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2010-02-24virtio: console: Add a new MULTIPORT feature, support for generic portsAmit Shah
This commit adds a new feature, MULTIPORT. If the host supports this feature as well, the config space has the number of ports defined for that device. New ports are spawned according to this information. The config space also has the maximum number of ports that can be spawned for a particular device. This is useful in initializing the appropriate number of virtqueues in advance, as ports might be hot-plugged in later. Using this feature, generic ports can be created which are not tied to hvc consoles. We also open up a private channel between the host and the guest via which some "control" messages are exchanged for the ports, like whether the port being spawned is a console port, resizing the console window, etc. Next commits will add support for hotplugging and presenting char devices in /dev/ for bi-directional guest-host communication. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: console: Introduce a send_buf function for a common path for sending ↵Amit Shah
data to host Adding support for generic ports that will write to userspace will need some code changes. Consolidate the write routine into send_buf() and put_chars() now just calls into the new function. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: console: Introduce function to hand off data from host to readersAmit Shah
In preparation for serving data to userspace (generic ports) as well as in-kernel users (hvc consoles), separate out the functionality common to both in a 'fill_readbuf()' function. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: console: Separate out find_vqs operation into a different functionAmit Shah
With support for multiple ports, each port will have its own input and output vqs. Prepare the probe function for this change. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: console: Separate out console init into a new functionAmit Shah
Console ports could be hot-added. Also, with the new multiport support, a port is identified as a console port only if the host sends a control message. Move the console port init into a separate function so it can be invoked from other places. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: console: Separate out console-specific data into a separate structAmit Shah
Move out console-specific stuff into a separate struct from 'struct port' as we need to maintain two lists: one for all the ports (which includes consoles) and one only for consoles since the hvc callbacks only give us the vtermno. This makes console handling cleaner. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: console: ensure console size is updated on hvc openAmit Shah
When multiple console support is added, ensure each port's size gets updated when a new one is opened via hvc. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: console: struct ports for multiple ports per device.Amit Shah
Rather than assume a single port, add a 'struct ports_device' which stores data related to all the ports for that device. Currently, there's only one port and is hooked up with hvc, but that will change. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: console: remove global varRusty Russell
Now we can use an allocation function to remove our global console variable. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: console: don't assume a single console port.Amit Shah
Keep a list of all ports being used as a console, and provide a lock and a lookup function. The hvc callbacks only give us a vterm number, so we need to map this. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: console: use vdev->priv to avoid accessing global var.Rusty Russell
Part of removing our "one console" assumptions, use vdev->priv to point to the port (currently == the global console). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: console: introduce a get_inbuf helper to fetch bufs from in_vqAmit Shah
This makes taking locks around the get_buf vq operation easier, as well as complements the add_inbuf() operation. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: console: ensure add_inbuf can work for multiple ports as wellAmit Shah
add_inbuf() assumed one port and one inbuf per port. Remove that assumption. Also move the function so that put_chars and get_chars are together. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: console: encapsulate buffer information in a structAmit Shah
