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2007-11-20[S390] Dont overwrite lowcores on smp_send_stop().Heiko Carstens
Don't perform a sigp store-status-at-address on smp_send_stop(). It will overwrite the lowcores of other cpus and destroys valueable debug informations. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2007-11-20[S390] Fix kernel preemption.Heiko Carstens
When returning from IRQ handling and TIF_NEED_RESCHED is set we must call preempt_schedule_irq() instead of schedule(). Otherwise the BKL might be unlocked in schedule() and therfore everything that relies on the BKL is broken. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2007-11-20[S390] appldata: remove unused binary sysctls.Heiko Carstens
Remove binary sysctls that never worked due to missing strategy functions. Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Gerald Schaefer <geraldsc@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2007-11-20[S390] cmm: remove unused binary sysctls.Heiko Carstens
Remove binary sysctls that never worked due to missing strategy functions. Cc: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2007-11-20[S390] Fix irq tracing and lockdep_sys_exit calls.Heiko Carstens
Current support for TRACE_IRQFLAGS and lockdep_sys_exit is broken. IRQ flag tracing is broken for program checks. Even worse is that the newly introduced calls to lockdep_sys_exit are in the critical section code which is not supposed to call any C functions. In addition the checks if locks are still held are also done when returning to kernel code which is broken as well. Fix all this by disabling interrupts and machine checks at the exit paths and then do the appropriate checks and calls. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2007-11-20[S390] magic sysrq: check for in_atomic before doing an console_unblankChristian Borntraeger
When doing an magic sysrq reboot on s390 the following bug message appears: SysRq : Resetting BUG: sleeping function called from invalid context at include/asm/semaphore.h:61 in_atomic():1, irqs_disabled():0 07000000004002a8 000000000fe6bc48 0000000000000002 0000000000000000 000000000fe6bce8 000000000fe6bc60 000000000fe6bc60 000000000012a79a 0000000000000000 07000000004002a8 0000000000000006 0000000000000000 0000000000000000 000000000fe6bc48 000000000000000d 000000000fe6bcb8 00000000004000c8 0000000000103234 000000000fe6bc48 000000000fe6bc90 Call Trace: (¬<00000000001031b2>| show_trace+0x12e/0x148) ¬<000000000011ffca>| __might_sleep+0x10a/0x118 ¬<0000000000129fba>| acquire_console_sem+0x92/0xf4 ¬<000000000012a2ca>| console_unblank+0xc2/0xc8 ¬<0000000000107bb4>| machine_restart+0x54/0x6c ¬<000000000028e806>| sysrq_handle_reboot+0x26/0x30 ¬<000000000028e52a>| __handle_sysrq+0xa6/0x180 ¬<0000000000140134>| run_workqueue+0xcc/0x18c ¬<000000000014029a>| worker_thread+0xa6/0x108 ¬<00000000001458e4>| kthread+0x64/0x9c ¬<0000000000106f0e>| kernel_thread_starter+0x6/0xc ¬<0000000000106f08>| kernel_thread_starter+0x0/0xc The only reason for doing a console_unblank on s390 is to flush the log buffer. We have to check for in_atomic before doing a console_unblank as the console is otherwise filled with an unrelated bug message. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2007-11-20[POWERPC] Fix 8xx build breakage due to _tlbie changesBenjamin Herrenschmidt
My changes to _tlbie to fix 4xx unfortunately broke 8xx build in a couple of places. This fixes it. Spotted by Olof Johansson. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Vitaly Bordug <vitb@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-20Merge branch 'for-2.6.24' of ↵Paul Mackerras
master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc into merge
2007-11-20Pull fluff into release branchLen Brown
Conflicts: drivers/acpi/ec.c Signed-off-by: Len Brown <len.brown@intel.com>
2007-11-20Pull thermal into release branchLen Brown
2007-11-20ACPI: fix two IRQ8 issues in IOAPIC modeShaohua Li
Use mp_irqs[] to get PNP device's interrupt polarity and trigger. There are two reasons to do this: 1. BIOS bug for PNP interrupt 2. BIOS explictly does override mp_irqs[] should cover all the cases. http://bugzilla.kernel.org/show_bug.cgi?id=5243 http://bugzilla.kernel.org/show_bug.cgi?id=7679 http://bugzilla.kernel.org/show_bug.cgi?id=9153 [lenb: fixed !IOAPIC and 64-bit !SMP builds] Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2007-11-19[POWERPC] Fix device tree interrupt map for Freescale ULI1575 boardsKumar Gala
