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* [I2C] i2c-mv64xxx: Don't set i2c_adapter.retriesJean Delvare2008-01-26
| | | | | | | | | | | I2C adapter drivers are supposed to handle retries on nack by themselves if they do, so there's no point in setting .retries if they don't. As this retry mechanism is going away (at least in its current form), clean this up now so that we don't get build failures later. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Mark A. Greer <mgreer@mvista.com>
* cpu-hotplug: replace lock_cpu_hotplug() with get_online_cpus()Gautham R Shenoy2008-01-25
| | | | | | | | | | | | | | | | | Replace all lock_cpu_hotplug/unlock_cpu_hotplug from the kernel and use get_online_cpus and put_online_cpus instead as it highlights the refcount semantics in these operations. The new API guarantees protection against the cpu-hotplug operation, but it doesn't guarantee serialized access to any of the local data structures. Hence the changes needs to be reviewed. In case of pseries_add_processor/pseries_remove_processor, use cpu_maps_update_begin()/cpu_maps_update_done() as we're modifying the cpu_present_map there. Signed-off-by: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Driver core: change sysdev classes to use dynamic kobject namesKay Sievers2008-01-24
| | | | | | | | | | All kobjects require a dynamically allocated name now. We no longer need to keep track if the name is statically assigned, we can just unconditionally free() all kobject names on cleanup. Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* driver core: make /sys/power a kobjectGreg Kroah-Hartman2008-01-24
| | | | | | | | | /sys/power should not be a kset, that's overkill. This patch renames it to power_kset and fixes up all usages of it in the tree. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* kobject: convert pseries/power.c to kobj_attr interfaceGreg Kroah-Hartman2008-01-24
| | | | | | | | | | This makes the code a bit simpler and and gets us one step closer to deleting the deprecated subsys_attr code. Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Manish Ahuja <mahuja@us.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* kset: convert /sys/power to use kset_createGreg Kroah-Hartman2008-01-24
| | | | | | | | | | | | | | Dynamically create the kset instead of declaring it statically. We also rename power_subsys to power_kset to catch all users of the variable and we properly export it so that people don't have to guess that it really is present in the system. The pseries code is wierd, why is it createing /sys/power if CONFIG_PM is disabled? Oh well, stupid big boxes ignoring config options... Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* kobject: remove struct kobj_type from struct ksetGreg Kroah-Hartman2008-01-24
| | | | | | | | | | | | | | | | | We don't need a "default" ktype for a kset. We should set this explicitly every time for each kset. This change is needed so that we can make ksets dynamic, and cleans up one of the odd, undocumented assumption that the kset/kobject/ktype model has. This patch is based on a lot of help from Kay Sievers. Nasty bug in the block code was found by Dave Young <hidave.darkstar@gmail.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Dave Young <hidave.darkstar@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Fix file references in documentation and KconfigJohann Felix Soden2008-01-22
| | | | | | | | | | | | | | Fix typo in arch/powerpc/boot/flatdevtree_env.h. There is no Documentation/networking/ixgbe.txt. README.cycladesZ is now in Documentation/. wavelan.p.h is now in drivers/net/wireless/. HFS.txt is now Documentation/filesystems/hfs.txt. OSS-files are now in sound/oss/. Signed-off-by: Johann Felix Soden <johfel@users.sourceforge.net> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [POWERPC] Fix boot failure on POWER6Paul Mackerras2008-01-15
| | | | | | | | | | | | | | | | Commit 473980a99316c0e788bca50996375a2815124ce1 added a call to clear the SLB shadow buffer before registering it. Unfortunately this means that we clear out the entries that slb_initialize has previously set in there. On POWER6, the hypervisor uses the SLB shadow buffer when doing partition switches, and that means that after the next partition switch, each non-boot CPU has no SLB entries to map the kernel text and data, which causes it to crash. This fixes it by reverting most of 473980a9 and instead clearing the 3rd entry explicitly in slb_initialize. This fixes the problem that 473980a9 was trying to solve, but without breaking POWER6. Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Workaround for iommu page alignmentBenjamin Herrenschmidt2008-01-14
| | | | | | | | | | | | | | | | | | Commit 5d2efba64b231a1733c4048d1708d77e07f26426 changed our iommu code so that it always uses an iommu page size of 4kB. That means with our current code, drivers may do a dma_map_sg() of a 64kB page and obtain a dma_addr_t that is only 4k aligned. This works fine in most cases except for some infiniband HW it seems, where they tell the HW about the page size and it ignores the low bits of the DMA address. This works around it by making our IOMMU code enforce a PAGE_SIZE alignment for mappings of objects that are page aligned in the first place and whose size is larger or equal to a page. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Fix CPU hotplug when using the SLB shadow bufferMichael Neuling2008-01-11
| | | | | | | | | | | | | Before we register the SLB shadow buffer, we need to invalidate the entries in the buffer, otherwise we can end up stale entries from when we previously offlined the CPU. This does this invalidate as well as unregistering the buffer with PHYP before we offline the cpu. Tested and fixes crashes seen on 970MP (thanks to tonyb) and POWER5. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] efika: add phy-handle property for fec_mpc52xxOlaf Hering2008-01-10