Collect port buffer, used_len, offset fields into a single structure. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: console: port encapsulationRusty Russell
We are heading towards a multiple-"port" system, so as part of weaning off globals we encapsulate the information into 'struct port'. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: console: We support only one device at a timeAmit Shah
We support only one virtio_console device at a time. If multiple are found, error out if one is already initialized. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24hvc_console: make the ops pointer const.Rusty Russell
This is nicer for modern R/O protection. And noone needs it non-const, so constify the callers as well. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Amit Shah <amit.shah@redhat.com> To: Christian Borntraeger <borntraeger@de.ibm.com> Cc: linuxppc-dev@ozlabs.org
2010-02-24virtio: console: statically initialize virtio_consRusty Russell
That way, we can make it const as is good kernel style. We use a separate indirection for the early console, rather than mugging ops.put_chars. We rename it hv_ops, too. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: console: comment cleanupRusty Russell
Remove old lguest-style comments. [Amit: - wingify comments acc. to kernel style - indent comments ] Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: Initialize vq->data entries to NULLAmit Shah
vq operations depend on vq->data[i] being NULL to figure out if the vq entry is in use (since the previous patch). We have to initialize them to NULL to ensure we don't work with junk data and trigger false BUG_ONs. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Shirley Ma <xma@us.ibm.com>
2010-02-24virtio: Add ability to detach unused buffers from vringsShirley Ma
There's currently no way for a virtio driver to ask for unused buffers, so it has to keep a list itself to reclaim them at shutdown. This is redundant, since virtio_ring stores that information. So add a new hook to do this. Signed-off-by: Shirley Ma <xma@us.ibm.com> Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio_blk: add block topology supportChristoph Hellwig
Allow reading various alignment values from the config page. This allows the guest to much better align I/O requests depending on the storage topology. Note that the formats for the config values appear a bit messed up, but we follow the formats used by ATA and SCSI so they are expected in the storage world. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: use smp_XX barriers on SMPMichael S. Tsirkin
virtio is communicating with a virtual "device" that actually runs on another host processor. Thus SMP barriers can be used to control memory access ordering. Where possible, we should use SMP barriers which are more lightweight than mandatory barriers, because mandatory barriers also control MMIO effects on accesses through relaxed memory I/O windows (which virtio does not use) (compare specifically smp_rmb and rmb on x86_64). We can't just use smp_mb and friends though, because we must force memory ordering even if guest is UP since host could be running on another CPU, but SMP barriers are defined to barrier() in that configuration. So, for UP fall back to mandatory barriers instead. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: remove bogus barriers from DEBUG version of virtio_ring.cRusty Russell
With DEBUG defined, we add an ->in_use flag to detect if the caller invokes two virtio methods in parallel. The barriers attempt to ensure timely update of the ->in_use flag. But they're voodoo: if we need these barriers it implies that the calling code doesn't have sufficient synchronization to ensure the code paths aren't invoked at the same time anyway, and we want to detect it. Also, adding barriers changes timing, so turning on debug has more chance of hiding real problems. Thanks to MST for drawing my attention to this code... CC: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24lguest: remove unneeded zlib.h include in example launcherRusty Russell
Two years ago 5bbf89fc2608 removed the horrible bzImage unpacking code. Now it's time to remove the unneeded zlib.h include, too. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: fix balloon without VIRTIO_BALLOON_F_STATS_VQRusty Russell
When running under qemu-kvm-0.11.0: BUG: unable to handle kernel paging request at 56e58955 ... Process vballoon (pid: 1297, ti=c7976000 task=c70a6ca0 task.ti=c7 ... Call Trace: [<c88253a3>] ? balloon+0x1b3/0x440 [virtio_balloon] [<c041c2d7>] ? schedule+0x327/0x9d0 [<c88251f0>] ? balloon+0x0/0x440 [virtio_balloon] [<c014a2d4>] ? kthread+0x74/0x80 [<c014a260>] ? kthread+0x0/0x80 [<c0103b36>] ? kernel_thread_helper+0x6/0x30 need_stats_update should be zero-initialized. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Adam Litke <agl@us.ibm.com>
