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2009-12-11kgdb,x86: do not set kgdb_single_step on x86Jason Wessel
On an SMP system the kgdb_single_step flag has the possibility to indefinitely hang the system in the case. Consider the case where, CPU 1 has the schedule lock and CPU 0 is set to single step, there is no way for CPU 0 to run another task. The easy way to observe the problem is to make 2 cpus busy, and run the kgdb test suite. You will see that it hangs the system very quickly. while [ 1 ] ; do find /proc > /dev/null 2>&1 ; done & while [ 1 ] ; do find /proc > /dev/null 2>&1 ; done & echo V1 > /sys/module/kgdbts/parameters/kgdbts The side effect of this patch is that there is the possibility to miss a breakpoint in the case that a single step operation was executed to step over a breakpoint in common code. The trade off of the missed breakpoint is preferred to hanging the kernel. This can be fixed in the future by using kprobes or another strategy to step over planted breakpoints with out of line execution. CC: Ingo Molnar <mingo@elte.hu> Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2009-12-11kgdb: allow for cpu switch when single steppingJason Wessel
The kgdb core should not assume that a single step operation of a kernel thread will complete on the same CPU. The single step flag is set at the "thread" level and it is possible in a multi cpu system that a kernel thread can get scheduled on another cpu the next time it is run. As a further safety net in case a slave cpu is hung, the debug master cpu will try 100 times before giving up and assuming control of the slave cpus is no longer possible. It is more useful to be able to get some information out of kgdb instead of spinning forever. Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2009-12-11kgdb,i386: Fix corner case access to ss with NMI watch dog exceptionJason Wessel
It is possible for the user_mode_vm(regs) check to return true on the i368 arch for a non master kgdb cpu or when the master kgdb cpu handles the NMI watch dog exception. The solution is simply to select the correct gdb_ss location based on the check to user_mode_vm(regs). CC: Ingo Molnar <mingo@elte.hu> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2009-12-11kgdb: Replace strstr() by strchr() for single-character needlesGeert Uytterhoeven
Some versions of gcc replace calls to strstr() with single-character "needle" string parameters by calls to strchr() behind our back. This causes linking errors if strchr() is defined as an inline function in <asm/string.h> (e.g. on m68k, which BTW doesn't have kgdb support). Prevent this by explicitly calling strchr() instead. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2009-12-11kgdbts: Read buffer overflowRoel Kluin
Prevent write to put_buf[BUFMAX] in kgdb test suite. If put_buf_cnt was BUFMAX - 1 at the earlier test, `\0' is written to put_buf[BUFMAX]. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2009-12-11kgdb: Read buffer overflowJason Wessel
Roel Kluin reported an error found with Parfait. Where we want to ensure that that kgdb_info[-1] never gets accessed. Also check to ensure any negative tid does not exceed the size of the shadow CPU array, else report critical debug context because it is an internal kgdb failure. Reported-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2009-12-11kgdb,x86: remove redundant testRoel Kluin
The for loop starts with a breakno of 0, and ends when it's 4. so this test is always true. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2009-12-11intelhdmi - dont power off HDA linkWu Fengguang
For codecs without EPSS support (G45/IbexPeak), the hotplug event will be lost if the HDA is powered off during the time. After that the pin presence detection verb returns inaccurate info. So always power-on HDA link for !EPSS codecs. KarL offers the fact and Takashi recommends to flag hda_bus. Thanks! Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-12-11perf tools: Allow building for ARMJamie Iles
Add definitions of rmb() and cpu_relax() and include the ARM unistd.h header. The __kuser_memory_barrier helper in the helper page is used to provide the correct memory barrier depending on the CPU type. [ The rmb() will work on v6 and v7, segfault on v5. Dynamic detection to add v5 support will be added later. ] Signed-off-by: Jamie Iles <jamie.iles@picochip.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Mikael Pettersson <mikpe@it.uu.se> LKML-Reference: <1260534009-5394-1-git-send-email-jamie.iles@picochip.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-11ALSA: hrtimer - Fix lock-upTakashi Iwai
