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2009-06-25kmemleak: Allow the early log buffer to be configurable.Catalin Marinas1-0/+12
(feature suggested by Sergey Senozhatsky) Kmemleak needs to track all the memory allocations but some of these happen before kmemleak is initialised. These are stored in an internal buffer which may be exceeded in some kernel configurations. This patch adds a configuration option with a default value of 400 and also removes the stack dump when the early log buffer is exceeded. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Sergey Senozhatsky <sergey.senozhatsky@mail.by>
2009-06-24percpu: implement optional weak percpu definitionsTejun Heo1-0/+15
Some archs (alpha and s390) need to use weak definitions for percpu variables in modules so that the compiler generates external references for them. This patch implements weak percpu definitions which arch can enable by defining ARCH_NEEDS_WEAK_PER_CPU in arch percpu header file. This weak definition adds the following two restrictions on percpu variable definitions. 1. percpu symbols must be unique whether static or not 2. percpu variables can't be defined inside a function To ensure that these restrictions are observed in generic code, config option DEBUG_FORCE_WEAK_PER_CPU enables weak percpu definitions for all cases. This patch is inspired by Ivan Kokshaysky's alpha percpu patch. [ Impact: stricter rules for percpu variables, one more debug config option ] Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Howells <dhowells@redhat.com> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
2009-06-23Merge branch 'for-linus' of ↵Linus Torvalds1-1/+9
git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: asm-generic: add dummy pgprot_noncached() lib/checksum.c: fix endianess bug asm-generic: hook up new system calls asm-generic: list Arnd as asm-generic maintainer asm-generic: drop HARDIRQ_BITS definition from hardirq.h asm-generic: uaccess: fix up local access_ok() usage asm-generic: uaccess: add missing access_ok() check to strnlen_user()
2009-06-23kmemleak: Do not force the slab debugging Kconfig optionsCatalin Marinas1-2/+3
Selecting DEBUG_SLAB or SLUB_DEBUG by the KMEMLEAK menu entry may cause issues with other dependencies (KMEMCHECK). These configuration options aren't strictly needed by kmemleak but they may increase the chances of finding leaks. This patch also updates the KMEMLEAK config entry help text. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
2009-06-21Merge branch 'core-fixes-for-linus' of ↵Linus Torvalds2-52/+99
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: lockdep: Select frame pointers on x86 dma-debug: be more careful when building reference entries dma-debug: check for sg_call_ents in best-fit algorithm too
2009-06-21lockdep: Select frame pointers on x86Peter Zijlstra1-1/+1
x86 stack traces are a piece of crap without frame pointers, and its not like the 'performance gain' of not having stack pointers matters when you selected lockdep. Reported-by: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <new-submission> Cc: <stable@kernel.org> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-19lib/checksum.c: fix endianess bugArnd Bergmann1-1/+9
The new generic checksum code has a small dependency on endianess and worked only on big-endian systems. I could not find a nice efficient way to express this, so I added an #ifdef. Using 'result += le16_to_cpu(*buff);' would have worked as well, but would be slightly less efficient on big-endian systems and IMHO would not be clearer. Also fix a bug that prevents this from working on 64-bit machines. If you have a 64-bit CPU and want to use the generic checksum code, you should probably do some more optimizations anyway, but at least the code should not break. Reported-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-06-18lib: add lib/gcd.cFlorian Fainelli2-1/+19
This patch adds lib/gcd.c which contains a greatest common divider implementation taken from sound/core/pcm_timer.c Several usages of this new library function will be sent to subsystem maintainers. [akpm@linux-foundation.org: use swap() (pointed out by Joe)] [akpm@linux-foundation.org: just add gcd.o to obj-y, remove Kconfig changes] Signed-off-by: Florian Fainelli <florian@openwrt.org> Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com> Cc: Takashi Iwai <tiwai@suse.de> Cc: Simon Horman <horms@verge.net.au> Cc: Julius Volz <juliusv@google.com> Cc: David S. Miller <davem@davemloft.net> Cc: Patrick McHardy <kaber@trash.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-17dma-debug: Put all hash-chain locks into the same lock classIngo Molnar1-1/+1
