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* [ARM] clean up a load of old declarationsRussell King2008-09-06
| | | | | | ... some of which are now in linux/*.h headers. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] move initrd code from kernel/setup.c to mm/init.cRussell King2008-09-06
| | | | | | | This quietens some sparse warnings about phys_initrd_start and phys_initrd_size. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] sparse: quieten arch/arm/kernel/irq.cRussell King2008-09-06
| | | | Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] remove pc_pointer()Russell King2008-09-06
| | | | | | | pc_pointer() was a function to mask the PC for 26-bit ARMs, which we no longer support. Remove it. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] sparse: fix several warningsRussell King2008-09-05
| | | | | | | | | | | | | | | | | | | | | | | | arch/arm/kernel/process.c:270:6: warning: symbol 'show_fpregs' was not declared. Should it be static? This function isn't used, so can be removed. arch/arm/kernel/setup.c:532:9: warning: symbol 'len' shadows an earlier one arch/arm/kernel/setup.c:524:6: originally declared here A function containing two 'len's. arch/arm/mm/fault-armv.c:188:13: warning: symbol 'check_writebuffer_bugs' was not declared. Should it be static? arch/arm/mm/mmap.c:122:5: warning: symbol 'valid_phys_addr_range' was not declared. Should it be static? arch/arm/mm/mmap.c:137:5: warning: symbol 'valid_mmap_phys_addr_range' was not declared. Should it be static? Missing includes. arch/arm/kernel/traps.c:71:77: warning: Using plain integer as NULL pointer arch/arm/mm/ioremap.c:355:46: error: incompatible types in comparison expression (different address spaces) Sillies. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 5231/1: Do not save the frame pointer in the csum_partial_copy_* functionsCatalin Marinas2008-09-01
| | | | | | | | | Since the other assembly functions do not seem to save the frame pointer onto the stack, this patch changes the csum_partial_copy_* functions to behave in the same way. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 5230/1: Replace post-indexed LDRT/STRT in uaccess.hCatalin Marinas2008-09-01
| | | | | | | | | The post-index immediate value is optional if it is 0 and this patch removes it. The reason is to allow such instructions to compile to Thumb-2 where only pre-indexed LDRT/STRT instructions are allowed. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 5232/1: Do not post-index STRT instruction in clear_user.SCatalin Marinas2008-09-01
| | | | | | | | | The last strnebt instruction has a post-index of 1 but the address register is set to 0 in the next instruction, so no need for post-indexing. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 5227/1: Add the ENDPROC declarations to the .S filesCatalin Marinas2008-09-01
| | | | | | | | | This declaration specifies the "function" type and size for various assembly functions, mainly needed for generating the correct branch instructions in Thumb-2. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 5222/1: Allow configuring user:kernel split via KconfigLennert Buytenhek2008-09-01
| | | | | | | | | This patch adds a config option (CONFIG_VMSPLIT_*) to allow choosing between 3:1, 2:2 and 1:3 user:kernel memory splits. Tested-by: Riku Voipio <riku.voipio@iki.fi> Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 5221/1: fix ldm/stm emulation for kprobesNicolas Pitre2008-09-01
| | | | | | | Logic for the p bit was reversed. Signed-off-by: Nicolas Pitre <nico@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 5211/2: fix a couple warnings from BUG() usageNicolas Pitre2008-09-01