The interrupt map for the PCI PHB that had the ULI1575 was not correct on the boards that have it. * 8544 DS: - Fix interrupt mask - Be explicit about use of INTA for on chip peripherals * 8572 DS/8641 HPCN: - Fix interrupt mask - Expand interrupt map for PCI slots to cover all functions - Be explicit about use of INTA for on chip peripherals Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2007-11-20[POWERPC] Fix possible division by zero in scaled time accountingMichael Neuling
If we get no user time and no system time allocated since the last account_system_vtime, the system to user time ratio estimate can end up dividing by zero. This was causing a problem noticed by Balbir Singh. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-20[POWERPC] spufs: Fix context destroy vs /spu readdir raceJeremy Kerr
We can currently cause an oops by repeatedly creating and destroying contexts, while doing getdents() calls on the "/spu" directory. This is due to the context's top-level dentry remaining hashed while the context is being destroyed. Fix this by unhashing the context's dentry with the dentry->d_inode->i_mutex held. This way, we'll hit the check for d_unhashed in dentry_readdir, and won't be included in the list of subdirs for /spu. test: spufs-testsuite:tests/01-spu_create/07-destroy-vs-readdir-race Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-20[POWERPC] Fix RTAS os-term usage on kernel panicLinas Vepstas
The rtas_os_term() routine was being called at the wrong time. The actual rtas call "os-term" will not ever return, and so calling it from the panic notifier is too early. Instead, call it from the machine_reset() call. This splits the rtas_os_term() routine into two: one part to capture the kernel panic message, invoked during the panic notifier, and another part that is invoked during machine_reset(). Prior to this patch, the os-term call was never being made, because panic_timeout was always non-zero. Calling os-term helps keep the hypervisor happy! We have to keep the hypervisor happy to avoid service, dump and error reporting problems. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-19[POWERPC] 83xx: Handle mpc8360 rev. 2.1 RGMII timing erratumKim Phillips
If on a rev. 2.1, adjust UCC clock and data timing characteristics as specified in the rev.2.1 erratum #2. Signed-off-by: Kim Phillips <kim.phillips@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2007-11-19[POWERPC] 83xx: Fix 2nd UCC entry in mpc832x_mds.dtsKim Phillips
correct the reg property, remove duplicate io port entry, whitespace fixes. Thanks to Peter Van Ackeren for pointing this out. Signed-off-by: Kim Phillips <kim.phillips@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2007-11-19[POWERPC] 83xx: mpc832x mds: Fix board PHY reset codeKim Phillips
currently the board-level PHY reset code for the mpc832x MDS messes with reset configuration words source settings which is plain wrong (it looks like this board code was cut-n-pasted from the mpc8360 mds code, which has the PHY reset bits in a different BCSR); this patch points the PHY reset code to the proper mpc832x mds PHY reset bits in the BCSR. Signed-off-by: Peter Van Ackeren <peter.vanackeren@freescale.com> Signed-off-by: Kim Phillips <kim.phillips@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2007-11-19[POWERPC] Fix potential NULL dereferenceCyrill Gorcunov
This patch does fix potential NULL pointer dereference that could take place inside of strcmp() if of_get_property() call failed. Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2007-11-20[POWERPC] vdso: Fixes for cache block sizesOlof Johansson
The current VDSO implementation is hardcoded to 128 byte cache blocks, which are only used on IBM's 64-bit processors. Convert it to get the cache block sizes out of vdso_data instead, similar to how the ppc64 in-kernel cache flush does it. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-20Merge branch 'for-2.6.24' of ↵Paul Mackerras
master.kernel.org:/pub/scm/linux/kernel/git/olof/pasemi into merge
2007-11-19[POWERPC] pasemi: Don't reset mpic at bootOlof Johansson
Due to an erratum, we don't want to reset the mpic at boot time. It can sometimes cause problems with lost interrupts later on while running. Signed-off-by: Olof Johansson <olof@lixom.net>
2007-11-20Merge branch 'for-2.6.24' of ↵Paul Mackerras
master.kernel.org:/pub/scm/linux/kernel/git/jwboyer/powerpc-4xx into merge
2007-11-20[POWERPC] Fix build failure on legacy iSeriesKamalesh Babulal
Include <asm/iseries/hv_call.h> in arch/powerpc/mm/stab.c to fix the following compile error (found with randconfig): CC arch/powerpc/mm/stab.o arch/powerpc/mm/stab.c: In function "stab_initialize": arch/powerpc/mm/stab.c:282: error: implicit declaration of function "HvCall1" arch/powerpc/mm/stab.c:282: error: "HvCallBaseSetASR" undeclared (first use in this function) arch/powerpc/mm/stab.c:282: error: (Each undeclared identifier is reported only once arch/powerpc/mm/stab.c:282: error: for each function it appears in.) make[1]: *** [arch/powerpc/mm/stab.o] Error 1 make: *** [arch/powerpc/mm] Error 2 Signed-off-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> Acked-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-19[POWERPC] 4xx: Use virtual PVR value to init FPU on arch/ppc 440EPJosh Boyer