Alan Cox reported that lockdep runs out of its stack-trace entries with certain configs: BUG: MAX_STACK_TRACE_ENTRIES too low This happens because there are 1024 hash buckets, each with a separate lock. Lockdep puts each lock into a separate lock class and tracks them independently. But in reality we never take more than one of the buckets, so they really belong into a single lock-class. Annotate the has bucket lock init accordingly. [ Impact: reduce the lockdep footprint of dma-debug ] Reported-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-06-16Merge branch 'akpm'Linus Torvalds5-73/+90
* akpm: (182 commits) fbdev: bf54x-lq043fb: use kzalloc over kmalloc/memset fbdev: *bfin*: fix __dev{init,exit} markings fbdev: *bfin*: drop unnecessary calls to memset fbdev: bfin-t350mcqb-fb: drop unused local variables fbdev: blackfin has __raw I/O accessors, so use them in fb.h fbdev: s1d13xxxfb: add accelerated bitblt functions tcx: use standard fields for framebuffer physical address and length fbdev: add support for handoff from firmware to hw framebuffers intelfb: fix a bug when changing video timing fbdev: use framebuffer_release() for freeing fb_info structures radeon: P2G2CLK_ALWAYS_ONb tested twice, should 2nd be P2G2CLK_DAC_ALWAYS_ONb? s3c-fb: CPUFREQ frequency scaling support s3c-fb: fix resource releasing on error during probing carminefb: fix possible access beyond end of carmine_modedb[] acornfb: remove fb_mmap function mb862xxfb: use CONFIG_OF instead of CONFIG_PPC_OF mb862xxfb: restrict compliation of platform driver to PPC Samsung SoC Framebuffer driver: add Alpha Channel support atmel-lcdc: fix pixclock upper bound detection offb: use framebuffer_alloc() to allocate fb_info struct ... Manually fix up conflicts due to kmemcheck in mm/slab.c
2009-06-16rb_tree: remove redundant if()-condition in rb_erase()Wolfram Strepp1-4/+4
Furthermore, notice that the initial checks: if (!node->rb_left) child = node->rb_right; else if (!node->rb_right) child = node->rb_left; else { ... } guarantee that old->rb_right is set in the final else branch, therefore we can omit checking that again. Signed-off-by: Wolfram Strepp <wstrepp@gmx.de> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-16rb_tree: make clear distinction between two different cases in rb_erase()Wolfram Strepp1-4/+4
There are two cases when a node, having 2 childs, is erased: 'normal case': the successor is not the right-hand-child of the node to be erased 'special case': the successor is the right-hand child of the node to be erased Here some ascii-art, with following symbols (referring to the code): O: node to be deleted N: the successor of O P: parent of N C: child of N L: some other node normal case: O N / \ / \ / \ / \ L \ L \ / \ P ----> / \ P / \ / \ / / N C \ / \ \ C / \ special case: O|P N / \ / \ / \ / \ L \ L \ / \ N ----> / C \ / \ \ C / \ Notice that for the special case we don't have to reconnect C to N. Signed-off-by: Wolfram Strepp <wstrepp@gmx.de> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-16rb_tree: reorganize code in rb_erase() for additional changesWolfram Strepp1-9/+9
First, move some code around in order to make the next change more obvious. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Wolfram Strepp <wstrepp@gmx.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-16lib/genalloc.c: remove unmatched write_lock() in gen_pool_destroyZygo Blaxell1-1/+0
There is a call to write_lock() in gen_pool_destroy which is not balanced by any corresponding write_unlock(). This causes problems with preemption because the preemption-disable counter is incremented in the write_lock() call, but never decremented by any call to write_unlock(). This bug is gen_pool_destroy, and one of them is non-x86 arch-specific code. Signed-off-by: Zygo Blaxell <zygo.blaxell@xandros.com> Cc: Jiri Kosina <trivial@kernel.org> Cc: Steve Wise <swise@opengridcomputing.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-16hexdump: remove the trailing spaceLi Zefan1-6/+9