The timer stop callback can be called from snd_timer_interrupt(), which is called from the hrtimer callback. Since hrtimer_cancel() waits for the callback completion, this eventually results in a lock-up. This patch fixes the problem by just toggling a flag at stop callback and call hrtimer_cancel() later. Reported-and-tested-by: Wojtek Zabolotny <W.Zabolotny@elka.pw.edu.pl> Cc: <stable@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-12-11Add missing alignment check in arch/score sys_mmap()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-11fix broken aliasing checks for MAP_FIXED on sparc32, mips, arm and shAl Viro
We want addr - (pgoff << PAGE_SHIFT) consistently coloured... Acked-by: Paul Mundt <lethal@linux-sh.org> Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-11Get rid of open-coding in ia64_brk()Al Viro
The comment in there used to be true, but these days do_brk() does the arch-specific check that covers what we open-coded here. So we can use sys_brk() just fine, only need to do force_successful_syscall_return() after it. See commit 3a459756810912d2c2bf188cef566af255936b4d - that's when the checks in do_brk() had been originally added. Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-11sparc_brk() is not needed anymoreAl Viro
the checks it's doing are duplicated in sys_brk() and failing them early makes no sense, AFAICT. Acked-by: David S. Miller <davem@davemloft.net> Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-11switch do_brk() to get_unmapped_area()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-11Take arch_mmap_check() into get_unmapped_area()Al Viro
Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-11fix a struct file leak in do_mmap_pgoff()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-11Unify sys_mmap*Al Viro
New helper - sys_mmap_pgoff(); switch syscalls to using it. Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-11Cut hugetlb case early for 32bit on ia64Al Viro
It won't work anyway (hugetlb addresses there are way beyond 4Gb) and it's easier to stop it here. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-11arch_mmap_check() on mn10300Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-11Kill ancient crap in s390 compat mmapAl Viro
We've had TASK_SIZE set to 1<<31 for 31bit tasks since May 2004. Before that old32_mmap() had to deal with do_mmap_pgoff() giving it an address out of range. It had tried to do that by checking return value and doing do_munmap() (at wrong address, BTW). IOW, that code had been dead for 5.5 years (and bogus - for 8). Kill. Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-11arm: add arch_mmap_check(), get rid of sys_arm_mremap()Al Viro
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-11file ->get_unmapped_area() shouldn't duplicate work of get_unmapped_area()Al Viro
... we should call mm ->get_unmapped_area() instead and let our caller do the final checks. Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-11kill useless checks in sparc mremap variantsAl Viro
Acked-by: David S. Miller <davem@davemloft.net> Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-11fix pgoff in "have to relocate" case of mremap()Al Viro
Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-11fix the arch checks in MREMAP_FIXED caseAl Viro
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-11fix checks for expand-in-place mremapAl Viro
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-11do_mremap() untangling, part 3Al Viro
Take the check for being able to expand vma in place into a separate helper. Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-11do_mremap() untangling, part 2Al Viro
Take the MREMAP_FIXED into a separate helper, simplify the living hell out of conditions in both cases. Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-11untangling do_mremap(), part 1Al Viro
Take locating vma and checks on it to a separate helper (it will be shared between MREMAP_FIXED/non-MREMAP_FIXED cases when we split them in the next patch) Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-11drm/nouveau: Add DRM driver for NVIDIA GPUsBen Skeggs
This adds a drm/kms staging non-API stable driver for GPUs from NVIDIA. This driver is a KMS-based driver and requires a compatible nouveau userspace libdrm and nouveau X.org driver. This driver requires firmware files not available in this kernel tree, interested parties can find them via the nouveau project git archive. This driver is reverse engineered, and is in no way supported by nVidia. Support for nearly the complete range of nvidia hw from nv04->g80 (nv50) is available, and the kms driver should support driving nearly all output types (displayport is under development still) along with supporting suspend/resume. This work is all from the upstream nouveau project found at nouveau.freedesktop.org. The original authors list from nouveau git tree is: Anssi Hannula <anssi.hannula@iki.fi> Ben Skeggs <bskeggs@redhat.com> Francisco Jerez <currojerez@riseup.net> Maarten Maathuis <madman2003@gmail.com> Marcin Kościelnicki <koriakin@0x04.net> Matthew Garrett <mjg@redhat.com> Matt Parnell <mparnell@gmail.com> Patrice Mandin <patmandin@gmail.com> Pekka Paalanen <pq@iki.fi> Xavier Chantry <shiningxc@gmail.com> along with project founder Stephane Marchesin <marchesin@icps.u-strasbg.fr> Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2009-12-11hw-breakpoints: Handle bad modify_user_hw_breakpoint off-case return valueFrederic Weisbecker