| | | | | | | | | | | | | | | | | | When CONFIG_DEBUG_BUGVERBOSE is not set, we get warnings such as: arch/arm/mm/ioremap.c: In function ‘remap_area_pte’: arch/arm/mm/ioremap.c:67: warning: control reaches end of non-void function mm/bootmem.c: In function ‘mark_bootmem’: mm/bootmem.c:321: warning: control reaches end of non-void function fs/dcache.c: In function ‘d_materialise_unique’: fs/dcache.c:1875: warning: control reaches end of non-void function fs/nfs/client.c: In function ‘nfs_sockaddr_match_ipaddr’: fs/nfs/client.c:251: warning: control reaches end of non-void function block/cfq-iosched.c: In function ‘cfq_async_queue_prio’: block/cfq-iosched.c:1501: warning: control reaches end of non-void function Signed-off-by: Nicolas Pitre <nico@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 5218/1: arm: improved futex supportMikael Pettersson2008-09-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Linux/ARM currently doesn't support robust or PI futexes. The problem is that the kernel wants to perform certain ops (cmpxchg, set, add, or, andn, xor) atomically on user-space addresses, and ARM's futex.h doesn't support that. This patch adds that support, but only for uniprocessor machines. For UP it's enough to disable preemption to ensure mutual exclusion with other software agents (futexes don't need to care about other hardware agents, fortunately). This patch is based on one posted by Khem Raj on 2007-08-01 <http://marc.info/?l=linux-arm-kernel&m=118599407413016&w=2>. (That patch is included in the -RT kernel patches.) My changes since that version include: * corrected implementation of FUTEX_OP_ANDN (must complement oparg) * added missing memory clobber to futex_atomic_cmpxchg_inatomic() * removed spinlock because it's unnecessary for UP and insufficient for SMP, instead the code is restricted to UP and relies on the fact that pagefault_disable() also disables preemption * coding style cleanups Tested on ARMv5 XScales with the glibc-2.6 nptl test suite. Tested-by: Bruce Ashfield <bruce.ashfield@windriver.com> Signed-off-by: Mikael Pettersson <mikpe@it.uu.se> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 5206/1: remove kprobe_trap_handler() hackNicolas Pitre2008-09-01
| | | | | | | | | As mentioned in commit 796969104cab0d454dbc792ad0d12a4f365a8564, and because of commit b03a5b7559563dafdbe52f8b5d8e453a914db941, the direct calling of kprobe_trap_handler() can be removed. Signed-off-by: Nicolas Pitre <nico@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] Update arch/arm/Kconfig for drivers/Kconfig changes, add cpuidleRussell King2008-09-01
| | | | Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 5195/1: ARMv7 Oprofile supportJean PIHET2008-09-01
| | | | | | | | Add Oprofile kernel support for ARMv7. Tested on OMAP3430 and OMAP3530 chipsets (Cortex-A8). Signed-off-by: Jean Pihet <jpihet@mvista.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] cachetype: move definitions to separate headerRussell King2008-09-01
| | | | | | | | Rather than pollute asm/cacheflush.h with the cache type definitions, move them to asm/cachetype.h, and include this new header where necessary. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] cputype: separate definitions, use themRussell King2008-09-01
| | | | | | | | Add asm/cputype.h, moving functions and definitions from asm/system.h there. Convert all users of 'processor_id' to the more efficient read_cpuid_id() function. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds2008-08-25
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: bnx2x: Version update bnx2x: Multi Queue bnx2x: NAPI and interrupts enable/disable bnx2x: NIC load failure cleanup bnx2x: Initialization structure bnx2x: HW lock timeout bnx2x: Minimize lock time bnx2x: Fan failure mechanism on additional design bnx2x: Rx work check ipv6: sysctl fixes ipv4: sysctl fixes sctp: add verification checks to SCTP_AUTH_KEY option
| * bnx2x: Version updateEilon Greenstein2008-08-25
| | | | | | | | | | | | | | Version update Signed-off-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * bnx2x: Multi QueueYitchak Gertner2008-08-25
| | | | | | | | | | | | | | | | | | | | The multi queue support is still disabled by default for the bnx2x (needs some more testing and validation), but there are 2 obvious bug in it which are fixed in this patch Signed-off-by: Yitchak Gertner <gertner@broadcom.com> Signed-off-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * bnx2x: NAPI and interrupts enable/disableYitchak Gertner2008-08-25