For example: hex_dump_to_buffer("AB", 2, 16, 1, buf, 100, 0); pr_info("[%s]\n", buf); I'd expect the output to be "[41 42]", but actually it's "[41 42 ]" This patch also makes the required buf to be minimum. To print the hex format of "AB", a buf with size 6 should be sufficient, but hex_dump_to_buffer() required at least 8. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-16lib: do code optimization for radix_tree_lookup() and radix_tree_lookup_slot()Huang Shijie1-47/+26
radix_tree_lookup() and radix_tree_lookup_slot() have much the same code except for the return value. Introduce radix_tree_lookup_element() to do the real work. /* * is_slot == 1 : search for the slot. * is_slot == 0 : search for the node. */ static void * radix_tree_lookup_element(struct radix_tree_root *root, unsigned long index, int is_slot); Signed-off-by: Huang Shijie <shijie8@gmail.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Christoph Lameter <cl@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-16atomic: only take lock when the counter drops to zero on UP as wellJan Blunck1-2/+1
_atomic_dec_and_lock() should not unconditionally take the lock before calling atomic_dec_and_test() in the UP case. For consistency reasons it should behave exactly like in the SMP case. Besides that this works around the problem that with CONFIG_DEBUG_SPINLOCK this spins in __spin_lock_debug() if the lock is already taken even if the counter doesn't drop to 0. Signed-off-by: Jan Blunck <jblunck@suse.de> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Nick Piggin <npiggin@suse.de> Cc: Valerie Aurora <vaurora@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-16radix-tree: add radix_tree_prev_hole()Wu Fengguang1-0/+37
The counterpart of radix_tree_next_hole(). To be used by context readahead. Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Cc: Vladislav Bolkhovitin <vst@vlnb.net> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Ying Han <yinghan@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-16Merge branch 'for-linus2' of ↵Linus Torvalds2-2/+95
git://git.kernel.org/pub/scm/linux/kernel/git/vegard/kmemcheck * 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/vegard/kmemcheck: (39 commits) signal: fix __send_signal() false positive kmemcheck warning fs: fix do_mount_root() false positive kmemcheck warning fs: introduce __getname_gfp() trace: annotate bitfields in struct ring_buffer_event net: annotate struct sock bitfield c2port: annotate bitfield for kmemcheck net: annotate inet_timewait_sock bitfields ieee1394/csr1212: fix false positive kmemcheck report ieee1394: annotate bitfield net: annotate bitfields in struct inet_sock net: use kmemcheck bitfields API for skbuff kmemcheck: introduce bitfield API kmemcheck: add opcode self-testing at boot x86: unify pte_hidden x86: make _PAGE_HIDDEN conditional kmemcheck: make kconfig accessible for other architectures kmemcheck: enable in the x86 Kconfig kmemcheck: add hooks for the page allocator kmemcheck: add hooks for page- and sg-dma-mappings kmemcheck: don't track page tables ...
2009-06-16Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6Linus Torvalds1-1/+6
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6: (64 commits) debugfs: use specified mode to possibly mark files read/write only debugfs: Fix terminology inconsistency of dir name to mount debugfs filesystem. xen: remove driver_data direct access of struct device from more drivers usb: gadget: at91_udc: remove driver_data direct access of struct device uml: remove driver_data direct access of struct device block/ps3: remove driver_data direct access of struct device s390: remove driver_data direct access of struct device parport: remove driver_data direct access of struct device parisc: remove driver_data direct access of struct device of_serial: remove driver_data direct access of struct device mips: remove driver_data direct access of struct device ipmi: remove driver_data direct access of struct device infiniband: ehca: remove driver_data direct access of struct device ibmvscsi: gadget: at91_udc: remove driver_data direct access of struct device hvcs: remove driver_data direct access of struct device xen block: remove driver_data direct access of struct device thermal: remove driver_data direct access of struct device scsi: remove driver_data direct access of struct device pcmcia: remove driver_data direct access of struct device PCIE: remove driver_data direct access of struct device ... Manually fix up trivial conflicts due to different direct driver_data direct access fixups in drivers/block/{ps3disk.c,ps3vram.c}
2009-06-16dma-debug: fix off-by-one error in overlap functionJoerg Roedel1-1/+1