While converting modify_user_hw_breakpoint() return value, we forgot to handle the off-case. It's not returning a pointer anymore. This solves the build warning reported by Stephen Rothwell against linux-next. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Prasad <prasad@linux.vnet.ibm.com> LKML-Reference: <1260529122-6260-1-git-send-regression-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Prasad <prasad@linux.vnet.ibm.com>
2009-12-11perf tools: Allow cross compilingJamie Iles
For embedded platforms, we want to be able to build the perf tools on a build machine to run on a different arch. This patch allows $CROSS_COMPILE to set the cross compiler. Additionally, if NO_LIBPERL is set, then don't use perl include paths as they will be for the host arch. Signed-off-by: Jamie Iles <jamie.iles@picochip.com> Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <1260523260-15694-2-git-send-email-jamie.iles@picochip.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-11sparc64: Fix clock event multiplier printf format.David S. Miller
The type got changed to u32, so %lx generated warnings (and thus build failure on sparc64) Stephen Rothwell fixed it like so: - printk("clockevent: mult[%lx] shift[%d]\n", + printk("clockevent: mult[%ux] shift[%d]\n", But that's not a valid transformation, we now get: clockevent: mult[51539607x] shift[32] in the logs. Fix it to use the correct plain "%x" instead. Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-11sparc64: Use clock{source,events}_calc_mult_shift().David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-11Merge branch 'master' of /home/davem/src/GIT/linux-2.6/David S. Miller
2009-12-11sparc64: Use free_bootmem_late() in mdesc_lmb_free().David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-11sparc: Add alignment and emulation fault perf events.David S. Miller
This mirrors commit 196f02bf900c5eb6f85d889c4f70e7cc11fda7e8 (powerpc: perf_event: Add alignment-faults and emulation-faults software events) Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-11sparc64: Add syscall tracepoint support.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-11x86: Use find_e820() instead of hard coded trampoline addressYinghai Lu
Jens found the following crash/regression: [ 0.000000] found SMP MP-table at [ffff8800000fdd80] fdd80 [ 0.000000] Kernel panic - not syncing: Overlapping early reservations 12-f011 MP-table mpc to 0-fff BIOS data page and [ 0.000000] Kernel panic - not syncing: Overlapping early reservations 12-f011 MP-table mpc to 6000-7fff TRAMPOLINE and bisected it to b24c2a9 ("x86: Move find_smp_config() earlier and avoid bootmem usage"). It turns out the BIOS is using the first 64k for mptable, without reserving it. So try to find good range for the real-mode trampoline instead of hard coding it, in case some bios tries to use that range for sth. Reported-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Tested-by: Jens Axboe <jens.axboe@oracle.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> LKML-Reference: <4B21630A.6000308@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-11tracing, slab: Fix no callsite ifndef CONFIG_KMEMTRACELi Zefan
For slab, if CONFIG_KMEMTRACE and CONFIG_DEBUG_SLAB are not set, __do_kmalloc() will not track callers: # ./perf record -f -a -R -e kmem:kmalloc ^C # ./perf trace ... perf-2204 [000] 147.376774: kmalloc: call_site=c0529d2d ... perf-2204 [000] 147.400997: kmalloc: call_site=c0529d2d ... Xorg-1461 [001] 147.405413: kmalloc: call_site=0 ... Xorg-1461 [001] 147.405609: kmalloc: call_site=0 ... konsole-1776 [001] 147.405786: kmalloc: call_site=0 ... Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: linux-mm@kvack.org <linux-mm@kvack.org> Cc: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> LKML-Reference: <4B21F8AE.6020804@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-11tracing, slab: Define kmem_cache_alloc_notrace ifdef CONFIG_TRACINGLi Zefan
Define kmem_trace_alloc_{,node}_notrace() if CONFIG_TRACING is enabled, otherwise perf-kmem will show wrong stats ifndef CONFIG_KMEM_TRACE, because a kmalloc() memory allocation may be traced by both trace_kmalloc() and trace_kmem_cache_alloc(). Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: linux-mm@kvack.org <linux-mm@kvack.org> Cc: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> LKML-Reference: <4B21F89A.7000801@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-10sparc: Stop trying to be so fancy and use __builtin_{memcpy,memset}()David S. Miller