2010-02-24virtio: Fix scheduling while atomic in virtio_balloon statsAdam Litke
This is a fix for my earlier patch: "virtio: Add memory statistics reporting to the balloon driver (V4)". I discovered that all_vm_events() can sleep and therefore stats collection cannot be done in interrupt context. One solution is to handle the interrupt by noting that stats need to be collected and waking the existing vballoon kthread which will complete the work via stats_handle_request(). Rusty, is this a saner way of doing business? There is one issue that I would like a broader opinion on. In stats_request, I update vb->need_stats_update and then wake up the kthread. The kthread uses vb->need_stats_update as a condition variable. Do I need a memory barrier between the update and wake_up to ensure that my kthread sees the correct value? My testing suggests that it is not needed but I would like some confirmation from the experts. Signed-off-by: Adam Litke <agl@us.ibm.com> To: Rusty Russell <rusty@rustcorp.com.au> Cc: Anthony Liguori <aliguori@linux.vnet.ibm.com> Cc: linux-kernel@vger.kernel.org Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: Add memory statistics reporting to the balloon driver (V4)Adam Litke
Changes since V3: - Do not do endian conversions as they will be done in the host - Report stats that reference a quantity of memory in bytes - Minor coding style updates Changes since V2: - Increase stat field size to 64 bits - Report all sizes in kb (not pages) - Drop anon_pages stat and fix endianness conversion Changes since V1: - Use a virtqueue instead of the device config space When using ballooning to manage overcommitted memory on a host, a system for guests to communicate their memory usage to the host can provide information that will minimize the impact of ballooning on the guests. The current method employs a daemon running in each guest that communicates memory statistics to a host daemon at a specified time interval. The host daemon aggregates this information and inflates and/or deflates balloons according to the level of host memory pressure. This approach is effective but overly complex since a daemon must be installed inside each guest and coordinated to communicate with the host. A simpler approach is to collect memory statistics in the virtio balloon driver and communicate them directly to the hypervisor. This patch enables the guest-side support by adding stats collection and reporting to the virtio balloon driver. Signed-off-by: Adam Litke <agl@us.ibm.com> Cc: Anthony Liguori <anthony@codemonkey.ws> Cc: virtualization@lists.linux-foundation.org Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (minor fixes)
2010-02-24Add __devexit_p around reference to virtio_pci_removeJamie Lokier
This is needed to compile with CONFIG_VIRTIO_PCI=y, because virtio_pci_remove is marked __devexit. Signed-off-by: Jamie Lokier <jamie@shareable.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-22Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linusLinus Torvalds
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: MIPS: BCM47xx: Fix 128MB RAM support MIPS: Highmem: Fix build error
2010-02-22Merge branch 'parisc/tracehook' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-roland * 'parisc/tracehook' of git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-roland: Revert "parisc: HAVE_ARCH_TRACEHOOK"
2010-02-22fs/exec.c: fix initial stack reservationMichael Neuling
803bf5ec259941936262d10ecc84511b76a20921 ("fs/exec.c: restrict initial stack space expansion to rlimit") attempts to limit the initial stack to 20*PAGE_SIZE. Unfortunately, in attempting ensure the stack is not reduced in size, we ended up not changing the stack at all. This size reduction check is not necessary as the expand_stack call does this already. This caused a regression in UML resulting in most guest processes being killed. Signed-off-by: Michael Neuling <mikey@neuling.org> Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: WANG Cong <xiyou.wangcong@gmail.com> Cc: Anton Blanchard <anton@samba.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: James Morris <jmorris@namei.org> Cc: Serge Hallyn <serue@us.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Jouni Malinen <j@w1.fi> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-02-22efifb: fix framebuffer handoffMarcin Slusarz