This patch fixes a bug in the overlap function which returned true if one region ends exactly before the second region begins. This is no overlap but the function returned true in that case. Cc: stable@kernel.org Reported-by: Andrew Randrianasulu <randrik@mail.ru> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-06-15kobject: make kset_create check kobject_set_name return valueDave Young1-1/+6
kset_create should check the kobject_set_name return value. Add the return value checking code. Signed-off-by: Dave Young <hidave.darkstar@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-06-15Merge commit 'linus/master' into HEADVegard Nossum3-1/+215
Conflicts: MAINTAINERS Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
2009-06-15kmemcheck: make kconfig accessible for other architecturesPekka Enberg2-0/+93
The Kconfig options of kmemcheck are hidden under arch/x86 which makes porting to other architectures harder. To fix that, move the Kconfig bits to lib/Kconfig.kmemcheck and introduce a CONFIG_HAVE_ARCH_KMEMCHECK config option that architectures can define. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> [rebased for mainline inclusion] Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
2009-06-15kmemcheck: enable in the x86 KconfigVegard Nossum1-2/+2
let it rip! Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu> [rebased for mainline inclusion] Signed-off-by: Vegard Nossum <vegardno@ifi.uio.no>
2009-06-15dma-debug: be more careful when building reference entriesJoerg Roedel1-43/+91
The current code is not very careful when it builds reference dma_debug_entries which get passed to hash_bucket_find(). But since this function changed to a best-fit algorithm these entries have to be more acurate. This patch adds this higher level of accuracy. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-06-15dma-debug: check for sg_call_ents in best-fit algorithm tooJoerg Roedel1-8/+7
If we don't check for sg_call_ents the hash_bucket_find function might still return the wrong dma_debug_entry for sg mappings. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-06-15lib: Provide generic atomic64_t implementationPaul Mackerras3-0/+183
Many processor architectures have no 64-bit atomic instructions, but we need atomic64_t in order to support the perf_counter subsystem. This adds an implementation of 64-bit atomic operations using hashed spinlocks to provide atomicity. For each atomic operation, the address of the atomic64_t variable is hashed to an index into an array of 16 spinlocks. That spinlock is taken (with interrupts disabled) around the operation, which can then be coded non-atomically within the lock. On UP, all the spinlock manipulation goes away and we simply disable interrupts around each operation. In fact gcc eliminates the whole atomic64_lock variable as well. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-06-12Merge branch 'for-linus' of ↵Linus Torvalds2-0/+195
git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: add generic lib/checksum.c asm-generic: add a generic uaccess.h asm-generic: add generic NOMMU versions of some headers asm-generic: add generic atomic.h and io.h asm-generic: add legacy I/O header files asm-generic: add generic versions of common headers asm-generic: make bitops.h usable asm-generic: make pci.h usable directly asm-generic: make get_rtc_time overridable asm-generic: rename page.h and uaccess.h asm-generic: rename atomic.h to atomic-long.h asm-generic: add a generic unistd.h asm-generic: add generic ABI headers asm-generic: add generic sysv ipc headers asm-generic: introduce asm/bitsperlong.h asm-generic: rename termios.h, signal.h and mman.h
2009-06-12module: trim exception table on init free.Rusty Russell1-1/+20
It's theoretically possible that there are exception table entries which point into the (freed) init text of modules. These could cause future problems if other modules get loaded into that memory and cause an exception as we'd see the wrong fixup. The only case I know of is kvm-intel.ko (when CONFIG_CC_OPTIMIZE_FOR_SIZE=n). Amerigo fixed this long-standing FIXME in the x86 version, but this patch is more general. This implements trim_init_extable(); most archs are simple since they use the standard lib/extable.c sort code. Alpha and IA64 use relative addresses in their fixups, so thier trimming is a slight variation. Sparc32 is unique; it doesn't seem to define ARCH_HAS_SORT_EXTABLE, yet it defines its own sort_extable() which overrides the one in lib. It doesn't sort, so we have to mark deleted entries instead of actually trimming them. Inspired-by: Amerigo Wang <amwang@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: linux-alpha@vger.kernel.org Cc: sparclinux@vger.kernel.org Cc: linux-ia64@vger.kernel.org