| | | | | | | | | | | | | | | | Fixing the order of enabling and disabling NAPI and the interrupts Signed-off-by: Yitchak Gertner <gertner@broadcom.com> Signed-off-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * bnx2x: NIC load failure cleanupYitchak Gertner2008-08-25
| | | | | | | | | | | | | | | | Load failures were not handled correctly Signed-off-by: Yitchak Gertner <gertner@broadcom.com> Signed-off-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * bnx2x: Initialization structureYitchak Gertner2008-08-25
| | | | | | | | | | | | | | | | | | The TPA initialization is part of the FW internal memory initialization and so it is moved to the appropriate function Signed-off-by: Yitchak Gertner <gertner@broadcom.com> Signed-off-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * bnx2x: HW lock timeoutEilon Greenstein2008-08-25
| | | | | | | | | | | | | | | | Increasing the lock timeout to 5 seconds instead of 1 second to minimize the chance of failures due to timeout Signed-off-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * bnx2x: Minimize lock timeEilon Greenstein2008-08-25
| | | | | | | | | | | | | | | | | | After iSCSI boot, the HW lock should only protect the flag so only the first function will reset the chip and not then entire chip reset process Signed-off-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * bnx2x: Fan failure mechanism on additional designEilon Greenstein2008-08-25
| | | | | | | | | | | | | | | | The A1021G board is also using the fan failure mechanism in the same way the A1022G board does Signed-off-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * bnx2x: Rx work checkEilon Greenstein2008-08-25
| | | | | | | | | | | | | | | | | | | | | | | | The has Rx work check was wrong: when the FW was at the end of the page, the driver was already at the beginning of the next page. Since the check only validated that both driver and FW are pointing to the same place, it concluded that there is still work to be done. This caused some serious issues including long latency results on ping-pong test and lockups while unloading the driver in that condition. Signed-off-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * ipv6: sysctl fixesAl Viro2008-08-25
| | | | | | | | | | | | | | | | Braino: net.ipv6 in ipv6 skeleton has no business in rotable class Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
| * ipv4: sysctl fixesAl Viro2008-08-25
| | | | | | | | | | | | | | net.ipv4.neigh should be a part of skeleton to avoid ordering problems Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
| * sctp: add verification checks to SCTP_AUTH_KEY optionVlad Yasevich2008-08-25
| | | | | | | | | | | | | | | | | | The structure used for SCTP_AUTH_KEY option contains a length that needs to be verfied to prevent buffer overflow conditions. Spoted by Eugene Teo <eteo@redhat.com>. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ALSA: fix for CA0106 on MSI K8N Diamond PLUS MotherboardStephen Rothwell2008-08-25
| | | | | | | | | | Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | [x86] Clean up MAXSMP Kconfig, and limit NR_CPUS to 512Linus Torvalds2008-08-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes a regression that was indirectly caused by commit 1184dc2ffe2c8fb9afb766d870850f2c3165ef25 ("x86: modify Kconfig to allow up to 4096 cpus"). Allowing 4k CPU's is not practical at this time, because we still have a number of places that have several 'cpumask_t's on the stack, and a 4k-bit cpumask is 512 bytes of stack-space for each such variable. This literally caused functions like 'smp_call_function_mask' to have a 2.5kB stack frame, and several functions to have 2kB stackframes. With an 8kB stack total, smashing the stack was simply much too likely. At least bugzilla entry http://bugzilla.kernel.org/show_bug.cgi?id=11342 was due to this. The earlier commit to not inline load_module() into sys_init_module() fixed the particular symptoms of this that Alan Brunelle saw in that bugzilla entry, but the huge stack waste by cpumask_t's was the more direct cause. Some day we'll have allocation helpers that allocate large CPU masks dynamically, but in the meantime we simply cannot allow cpumasks this large. Cc: Alan D. Brunelle <Alan.Brunelle@hp.com> Cc: Mike Travis <travis@sgi.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Merge branch 'timers-fixes-for-linus' of ↵Linus Torvalds2008-08-25
