <eric.y.miao@gmail.com> Cc: Haojian Zhuang <haojian.zhuang@marvell.com> Cc: Mike Rapoport <mike@compulab.co.il>
2010-10-30Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds3-10/+34
* 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (215 commits) ARM: memblock: setup lowmem mappings using memblock ARM: memblock: move meminfo into find_limits directly ARM: memblock: convert free_highpages() to use memblock ARM: move freeing of highmem pages out of mem_init() ARM: memblock: convert memory detail printing to use memblock ARM: memblock: use memblock to free memory into arm_bootmem_init() ARM: memblock: use memblock when initializing memory allocators ARM: ensure membank array is always sorted ARM: 6466/1: implement flush_icache_all for the rest of the CPUs ARM: 6464/2: fix spinlock recursion in adjust_pte() ARM: fix memblock breakage ARM: 6465/1: Fix data abort accessing proc_info from __lookup_processor_type ARM: 6460/1: ixp2000: fix type of ixp2000_timer_interrupt ARM: 6449/1: Fix for compiler warning of uninitialized variable. ARM: 6445/1: fixup TCM memory types ARM: imx: Add wake functionality to GPIO ARM: mx5: Add gpio-keys to mx51 babbage board ARM: imx: Add gpio-keys to plat-mxc mx31_3ds: Fix spi registration mx31_3ds: Fix the logic for detecting the debug board ...
2010-10-29kgdb,arm: fix register dumpRabin Vincent1-2/+3
DBG_MAX_REG_NUM incorrectly had the number of indices in the GDB regs array rather than the number of registers, leading to an oops when the "rd" command is used in KDB. Cc: stable@kernel.org Signed-off-by: Rabin Vincent <rabin@rab.in> Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2010-10-28Merge branch 'devel-stable' into develRussell King2-3/+34
2010-10-28Merge branch 'l2x0-pull-rmk' of git://dev.omapzoom.org/pub/scm/santosh/kernel-omap4-base into devel-stableRussell King2-3/+30
2010-10-28Merge branch 'for-rmk' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into devel-stableRussell King1-0/+4
Conflicts: arch/arm/mach-s3c64xx/dev-audio.c
2010-10-27ARM: fix memblock breakageRussell King1-7/+0
Will says: | Commit e63075a3 removed the explicit MEMBLOCK_REAL_LIMIT #define | and introduced the requirement that arch code calls | memblock_set_current_limit to ensure that the __va macro can | be used on physical addresses returned from memblock_alloc. Unfortunately, ARM was missed out of this change. Fix this. Reported-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-10-26mm: remove pte_*map_nested()Peter Zijlstra1-8/+6
Since we no longer need to provide KM_type, the whole pte_*map_nested() API is now redundant, remove it. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Chris Metcalf <cmetcalf@tilera.com> Cc: David Howells <dhowells@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Rik van Riel <riel@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: David Miller <davem@davemloft.net> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26mm: stack based kmap_atomic()Peter Zijlstra1-3/+3
Keep the current interface but ignore the KM_type and use a stack based approach. The advantage is that we get rid of crappy code like: #define __KM_PTE \ (in_nmi() ? KM_NMI_PTE : \ in_irq() ? KM_IRQ_PTE : \ KM_PTE0) and in general can stop worrying about what context we're in and what kmap slots might be appropriate for that. The downside is that FRV kmap_atomic() gets more expensive. For now we use a CPP trick suggested by Andrew: #define kmap_atomic(page, args...) __kmap_atomic(page) to avoid having to touch all kmap_atomic() users in a single patch. [ not compiled on: - mn10300: the arch doesn't actually build with highmem to begin with ] [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: fix up drivers/gpu/drm/i915/intel_overlay.c] Acked-by: Rik van Riel <riel@redhat.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Chris Metcalf <cmetcalf@tilera.com> Cc: David Howells <dhowells@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: David Miller <davem@davemloft.net> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Dave Airlie <airlied@linux.ie> Cc: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26ARM: l2x0: Determine the cache sizeSantosh Shilimkar1-0/+1
The cache size is needed for to optimise range based maintainance operations Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Linus Walleij <linus.walleij@stericsson.com>
2010-10-26ARM: l2x0: Fix coding-style in the cache-l2x0.hSantosh Shilimkar1-3/+5
Replace tab with space after #define to be consisten with other define in the file. Also move the bit mask below the register offsets. Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Linus Walleij <linus.walleij@stericsson.com>
2010-10-26arm: Disable outer (L2) cache in kexecThomas Gleixner1-0/+24