2009-06-12asm-generic: merge branch 'master' of torvalds/linux-2.6Arnd Bergmann8-122/+594
Fixes a merge conflict against the x86 tree caused by a fix to atomic.h which I renamed to atomic_long.h. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-06-11Merge branch 'for-linus' of git://linux-arm.org/linux-2.6Linus Torvalds1-0/+32
* 'for-linus' of git://linux-arm.org/linux-2.6: kmemleak: Add the corresponding MAINTAINERS entry kmemleak: Simple testing module for kmemleak kmemleak: Enable the building of the memory leak detector kmemleak: Remove some of the kmemleak false positives kmemleak: Add modules support kmemleak: Add kmemleak_alloc callback from alloc_large_system_hash kmemleak: Add the vmalloc memory allocation/freeing hooks kmemleak: Add the slub memory allocation/freeing hooks kmemleak: Add the slob memory allocation/freeing hooks kmemleak: Add the slab memory allocation/freeing hooks kmemleak: Add documentation on the memory leak detector kmemleak: Add the base support Manual conflict resolution (with the slab/earlyboot changes) in: drivers/char/vt.c init/main.c mm/slab.c
2009-06-11Merge branch 'topic/slab/earlyboot' of ↵Linus Torvalds1-9/+2
git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6 * 'topic/slab/earlyboot' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6: vgacon: use slab allocator instead of the bootmem allocator irq: use kcalloc() instead of the bootmem allocator sched: use slab in cpupri_init() sched: use alloc_cpumask_var() instead of alloc_bootmem_cpumask_var() memcg: don't use bootmem allocator in setup code irq/cpumask: make memoryless node zero happy x86: remove some alloc_bootmem_cpumask_var calling vt: use kzalloc() instead of the bootmem allocator sched: use kzalloc() instead of the bootmem allocator init: introduce mm_init() vmalloc: use kzalloc() instead of alloc_bootmem() slab: setup allocators earlier in the boot sequence bootmem: fix slab fallback on numa bootmem: use slab if bootmem is no longer available
2009-06-11add generic lib/checksum.cArnd Bergmann2-0/+195
Add a generic (unoptimized) implementation of checksum.c in pure C for use by all architectures that cannot be bother with implementing their own version. Based on microblaze code by Michal Simek <monstr@monstr.eu> Cc: Michal Simek <monstr@monstr.eu> Signed-off-by: Remis Lima Baima <remis.developer@googlemail.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-06-11x86: remove some alloc_bootmem_cpumask_var callingYinghai Lu1-9/+2
Now that we set up the slab allocator earlier, we can get rid of some alloc_bootmem_cpumask_var() calls in boot code. Cc: Ingo Molnar <mingo@elte.hu> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
2009-06-11kmemleak: Simple testing module for kmemleakCatalin Marinas1-0/+10
This patch adds a loadable module that deliberately leaks memory. It is used for testing various memory leaking scenarios. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2009-06-11kmemleak: Enable the building of the memory leak detectorCatalin Marinas1-0/+22
This patch adds the Kconfig.debug and Makefile entries needed for building kmemleak into the kernel. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2009-06-11Merge branch 'serial-from-alan'Linus Torvalds3-0/+66
* serial-from-alan: (79 commits) moxa: prevent opening unavailable ports imx: serial: use tty_encode_baud_rate to set true rate imx: serial: add IrDA support to serial driver imx: serial: use rational library function lib: isolate rational fractions helper function imx: serial: handle initialisation failure correctly imx: serial: be sure to stop xmit upon shutdown imx: serial: notify higher layers in case xmit IRQ was not called imx: serial: fix one bit field type imx: serial: fix whitespaces (no changes in functionality) tty: use prepare/finish_wait tty: remove sleep_on sierra: driver interface blacklisting sierra: driver urb handling improvements tty: resolve some sierra breakage timbuart: Fix the termios logic serial: Added Timberdale UART driver tty: Add URL for ttydev queue devpts: unregister the file system on error tty: Untangle termios and mm mutex dependencies ...