This fixes arch/ppc 440EP platforms to setup the FPU correctly. A virtual PVR is used, as 440GR platforms share an identical hardware PVR value and do not have an FPU. Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2007-11-19[POWERPC] 4xx: UIC add mask_ack callbackValentine Barshak
This adds uic_mask_ack_irq() callback to PowerPC 4xx uic code to avoid kernel crash. It is used for edge-triggered interrupts by handle_uic_irq(). Signed-off-by: Valentine Barshak <vbarshak@ru.mvista.com> Acked-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2007-11-19[POWERPC] 4xx: balance ioremap/ioumap calls for YuccaRoel Kluin
Call iounmap before returning from an error case. Signed-off-by: Roel Kluin <12o3l@tiscali.nl> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2007-11-19[POWERPC] Xilinx: Register AC97 Controller Reference with the platform busJoachim Foerster
Add AC97 platform bus registration for Xilinx Virtex platforms. Signed-off-by: Joachim Foerster <JOFT@gmx.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2007-11-19[POWERPC] 4xx: Replace #includes of asm/of_platform.h with linux/of_platform.h.Jon Loeliger
Signed-off-by: Jon Loeliger <jdl@freescale.com> Acked-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2007-11-19[POWERPC] prpmc2800: Enable L2 cacheMark A. Greer
Turn on the L2 cache on the prpmc2800 platform. Signed-off-by: Mark A. Greer <mgreer@mvista.com Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-19[POWERPC] pSeries: make pseries_defconfig minus PCI build againStephen Rothwell
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-19[POWERPC] Fix multiple bugs in rtas_ibm_suspend_me codeNathan Lynch
There are several issues with the rtas_ibm_suspend_me code, which enables platform-assisted suspension of an LPAR as covered in PAPR 2.2. 1.) rtas_ibm_suspend_me uses on_each_cpu() to invoke rtas_percpu_suspend_me on all cpus via IPI: if (on_each_cpu(rtas_percpu_suspend_me, &data, 1, 0)) ... 'data' is on the calling task's stack, but rtas_ibm_suspend_me takes no measures to ensure that all instances of rtas_percpu_suspend_me are finished accessing 'data' before returning. This can result in the IPI'd cpus accessing random stack data and getting stuck in H_JOIN. This is addressed by using an atomic count of workers and a completion on the stack. 2.) rtas_percpu_suspend_me is needlessly calling H_JOIN in a loop. The only event that can cause a cpu to return from H_JOIN is an H_PROD from another cpu or a NMI/system reset. Each cpu need call H_JOIN only once per suspend operation. Remove the loop and the now unnecessary 'waiting' state variable. 3.) H_JOIN must be called with MSR[EE] off, but lazy interrupt disabling may cause the caller of rtas_ibm_suspend_me to call H_JOIN with it on; the local_irq_disable() in on_each_cpu() is not sufficient. Fix this by explicitly saving the MSR and clearing the EE bit before calling H_JOIN. 4.) H_PROD is being called with the Linux logical cpu number as the parameter, not the platform interrupt server value. (It's also being called for all possible cpus, which is harmless, but unnecessary.) This is fixed by calling H_PROD for each online cpu using get_hard_smp_processor_id(cpu) for the argument. Signed-off-by: Nathan Lynch <ntl@pobox.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-19sh: lockless UTLB miss fast-path.Paul Mundt
With the refactored update_mmu_cache() introduced in older kernels, there's no longer any need to take the page_table_lock in this path, so simply drop it completely. Without this, performance degradation is seen on SMP on heavily threaded workloads that don't use the split ptlock, and ultimately we have no reason to contend for the lock in the first place. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-19sh: Kill off UTLB flush in fast-path.Paul Mundt
The __do_page_fault() fast-path contains a UTLB flush in order to force an ITLB reload, this isn't needed in practice as the ITLB is auto-reloaded from the UTLB anyways, which is already displaced by the manual 'ldtlb' in the update_mmu_cache() path. This provides a measurable speed up in the TLB miss fast-path. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-18Blackfin arch: cleanup kernel exception message, don't insult the customer.Robin Getz
Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-11-17x86: simplify "make ARCH=x86" and fix kconfig all.configSam Ravnborg
Simplify "make ARCH=x86" and fix kconfig so we again can set 64BIT in all.config. For a fix the diffstat is nice: 6 files changed, 3 insertions(+), 36 deletions(-) The patch reverts these commits: 0f855aa64b3f63d35a891510cf7db932a435c116 -> kconfig: add helper to set config symbol from environment variable 2a113281f5cd2febbab21a93c8943f8d3eece4d3 -> kconfig: use $K64BIT to set 64BIT with all*config targets Roman Zippel pointed out that kconfig supported string compares so the additional complexity introduced by the above two patches were not needed. With this patch we have following behaviour: # make {allno,allyes,allmod,rand}config [ARCH=...] option \ host arch | 32bit | 64bit ===================================================== ./. | 32bit | 64bit ARCH=x86 | 32bit | 32bit ARCH=i386 | 32bit | 32bit ARCH=x86_64 | 64bit | 64bit The general rule are that ARCH= and native architecture takes precedence over the configuration. So make ARCH=i386 [whatever] will always build a 32-bit kernel no matter what the configuration says. The configuration will be updated to 32-bit if it was configured to 64-bit and the other way around. This behaviour is consistent with previous behaviour so no suprises here. make ARCH=x86 will per default result in a 32-bit kernel but as the only ARCH= value x86 allow the user to select between 32-bit and 64-bit using menuconfig. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Andreas Herrmann <aherrman@arcor.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com>
2007-11-18Blackfin arch: fix bug kernel not to boot up with mtd filesystemsBernd Schmidt
Revert this patch: move the init sections to the end of memory, so that after they are free, run time memory is all continugous - this should help decrease memory fragementation. When doing this, we also pack some of the other sections a little closer together, to make sure we don't waste memory. To make this happen, we need to rename the .data.init_task section to .init_task.data, so it doesn't get picked up by the linker script glob. Since it causes the kernel not to boot up with mtd filesystems. Signed-off-by: Bernd Schmidt <bernd.schmidt@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-11-17Blackfin arch: add AXIS AX88180 Gigabit Ethernet Hardware and Driver to ↵Michael Hennerich
board files Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-11-18Blackfin arch: print out modules that are loaded if we get a kernel oopsRobin Getz
Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-11-17Blackfin arch: Add assembly function insl_16Michael Hennerich
/* * CPUs often take a performance hit when accessing unaligned memory * locations. The actual performance hit varies, it can be small if the * hardware handles it or large if we have to take an exception and fix * it * in software. * * Since an ethernet header is 14 bytes network drivers often end up * with * the IP header at an unaligned offset. The IP header can be aligned by * shifting the start of the packet by 2 bytes. Drivers should do this * with: * * skb_reserve(NET_IP_ALIGN); * * The downside to this alignment of the IP header is that the DMA is * now * unaligned. On some architectures the cost of an unaligned DMA is high * and this cost outweighs the gains made by aligning the IP header. * * Since this trade off varies between architectures, we allow * NET_IP_ALIGN * to be overridden. */ This new function insl_16 allows to read form 32-bit IO and writes to 16-bit aligned memory. This is useful in above described scenario - In particular with the AXIS AX88180 Gigabit Ethernet MAC. Once the device is in 32-bit mode, reads from the RX FIFO always decrements 4bytes. While on the other side the destination address in SDRAM is always 16-bit aligned. If we use skb_reserve(0) the receive buffer is 32-bit aligned but later we hit a unaligned exception in the IP code. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-11-23Blackfin arch: use do_div() for the 64bit division as pointed out by BerndMike Frysinger
If you need a 64 bit divide in the kernel, use asm/div64.h. Revert the addition of udivdi3. Cc: Bernd Schmidt <bernd.schmidt@analog.com> Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-11-17x86: reboot fixup for wrap2c boardDenys
Needed to make the wireless board, WRAP2C reboot. Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-11-17x86: check boundary in count setup resourceYinghai Lu