|\ \ | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: rtc: fix deadlock
| * | rtc: fix deadlockIngo Molnar2008-08-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | if get_rtc_time() is _ever_ called with IRQs off, we deadlock badly in it, waiting for jiffies to increment. So make the code more robust by doing an explicit mdelay(20). This solves a very hard to reproduce/debug hard lockup reported by Mikael Pettersson. Reported-by: Mikael Pettersson <mikpe@it.uu.se> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds2008-08-25
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: add X86_FEATURE_XMM4_2 definitions x86: fix cpufreq + sched_clock() regression x86: fix HPET regression in 2.6.26 versus 2.6.25, check hpet against BAR, v3 x86: do not enable TSC notifier if we don't need it x86 MCE: Fix CPU hotplug problem with multiple multicore AMD CPUs x86: fix: make PCI ECS for AMD CPUs hotplug capable x86: fix: do not run code in amd_bus.c on non-AMD CPUs
| * | | x86: add X86_FEATURE_XMM4_2 definitionsAustin Zhang2008-08-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Added Intel processor SSE4.2 feature flag. No in-tree user at the moment, but makes the tree-merging life easier for the crypto tree. Signed-off-by: Austin Zhang <austin.zhang@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | x86: fix cpufreq + sched_clock() regressionPeter Zijlstra2008-08-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I noticed that my sched_clock() was slow on a number of machine, so I started looking at cpufreq. The below seems to fix the problem for me. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | Merge branch 'linus' into x86/urgentIngo Molnar2008-08-25
| |\ \ \
| * | | | x86: fix HPET regression in 2.6.26 versus 2.6.25, check hpet against BAR, v3Yinghai Lu2008-08-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | David Witbrodt tracked down (and bisected) a hpet bootup hang on his system to the following problem: a BIOS bug made the hpet device visible as a generic PCI device. If e820 reserved entries happen to be registered first in the resource tree [which v2.6.26 started doing], then the PCI code will reallocate that device's BAR to some other address - breaking timer IRQs and hanging the system. ( Normally hpet devices are hidden by the BIOS from the OS's PCI discovery via chipset magic. Sometimes the hpet is not a PCI device at all. ) Solve this fundamental fragility by making non-PCI platform drivers insert resources into the resource tree even if it overlaps the e820 reserved entry, to keep the resource manager from updating the BAR. Also do these checks for the ioapic and mmconfig addresses, and emit a warning if this happens. Bisected-by: David Witbrodt <dawitbro@sbcglobal.net> Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Tested-by: David Witbrodt <dawitbro@sbcglobal.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | x86: do not enable TSC notifier if we don't need itLinus Torvalds2008-08-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: crash on non-TSC-equipped CPUs Don't enable the TSC notifier if we *either*: 1. don't have a CPU, or 2. have a CPU with constant TSC. In either of those cases, the notifier is either damaging (1) or useless(2). From: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * | | | x86 MCE: Fix CPU hotplug problem with multiple multicore AMD CPUsRafael J. Wysocki2008-08-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | During CPU hot-remove the sysfs directory created by threshold_create_bank(), defined in arch/x86/kernel/cpu/mcheck/mce_amd_64.c, has to be removed before its parent directory, created by mce_create_device(), defined in arch/x86/kernel/cpu/mcheck/mce_64.c . Moreover, when the CPU in question is hotplugged again, obviously the latter has to