kexec does not disable the outer cache before disabling the inner caches in cpu_proc_fin(). So L2 is enabled across the kexec jump. When the new kernel enables chaches again, it randomly crashes. Disabling L2 before calling cpu_proc_fin() cures the problem. Disabling L2 requires the following new functions: flush_all(), inv_all() and disable(). Add them to outer_cache_fns and call them from the kexec code. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Linus Walleij <linus.walleij@stericsson.com>
2010-10-25ARM: Add L2X0 PREFETCH and POWER control registerKyungmin Park1-0/+4
This patch adds L2X0 Prefetch and Power control register. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2010-10-24Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivialLinus Torvalds1-1/+1
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (39 commits) Update broken web addresses in arch directory. Update broken web addresses in the kernel. Revert "drivers/usb: Remove unnecessary return's from void functions" for musb gadget Revert "Fix typo: configuation => configuration" partially ida: document IDA_BITMAP_LONGS calculation ext2: fix a typo on comment in ext2/inode.c drivers/scsi: Remove unnecessary casts of private_data drivers/s390: Remove unnecessary casts of private_data net/sunrpc/rpc_pipe.c: Remove unnecessary casts of private_data drivers/infiniband: Remove unnecessary casts of private_data drivers/gpu/drm: Remove unnecessary casts of private_data kernel/pm_qos_params.c: Remove unnecessary casts of private_data fs/ecryptfs: Remove unnecessary casts of private_data fs/seq_file.c: Remove unnecessary casts of private_data arm: uengine.c: remove C99 comments arm: scoop.c: remove C99 comments Fix typo configue => configure in comments Fix typo: configuation => configuration Fix typo interrest[ing|ed] => interest[ing|ed] Fix various typos of valid in comments ... Fix up trivial conflicts in: drivers/char/ipmi/ipmi_si_intf.c drivers/usb/gadget/rndis.c net/irda/irnet/irnet_ppp.c
2010-10-22Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6Linus Torvalds1-82/+1
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6: (49 commits) serial8250: ratelimit "too much work" error serial: bfin_sport_uart: speed up sport RX sample rate to be 3% faster serial: abstraction for 8250 legacy ports serial/imx: check that the buffer is non-empty before sending it out serial: mfd: add more baud rates support jsm: Remove the uart port on errors Alchemy: Add UART PM methods. 8250: allow platforms to override PM hook. altera_uart: Don't use plain integer as NULL pointer altera_uart: Fix missing prototype for registering an early console altera_uart: Fixup type usage of port flags altera_uart: Make it possible to use Altera UART and 8250 ports together altera_uart: Add support for different address strides altera_uart: Add support for getting mapbase and IRQ from resources altera_uart: Add support for polling mode (IRQ-less) serial: Factor out uart_poll_timeout() from 8250 driver serial: mark the 8250 driver as maintained serial: 8250: Don't delay after transmitter is ready. tty: MAINTAINERS: add drivers/serial/jsm/ as maintained driver vcs: invoke the vt update callback when /dev/vcs* is written to ...
2010-10-22ioctl: Use asm-generic/ioctls.h on arm (enables termiox)Jeff Mahoney1-82/+1
This patch converts arm to use asm-generic/ioctls.h instead of its own version. The differences between the arch-specific version and the generic version are as follows: - ARM defines its own value for FIOQSIZE, asm-generic/ioctls.h keeps it - The generic version adds support for termiox Reviewed-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-21Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds20-80/+410
* 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (278 commits) arm: remove machine_desc.io_pg_offst and .phys_io arm: use addruart macro to establish debug mappings arm: return both physical and virtual addresses from addruart arm/debug: consolidate addruart macros for CONFIG_DEBUG_ICEDCC ARM: make struct machine_desc definition coherent with its comment eukrea_mbimxsd-baseboard: Pass the correct GPIO to gpio_free cpuimx27: fix compile when ULPI is selected mach-pcm037_eet: fix compile errors Fixing ethernet driver compilation error for i.MX31 ADS board cpuimx51: update board support mx5: add cpuimx51sd module and its baseboard iomux-mx51: fix GPIO_1_xx 's IOMUX configuration imx-esdhc: update devices registration mx51: add resources for SD/MMC on i.MX51 iomux-mx51: fix SD1 and SD2's iomux configuration clock-mx51: rename CLOCK1 to CLOCK_CCGR for better readability clock-mx51: factorize clk_set_parent and clk_get_rate eukrea_mbimxsd: add support for DVI displays cpuimx25 & cpuimx35: fix OTG port registration in host mode i.MX31 and i.MX35 : fix errate TLSbo65953 and ENGcm09472 ...