need to check info->res_num less than PCI_BUS_NUM_RESOURCES, so info->bus->resource[info->res_num] = res will not beyond of bus resource array when acpi returns too many resource entries. Signed-off-by: Yinghai Lu <yinghai.lu@sun.com> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: Gary Hade <gary.hade@us.ibm.com> Cc: Len Brown <lenb@kernel.org> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-11-17x86: add hpet sanity checksThomas Gleixner
Some BIOSes advertise HPET at 0x0. We really do no want to allocate a resource there. Check for it and leave early. Other BIOSes tell us the HPET is at 0xfed0000000000000 instead of 0xfed00000. Add a check and fix it up with a warning on user request. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-11-17x86: on x86_64, correct reading of PC RTC when update in progress in time_64.cDavid P. Reed
Correct potentially unstable PC RTC time register reading in time_64.c Stop the use of an incorrect technique for reading the standard PC RTC timer, which is documented to "disconnect" time registers from the bus while updates are in progress. The use of UIP flag while interrupts are disabled to protect a 244 microsecond window is one of the Motorola spec sheet's documented ways to read the RTC time registers reliably. tglx: removed locking changes from original patch, as they gain nothing (read_persistent_clock is only called during boot, suspend, resume - so no hot path affected) and conflict with the paravirt locking scheme (see 32bit code), which we do not want to complicate for no benefit. Signed-off-by: David P. Reed <dpreed@reed.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-11-17x86: fix freeze in x86_64 RTC update code in time_64.cDavid P. Reed
Fix hard freeze on x86_64 when the ntpd service calls update_persistent_clock() A repeatable but randomly timed freeze has been happening in Fedora 6 and 7 for the last year, whenever I run the ntpd service on my AMD64x2 HP Pavilion dv9000z laptop. This freeze is due to the use of spin_lock(&rtc_lock) under the assumption (per a bad comment) that set_rtc_mmss is called only with interrupts disabled. The call from ntp.c to update_persistent_clock is made with interrupts enabled. Signed-off-by: David P. Reed <dpreed@reed.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-11-17x86: fixup cpu_info array conversionThomas Gleixner
92cb7612aee39642d109b8d935ad265e602c0563 sets cpu_info->cpu_index to zero for no reason. Referencing cpu_info->cpu_index now points always to CPU#0, which is apparently not what we want. Remove it. Spotted-by: Zou Nan hai <nanhai.zou@intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-11-17x86: show cpuinfo only for online CPUsAndreas Herrmann
Fix regressions introduced with 92cb7612aee39642d109b8d935ad265e602c0563. It can happen that cpuinfo is displayed for CPUs that are not online or even worse for CPUs not present at all. As an example, following was shown for a "second" CPU of a single core K8 variant: processor : 0 vendor_id : unknown cpu family : 0 model : 0 model name : unknown stepping : 0 cache size : 0 KB fpu : yes fpu_exception : yes cpuid level : 0 wp : yes flags : bogomips : 0.00 clflush size : 0 cache_alignment : 0 address sizes : 0 bits physical, 0 bits virtual power management: Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-11-17x86: fix cpu-hotplug regressionAndreas Herrmann
Commit d435d862baca3e25e5eec236762a43251b1e7ffc ("cpu hotplug: mce: fix cpu hotplug error handling") changed the error handling in mce_cpu_callback. In cases where not all CPUs are brought up during boot (e.g. using maxcpus and additional_cpus parameters) mce_cpu_callback now returns NOTFIY_BAD because for such CPUs cpu_data is not completely filled when the notifier is called. Thus mce_create_device fails right at its beginning: if (!mce_available(&cpu_data[cpu])) return -EIO; As a quick fix I suggest to check boot_cpu_data for MCE. To reproduce this regression: (1) boot with maxcpus=2 addtional_cpus=2 on a 4 CPU x86-64 system (2) # echo 1 >/sys/devices/system/cpu/cpu2/online -bash: echo: write error: Invalid argument dmesg shows: _cpu_up: attempt to bring up CPU 2 failed Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-11-17x86: ignore the sys_getcpu() tcache parameterIngo Molnar
dont use the vgetcpu tcache - it's causing problems with tasks migrating, they'll see the old cache up to a jiffy after the migration, further increasing the costs of the migration. In the worst case they see a complete bogus information from the tcache, when a sys_getcpu() call "invalidated" the cache info by incrementing the jiffies _and_ the cpuid info in the cache and the following vdso_getcpu() call happens after vdso_jiffies have been incremented. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Ulrich Drepper <drepper@redhat.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>