be created before the former. At present, the right ordering is not enforced, because all of these operations are carried out by CPU hotplug notifiers which are not appropriately ordered with respect to each other. This leads to serious problems on systems with two or more multicore AMD CPUs, among other things during suspend and hibernation. Fix the problem by placing threshold bank CPU hotplug callbacks in mce_cpu_callback(), so that they are invoked at the right places, if defined. Additionally, use kobject_del() to remove the sysfs directory associated with the kobject created by kobject_create_and_add() in threshold_create_bank(), to prevent the kernel from crashing during CPU hotplug operations on systems with two or more multicore AMD CPUs. This patch fixes bug #11337. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Andi Kleen <andi@firstfloor.org> Tested-by: Mark Langsdorf <mark.langsdorf@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | x86: fix: make PCI ECS for AMD CPUs hotplug capableRobert Richter2008-08-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Until now, PCI ECS setup was performed at boot time only and for cpus that are enabled then. This patch fixes this and adds cpu hotplug. Tests sequence (check if ECS bit is set when bringing cpu online again): # ( perl -e 'sysseek(STDIN, 0xC001001F, 0)'; hexdump -n 8 -e '2/4 "%08x " "\n"' ) < /dev/cpu/1/msr 00000008 00404010 # ( perl -e 'sysseek(STDOUT, 0xC001001F, 0); print pack "l*", 8, 0x00400010' ) > /dev/cpu/1/msr # ( perl -e 'sysseek(STDIN, 0xC001001F, 0)'; hexdump -n 8 -e '2/4 "%08x " "\n"' ) < /dev/cpu/1/msr 00000008 00400010 # echo 0 > /sys/devices/system/cpu/cpu1/online # echo 1 > /sys/devices/system/cpu/cpu1/online # ( perl -e 'sysseek(STDIN, 0xC001001F, 0)'; hexdump -n 8 -e '2/4 "%08x " "\n"' ) < /dev/cpu/1/msr 00000008 00404010 Reported-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Robert Richter <robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | x86: fix: do not run code in amd_bus.c on non-AMD CPUsRobert Richter2008-08-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Jan Beulich wrote: > Even worse - this would even try to access the MSR on non-AMD CPUs > (currently probably prevented just by the fact that only AMD ones use > family values of 0x10 or higher). This patch adds cpu vendor check to the postcore_initcalls. Reported-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Robert Richter <robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | | Merge branch 'sched-fixes-for-linus' of ↵Linus Torvalds2008-08-25
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: sched_clock: fix cpu_clock()
| * | | | | sched_clock: fix cpu_clock()Peter Zijlstra2008-08-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes 3 issues: a) it removes the dependency on jiffies, because jiffies are incremented by a single CPU, and the tick is not synchronized between CPUs. Therefore relying on it to calculate a window to clip whacky TSC values doesn't work as it can drift around. So instead use [GTOD, GTOD+TICK_NSEC) as the window. b) __update_sched_clock() did (roughly speaking): delta = sched_clock() - scd->tick_raw; clock += delta; Which gives exponential growth, instead of linear. c) allows the sched_clock_cpu() value to warp the u64 without breaking. the results are more reliable sched_clock() deltas: before after sched_clock cpu_clock: 15750 51312 51488 cpu_clock: 59719 51052 50947 cpu_clock: 15879 51249 51061 cpu_clock: 1 50933 51198 cpu_clock: 1 50931 51039 cpu_clock: 1 51093 50981 cpu_clock: 1 51043 51040 cpu_clock: 1 50959 50938 cpu_clock: 1 50981 51011 cpu_clock: 1 51364 51212 cpu_clock: 1 51219 51273 cpu_clock: 1 51389 51048 cpu_clock: 1 51285 51611 cpu_clock: 1 50964 51137 cpu_clock: 1 50973 50968 cpu_clock: 1 50967 50972 cpu_clock: 1 58910 58485 cpu_clock: 1 51082 51025 cpu_clock: 1 50957 50958 cpu_clock: 1 50958 50957 cpu_clock: 1006128 51128 50971 cpu_clock: 1 51107 51155 cpu_clock: 1 51371 51081 cpu_clock: 1 51104 51365 cpu_clock: 1 51363 51309 cpu_clock: 1 51107 51160 cpu_clock: 1 51139 51100 cpu_clock: 1 51216 51136 