Commit 4410f3910947dcea8672280b3adecd53cec4e85e ("fbdev: add support for handoff from firmware to hw framebuffers") didn't add fb_destroy operation to efifb. Fix it and change aperture_size to match size passed to request_mem_region. Addresses http://bugzilla.kernel.org/show_bug.cgi?id=15151 Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Reported-by: Alex Zhavnerchik <alex.vizor@gmail.com> Tested-by: Alex Zhavnerchik <alex.vizor@gmail.com> Acked-by: Peter Jones <pjones@redhat.com> Cc: Huang Ying <ying.huang@intel.com> Cc: Dave Airlie <airlied@redhat.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-02-22geode-mfgpt: restore previous behavior for selecting IRQJens Rottmann
geode-mfgpt: restore previous behavior for selecting IRQ The MFGPT IRQ used to be, in order of decreasing priority, * IRQ supplied by the user as a boot-time parameter, * IRQ previously set by the BIOS or another driver, * default IRQ given at compile time. Return to this behavior, which got broken when splitting the MFGPT/clocksource driver for 2.6.33-rc1. Signed-off-by: Jens Rottmann <JRottmann@LiPPERTEmbedded.de> Acked-by: Andres Salomon <dilinger@collabora.co.uk> Cc: Jordan Crouse <jordan.crouse@amd.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: john stultz <johnstul@us.ibm.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-02-22idr: fix a critical misallocation bug, take#2Tejun Heo
This is retry of reverted 859ddf09743a8cc680af33f7259ccd0fd36bfe9d ("idr: fix a critical misallocation bug") which contained two bugs. * pa[idp->layers] should be cleared even if it's not used by sub_alloc() because it's used by mark idr_mark_full(). * The original condition check also assigned pa[l] to p which the new code didn't do thus leaving p pointing at the wrong layer. Both problems have been fixed and the idr code has received good amount testing using userland testing setup where simple bitmap allocator is run parallel to verify the result of idr allocation. The bug this patch fixes is caused by sub_alloc() optimization path bypassing out-of-room condition check and restarting allocation loop with starting value higher than maximum allowed value. For detailed description, please read commit message of 859ddf09. Signed-off-by: Tejun Heo <tj@kernel.org> Based-on-patch-from: Eric Paris <eparis@redhat.com> Reported-by: Eric Paris <eparis@redhat.com> Tested-by: Stefan Lippers-Hollmann <s.l-h@gmx.de> Tested-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-02-22kernel/sys.c: fix missing rcu protection for sys_getpriority()Tetsuo Handa
find_task_by_vpid() is not safe without rcu_read_lock(). 2.6.33-rc7 got RCU protection for sys_setpriority() but missed it for sys_getpriority(). Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Cc: Oleg Nesterov <oleg@redhat.com> Cc: "Paul E. McKenney" <paulmck@us.ibm.com> Acked-by: Serge Hallyn <serue@us.ibm.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-02-22memcg: fix oom killing a child process in an other cgroupKAMEZAWA Hiroyuki
Presently the oom-killer is memcg aware and it finds the worst process from processes under memcg(s) in oom. Then, it kills victim's child first. It may kill a child in another cgroup and may not be any help for recovery. And it will break the assumption users have. This patch fixes it. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Reviewed-by: Minchan Kim <minchan.kim@gmail.com> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Reviewed-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Acked-by: David Rientjes <rientjes@google.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-02-22MIPS: BCM47xx: Fix 128MB RAM supportHauke Mehrtens
Ignoring the last page when ddr size is 128M. Cached accesses to last page is causing the processor to prefetch using address above 128M stepping out of the DDR address space. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Cc: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/981/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-02-22MIPS: Highmem: Fix build errorYoichi Yuasa
arch/mips/mm/highmem.c: In function 'kmap_init': arch/mips/mm/highmem.c:130: error: 'init_mm' undeclared (first use in this function) arch/mips/mm/highmem.c:130: error: (Each undeclared identifier is reported only once arch/mips/mm/highmem.c:130: error: for each function it appears in.) Signed-off-by: Yoichi Yuasa <yuasa@linux-mips.org> Cc: linux-mips <linux-mips@linux-mips.org> Patchwork: http://patchwork.linux-mips.org/patch/980/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-02-22Revert "parisc: HAVE_ARCH_TRACEHOOK"Roland McGrath