2009-06-11lib: isolate rational fractions helper functionOskar Schirmer3-0/+66
Provide a helper function to determine optimum numerator denominator value pairs taking into account restricted register size. Useful especially with PLL and other clock configurations. Signed-off-by: Oskar Schirmer <os@emlix.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-10Merge branch 'printk-for-linus' of ↵Linus Torvalds1-11/+45
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'printk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: vsprintf: introduce %pf format specifier printk: add support of hh length modifier for printk
2009-06-10Merge branch 'iommu-for-linus' of ↵Linus Torvalds2-102/+449
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (61 commits) amd-iommu: remove unnecessary "AMD IOMMU: " prefix amd-iommu: detach device explicitly before attaching it to a new domain amd-iommu: remove BUS_NOTIFY_BOUND_DRIVER handling dma-debug: simplify logic in driver_filter() dma-debug: disable/enable irqs only once in device_dma_allocations dma-debug: use pr_* instead of printk(KERN_* ...) dma-debug: code style fixes dma-debug: comment style fixes dma-debug: change hash_bucket_find from first-fit to best-fit x86: enable GART-IOMMU only after setting up protection methods amd_iommu: fix lock imbalance dma-debug: add documentation for the driver filter dma-debug: add dma_debug_driver kernel command line dma-debug: add debugfs file for driver filter dma-debug: add variables and checks for driver filter dma-debug: fix debug_dma_sync_sg_for_cpu and debug_dma_sync_sg_for_device dma-debug: use sg_dma_len accessor dma-debug: use sg_dma_address accessor instead of using dma_address directly amd-iommu: don't free dma adresses below 512MB with CONFIG_IOMMU_STRESS amd-iommu: don't preallocate page tables with CONFIG_IOMMU_STRESS ...
2009-06-09cpumask: introduce zalloc_cpumask_varYinghai Lu1-0/+12
So can get cpumask_var with cpumask_clear Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2009-06-08dma-debug: simplify logic in driver_filter()Joerg Roedel1-21/+21
This patch makes the driver_filter function more readable by reorganizing the code. The removal of a code code block to an upper indentation level makes hard-to-read line-wraps unnecessary. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-06-08dma-debug: disable/enable irqs only once in device_dma_allocationsJoerg Roedel1-2/+6
There is no need to disable/enable irqs on each loop iteration. Just disable irqs for the whole time the loop runs. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-06-08dma-debug: use pr_* instead of printk(KERN_* ...)Joerg Roedel1-21/+15
The pr_* macros are shorter than the old printk(KERN_ ...) variant. Change the dma-debug code to use the new macros and save a few unnecessary line breaks. If lines don't break the source code can also be grepped more easily. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-06-08dma-debug: code style fixesJoerg Roedel1-11/+12
This patch changes the recent updates to dma-debug to conform with coding style guidelines of Linux and the -tip tree. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-06-08dma-debug: comment style fixesJoerg Roedel1-2/+3
Last patch series introduced some new comment which does not fit the Kernel comment style guidelines. Fix it with this patch. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-06-07Merge branch 'dma-debug/2.6.31' of ↵Ingo Molnar1-22/+269
git://git.kernel.org/pub/scm/linux/kernel/git/joro/linux-2.6-iommu into core/iommu
2009-06-07Merge branch 'linus' into core/iommuIngo Molnar1-1/+0
Merge reason: This branch was on an -rc5 base so pull almost-2.6.30 to resync with the latest upstream fixes and make sure the combination works fine. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-07dma-debug: change hash_bucket_find from first-fit to best-fitJoerg Roedel1-4/+39
Some device drivers map the same physical address multiple times to a dma address. Without an IOMMU this results in the same dma address being put into the dma-debug hash multiple times. With a first-fit match in hash_bucket_find() this function may return the wrong dma_debug_entry. This can result in false positive warnings. This patch fixes it by changing the first-fit behavior of hash_bucket_find() into a best-fit algorithm. Reported-by: Torsten Kaiser <just.for.lkml@googlemail.com> Reported-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: lethal@linux-sh.org Cc: just.for.lkml@googlemail.com Cc: hancockrwd@gmail.com Cc: jens.axboe@oracle.com Cc: bharrosh@panasas.com Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: <stable@kernel.org> LKML-Reference: <20090605104132.GE24836@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>