cpu_clock: 1 51207 51215 cpu_clock: 1 51087 51263 cpu_clock: 1 51249 51177 cpu_clock: 1 51519 51412 cpu_clock: 1 51416 51255 cpu_clock: 1 51591 51594 cpu_clock: 1 50966 51374 cpu_clock: 1 50966 50966 cpu_clock: 1 51291 50948 cpu_clock: 1 50973 50867 cpu_clock: 1 50970 50970 cpu_clock: 998306 50970 50971 cpu_clock: 1 50971 50970 cpu_clock: 1 50970 50970 cpu_clock: 1 50971 50971 cpu_clock: 1 50970 50970 cpu_clock: 1 51351 50970 cpu_clock: 1 50970 51352 cpu_clock: 1 50971 50970 cpu_clock: 1 50970 50970 cpu_clock: 1 51321 50971 cpu_clock: 1 50974 51324 Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | | | Merge branch 'for-linus' of ↵Linus Torvalds2008-08-25
|\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: PCI: fix reference leak in pci_get_dev_by_id() PCI: shpchp: Rename duplicate slot name N as N-1, N-2, N-M... PCI: pciehp: Rename duplicate slot name N as N-1, N-2, N-M...
| * | | | | | PCI: fix reference leak in pci_get_dev_by_id()Greg KH2008-08-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Alex Chiang and Matthew Wilcox pointed out that pci_get_dev_by_id() does not properly decrement the reference on the from pointer if it is present, like the documentation for the function states it will. It fixes a pretty bad leak in the hotplug core (we were leaking an entire struct pci_dev for each function of each offlined card, the first time around; subsequent onlines/offlines were ok). Cc: Matthew Wilcox <matthew@wil.cx> Cc: stable <stable@kernel.org> Tested-by: Alex Chiang <achiang@hp.com> Acked-by: Alex Chiang <achiang@hp.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * | | | | | PCI: shpchp: Rename duplicate slot name N as N-1, N-2, N-M...Alex Chiang2008-08-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit ef0ff95f136f0f2d035667af5d18b824609de320 (shpchp: fix slot name) introduces the shpchp_slot_with_bus module parameter, which was intended to help work around broken firmware that assigns the same name to multiple slots. Commit b3bd307c628af2f0a581c42d5d7e4bcdbbf64b6a (shpchp: add message about shpchp_slot_with_bus option) tells the user to use the above parameter in the event of a name collision. This approach is sub-optimal because it requires too much work from the user. Instead, let's rename the slot on behalf of the user. If firmware assigns the name N to multiple slots, then: The first registered slot is assigned N The second registered slot is assigned N-1 The third registered slot is assigned N-2 The Mth registered slot becomes N-M In the event we overflow the slot->name parameter, we report an error to the user. This is a temporary fix until the entire PCI core can be reworked such that individual drivers no longer have to manage their own slot names. Tested-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Acked-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * | | | | | PCI: pciehp: Rename duplicate slot name N as N-1, N-2, N-M...Alex Chiang2008-08-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 3800345f723fd130d50434d4717b99d4a9f383c8 (pciehp: fix slot name) introduces the pciehp_slot_with_bus module parameter, which was intended to help work around broken firmware that assigns the same name to multiple slots. Commit 9e4f2e8d4ddb04ad16a3828cd9a369a5a5287009 (pciehp: add message about pciehp_slot_with_bus option) tells the user to use the above parameter in the event of a name collision. This approach is sub-optimal because it requires too much work from the user. Instead, let's rename the slot on behalf of the user. If firmware assigns the name N to multiple slots, then: The first registered slot is assigned N The second registered slot is assigned N-1 The third registered slot is assigned N-2 The Mth registered slot becomes N-M In the event we overflow the slot->name parameter, we report an error to the user. This is a temporary fix until the entire PCI core can be reworked such that individual drivers no longer have to manage their own slot names. Tested-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Acked-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-21 08:15:42 -0500