This mirrors commit ff60fab71bb3b4fdbf8caf57ff3739ffd0887396 (x86: Use __builtin_memset and __builtin_memcpy for memset/memcpy) Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-10sparc: Use __builtin_object_size() to validate the buffer size for ↵David S. Miller
copy_from_user() This mirrors x86 commit 9f0cf4adb6aa0bfccf675c938124e68f7f06349d (x86: Use __builtin_object_size() to validate the buffer size for copy_from_user()) Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-11ALSA: intelhdmi - add channel mapping for typical configurationsWu Fengguang
IbexPeak is the first Intel HDMI audio codec to support channel mapping. Currently the outstanding problem is, the HDMI channel order do not agree with that of ALSA. This patch presents workaround for some typical use cases. It gives priority to the typical ALSA surround configurations, and defines channel mapping for them. We may need better kernel+userspace interactive channel mapping scheme. For example, in current scheme if user plays with the surround50 device, the kernel is unaware of this and will still select the surround41 channel allocation and channel mapping.. Thanks to Marcin for offering good tips! Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-12-11ALSA: intelhdmi - channel mapping applies to PinWu Fengguang
HDA036-A specifies that the Audio Sample Packet (ASP) Channel Mapping verbs apply to Digital Display Pin Complex instead of Converter. With this fix, channel mapping is working as expected for IbexPeak. Thanks to Marcin for pointing this out! Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-12-11ALSA: intelhdmi - accept DisplayPort pinWu Fengguang
HDA036 spec states: DP (Display Port) indicates whether the Pin Complex Widget supports connection to a Display Port sink. Supported if set to 1. Note that it is possible for the pin widget to support more than one digital display connection type, e.g. HDMI and DP bit are both set to 1. Also export the DP pin cap in procfs. Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-12-11ALSA: hda - show HBR(High Bit Rate) pin cap in procfsWu Fengguang
Note that the HBR capability only applies to HDMI pin. Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-12-11ALSA: hda - Fix LED GPIO setup for HP laptops with IDT codecsVitaliy Kulikov
This patch fixes an error in processing of the HP BIOS configuration to enable GPIO based mute LED indicator control. That error causes driver to enable such control on all HP systems with the 92HD75 IDT codecs and results in unnecessary toggling of the GPIO on mute control manipulation. It also adds support of the future HP BIOS configuration extension for the named control. New configuration string has a format HP_Mute_LED_P_G where P can be 0 or 1 and defines mute LED GPIO control state (low/high) that corresponds to the NOT muted state of the master volume and G is the index of the GPIO to use (0..9) Lastly, it adds more systems to the support of the audio implementation as found on HP B-series systems Signed-off-by: Vitaliy Kulikov <Vitaliy.Kulikov@idt.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-12-10Merge branch 'drm-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 * 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (189 commits) drm/radeon/kms: fix warning about cur_placement being uninitialised. drm/ttm: Print debug information on memory manager when eviction fails drm: Add memory manager debug function drm/radeon/kms: restore surface registers on resume. drm/radeon/kms/r600/r700: fallback gracefully on ucode failure drm/ttm: Initialize eviction placement in case the driver callback doesn't drm/radeon/kms: cleanup structure and module if initialization fails drm/radeon/kms: actualy set the eviction placements we choose drm/radeon/kms: Fix NULL ptr dereference drm/radeon/kms/avivo: add support for new pll selection algo drm/radeon/kms/avivo: fix some bugs in the display bandwidth setup drm/radeon/kms: fix return value from fence function. drm/radeon: Remove tests for -ERESTART from the TTM code. drm/ttm: Have the TTM code return -ERESTARTSYS instead of -ERESTART. drm/radeon/kms: Convert radeon to new TTM validation API (V2) drm/ttm: Rework validation & memory space allocation (V3) drm: Add search/get functions to get a block in a specific range drm/radeon/kms: fix avivo tiling regression since radeon object rework drm/i915: Remove a debugging printk from hangcheck drm/radeon/kms: make sure i2c id matches ...
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