2010-10-21Merge git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-2.6-irqflagsLinus Torvalds1-61/+84
* git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-2.6-irqflags: Fix IRQ flag handling naming MIPS: Add missing #inclusions of <linux/irq.h> smc91x: Add missing #inclusion of <linux/irq.h> Drop a couple of unnecessary asm/system.h inclusions SH: Add missing consts to sys_execve() declaration Blackfin: Rename IRQ flags handling functions Blackfin: Add missing dep to asm/irqflags.h Blackfin: Rename DES PC2() symbol to avoid collision Blackfin: Split the BF532 BFIN_*_FIO_FLAG() functions to their own header Blackfin: Split PLL code from mach-specific cdef headers
2010-10-21Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tipLinus Torvalds1-0/+2
* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (96 commits) apic, x86: Use BIOS settings for IBS and MCE threshold interrupt LVT offsets apic, x86: Check if EILVT APIC registers are available (AMD only) x86: ioapic: Call free_irte only if interrupt remapping enabled arm: Use ARCH_IRQ_INIT_FLAGS genirq, ARM: Fix boot on ARM platforms genirq: Fix CONFIG_GENIRQ_NO_DEPRECATED=y build x86: Switch sparse_irq allocations to GFP_KERNEL genirq: Switch sparse_irq allocator to GFP_KERNEL genirq: Make sparse_lock a mutex x86: lguest: Use new irq allocator genirq: Remove the now unused sparse irq leftovers genirq: Sanitize dynamic irq handling genirq: Remove arch_init_chip_data() x86: xen: Sanitise sparse_irq handling x86: Use sane enumeration x86: uv: Clean up the direct access to irq_desc x86: Make io_apic.c local functions static genirq: Remove irq_2_iommu x86: Speed up the irq_remapped check in hot pathes intr_remap: Simplify the code further ... Fix up trivial conflicts in arch/x86/Kconfig
2010-10-20arm: remove machine_desc.io_pg_offst and .phys_ioNicolas Pitre1-5/+1
Since we're now using addruart to establish the debug mapping, we can remove the io_pg_offst and phys_io members of struct machine_desc. The various declarations were removed using the following script: grep -rl MACHINE_START arch/arm | xargs \ sed -i '/MACHINE_START/,/MACHINE_END/ { /\.\(phys_io\|io_pg_offst\)/d }' [ Initial patch was from Jeremy Kerr, example script from Russell King ] Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org> Acked-by: Eric Miao <eric.miao at canonical.com>
2010-10-20ARM: make struct machine_desc definition coherent with its commentNicolas Pitre1-1/+2
As mentioned in the comment right at the top, the first four fields are directly accessed by assembly code in head.S. Move nr_irqs so the comment is true again. Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org>
2010-10-19Merge branch 'devel-stable' into develRussell King5-1/+46
2010-10-18Merge branches 'at91', 'dcache', 'ftrace', 'hwbpt', 'misc', 'mmci', 's3c', 'st-ux' and 'unwind' into develRussell King17-82/+369
2010-10-18irq_work: Add generic hardirq context callbacksPeter Zijlstra1-12/+0
Provide a mechanism that allows running code in IRQ context. It is most useful for NMI code that needs to interact with the rest of the system -- like wakeup a task to drain buffers. Perf currently has such a mechanism, so extract that and provide it as a generic feature, independent of perf so that others may also benefit. The IRQ context callback is generated through self-IPIs where possible, or on architectures like powerpc the decrementer (the built-in timer facility) is set to generate an interrupt immediately. Architectures that don't have anything like this get to do with a callback from the timer tick. These architectures can call irq_work_run() at the tail of any IRQ handlers that might enqueue such work (like the perf IRQ handler) to avoid undue latencies in processing the work. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Kyle McMartin <kyle@mcmartin.ca> Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> [ various fixes ] Signed-off-by: Huang Ying <ying.huang@intel.com> LKML-Reference: <1287036094.7768.291.camel@yhuang-dev> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-10-18Update broken web addresses in arch directory.Justin P. Mattock1-1/+1
The patch below updates broken web addresses in the arch directory. Signed-off-by: Justin P. Mattock <justinmattock@gmail.com> Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: Finn Thain <fthain@telegraphics.com.au> Cc: Randy Dunlap <rdunlap@xenotime.net> Reviewed-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-10-16arm: Use ARCH_IRQ_INIT_FLAGSThomas Gleixner1-0/+2
The core code now initializes the requested number of interrupts and sets the flags in irq_desc.status which are requested by the architecture via ARCH_IRQ_INIT_FLAGS. Add ARCH_IRQ_INIT_FLAGS and remove the loop which sets those flags after the irq descriptors are allocated. [ This patch should have been in the original irq rework and got dropped accidentaly ] Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Russell King <linux@arm.linux.org.uk> Cc: Linus Walleij <linus.walleij@stericsson.com> Cc: Anand Gadiyar <gadiyar@ti.com>
2010-10-08ARM: 6428/1: add cpu_idle_wait() to support CPUidle on SMP systems.Kevin Hilman1-0/+2
In order for CPUidle to work on SMP systems, an implementation of cpu_idle_wait() is needed. This patch duplicates the x86 implementation of cpu_idle_wait() for ARM. Tested-by: Colin Cross <ccross@android.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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