This reverts commit 81bf550d9cdfe0325eb1504b06c9f6511b442c1a. HAVE_ARCH_TRACEHOOK requires defining the user_regset interfaces, including task_user_regset_view(). parisc doesn't do that yet, so don't lie about it. Signed-off-by: Roland McGrath <roland@redhat.com>
2010-02-22Merge branch 'perf-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: perf probe: Init struct probe_point and set counter correctly hw-breakpoint: Keep track of dr7 local enable bits hw-breakpoints: Accept breakpoints on NULL address perf_events: Fix FORK events
2010-02-22Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: usbtouchscreen - extend coordinate range for Generaltouch devices Input: polldev can cause crash in case when polling disabled
2010-02-22i915 / PM: Fix hibernate regression caused by suspend/resume splittingRafael J. Wysocki
Commit 84b79f8d2882b0a84330c04839ed4d3cefd2ff77 (drm/i915: Fix crash while aborting hibernation) attempted to fix a regression introduced by commit cbda12d77ea590082edb6d30bd342a67ebc459e0 (drm/i915: implement new pm ops for i915), but it went too far trying to split the freeze/suspend and resume/thaw parts of the code. As a result, it introduced another regression, which only is visible on some systems. Fix the problem by merging i915_drm_suspend() with i915_drm_freeze() and moving some code from i915_resume() into i915_drm_thaw(), so that intel_opregion_free() and intel_opregion_init() are also executed in the freeze and thaw code paths, respectively. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Reported-and-tested-by: Pedro Ribeiro <pedrib@gmail.com> Tested-by: Tino Keitel <tino.keitel@tikei.de> Acked-by: Eric Anholt <eric@anholt.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-02-22perf probe: Init struct probe_point and set counter correctlyMasami Hiramatsu
Clear struct probe_point before using it in show_perf_probe_events(), and set pp->found counter correctly in synthesize_perf_probe_point(). Without this initialization, clear_probe_point() will free random addresses. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> LKML-Reference: <20100218181652.26547.57790.stgit@dhcp-100-2-132.bos.redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-02-21Input: usbtouchscreen - extend coordinate range for Generaltouch devicesRoy Yin
Generaltouch protocol allows for coordinates in [0, 0xffff] range and there are devices reporting coordinates as high as 0x7fff so let's update the driver to reflect that. Signed-off-by: Roy Yin <yhch@generaltouch.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2010-02-21Merge 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: sparc32: Fix struct stat uid/gid types.
2010-02-21sparc32: Fix struct stat uid/gid types.David S. Miller
Commit 085219f79cad89291699bd2bfb21c9fdabafe65f ("sparc32: use proper types in struct stat") Accidently changed the struct stat uid/gid members to uid_t and gid_t, but those get set to __kernel_uid32_t and __kernel_gid32_t respectively. Those are of type 'int' but the structure is meant to have 'short'. So use uid16_t and gid16_t to correct this. Reported-by: Rob Landley <rob@landley.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-02-21Merge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdogLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog: [WATCHDOG] bfin: fix max timeout calculation
2010-02-21[WATCHDOG] bfin: fix max timeout calculationMike Frysinger
Relying on overflow/wrap around isn't exact because if you wrap far enough, you get back to "valid" values. Reported-by: Thorsten Pohlmann <pohlmann@tetronik.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Wim Van Sebroeck <wim@iguana.be> Cc: stable <stable@kernel.org>
2010-02-21mm: Make copy_from_user() in migrate.c statically predictableH. Peter Anvin
x86-32 has had a static test for copy_on_user() overflow for a while. This test currently fails in mm/migrate.c resulting in an allyesconfig/allmodconfig build failure on x86-32: In function ‘copy_from_user’, inlined from ‘do_pages_stat’ at /home/hpa/kernel/git/mm/migrate.c:1012: /home/hpa/kernel/git/arch/x86/include/asm/uaccess_32.h:212: error: call to ‘copy_from_user_overflow’ declared Make the logic more explicit and therefore easier for gcc to understand. v2: rewrite the loop entirely using a more normal structure for a chunked-data loop (Linus Torvalds) Reported-by: Len Brown <lenb@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Reviewed-and-Tested-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Arjan van de Ven <arjan@linux.kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk> Cc: Rik van Riel <riel@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>