| | | | | | | | | | | | | | | | The new network driver fec_mpc52xx will not work on efika because the firmware does not provide all required properties. http://www.powerdeveloper.org/asset/by-id/46 has a Forth script to create more properties. But only the phy stuff is required to get a working network. This should go into the kernel because its appearently impossible to boot the script via tftp and then load the real boot binary (yaboot or zimage). Signed-off-by: Olaf Hering <olaf@aepfle.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* [POWERPC] Fix build failure on Cell when CONFIG_SPU_FS=yPaul Mackerras2008-01-01
| | | | | | | | | | | | | Commit aed3a8c9bb1a8623a618232087c5ff62718e3b9a introduced a definition of notify_spus_active in .../cell/spu_syscalls.c, and another definition under #ifndef MODULE in .../cell/spufs/sched.c. The latter is not necessary and causes the build to fail when CONFIG_SPU_FS=y, so this removes it. It also removes the export of do_notify_spus_active, which is unnecessary. Signed-off-by: Paul Mackerras <paulus@samba.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Jeremy Kerr <jk@ozlabs.org>
* [POWERPC] PS3: Fix printing of os-area magic numbersGeoff Levand2007-12-27
| | | | | | | | | | | | Fix a bug in the printing of the os-area magic numbers which assumed that magic numbers were zero terminated strings. The magic numbers are represented in memory as integers. If the os-area sections are not initialized correctly they could contained random data that would be printed to the display. Also unify the handling of header and db magic numbers and make both of type array of u8. Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Oprofile: Remove dependency on spufs moduleBob Nelson2007-12-27
| | | | | | | | | | | | This removes an OProfile dependency on the spufs module. This dependency was causing a problem for multiplatform systems that are built with support for Oprofile on Cell but try to load the oprofile module on a non-Cell system. Signed-off-by: Bob Nelson <rrnelson@us.ibm.com> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Acked-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* Merge branch 'for-2.6.24' of ↵Paul Mackerras2007-12-14
|\ | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc into merge
| * [POWERPC] Fix rounding bug in emulation for double float operatingLiu Yu2007-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes rounding bug in emulation for double float operating on PowerPC platform. When pack double float operand, it need to truncate the tail due to the limited precision. If the truncated part is not zero, the last bit of work bit (totally 3 bits) need to '|' 1. This patch is completed in _FP_FRAC_SRS_2(X,N,sz) (arch/powerpc/math-emu/op-2.h). Originally the code leftwards rotates the operand to just keep the truncated part, then check whether it is zero. However, the number it rotates is not correct when N is not smaller than _FP_W_TYPE_SIZE, and it will cause the work bit '|' 1 in the improper case. This patch fixes this issue. Signed-off-by: Liu Yu <b13201@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| * [POWERPC] 82xx: mpc8272ads, pq2fads: Update defconfig with ↵Scott Wood2007-12-13
| | | | | | | | | | | | | | | | | | CONFIG_FS_ENET_MDIO_FCC This was recently made configurable, and needs to be set for these boards. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| * [POWRPC] CPM2: Eliminate section mismatch warning in cpm2_reset().Scott Wood2007-12-13
| | | | | | | | | | Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| * [POWERPC] Kill non-existent symbols from ksyms and commproc.hJochen Friedrich2007-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove exports of __res and cpm_install_handler/cpm_free_handler. Remove cpm_install_handler/cpm_free_handler from the commproc.h as well. Both were used for ARCH=ppc and aren't defined for ARCH=powerpc. CC arch/powerpc/kernel/ppc_ksyms.o arch/powerpc/kernel/ppc_ksyms.c:180: error: '__res' undeclared here (not in a function) arch/powerpc/kernel/ppc_ksyms.c:180: warning: type defaults to 'int' in declaration of '__res' make[1]: *** [arch/powerpc/kernel/ppc_ksyms.o] Error 1 make: *** [arch/powerpc/kernel] Error 2 LD .tmp_vmlinux1 arch/powerpc/kernel/built-in.o:(__ksymtab+0x198): undefined reference to `cpm_free_handler' arch/powerpc/kernel/built-in.o:(__ksymtab+0x1a0): undefined reference to `cpm_install_handler' make: *** [.tmp_vmlinux1] Error 1 Signed-off-by: Jochen Friedrich <jochen@scram.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Vitaly Bordug <vitb@kernel.crashing.org> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | [POWERPC] Make PS3_SYS_MANAGER default y, not mMichael Ellerman2007-12-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently it's impossible to build a ps3_defconfig which will reboot without modules installed. This makes it all too easy to find yourself with a PS3 that won't reboot. This is because the system manager driver, which provides the reboot mechanism, is only selectable if PS3_ADVANCED is set, else it defaults to m. In ps3_defconfig PS3_ADVANCED is not set, therefore the system manager is built as a module. It would be desirable IMHO for the defconfig to produce a kernel that boots and reboots, without needing modules to be installed. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Acked-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [POWERPC] iSeries: don't printk with HV spinlock heldStephen Rothwell2007-12-13
|/ | | | | | | | | | | | Printk was observed to hang during module unload due to a limited window of characters that may be sent to the hypervisor. The window only reexpands when we receive an ack from the HV and the spinlock here prevents us from ever processing that ack. This fixes it by dropping the lock before doing the printk, then looping back to the top to reacquire the lock. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* powerpc: Fix IDE legacy vs. native fixupsBenjamin Herrenschmidt2007-12-10
| | | | | | | | | | | | | | | | PowerMac and CHRP/BriQ platforms have quirks to switch some IDE controllers from legacy mode to fully native mode. Those quirks however will not work properly anymore due to a change to the generic code to better handle legacy IDE resources. This fixes it by moving those quirk to "early" quirks (so they run before resources are probed for the devices) and clearing all BARs after the conversion to force a reallocation of sane values. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ibm_newemac: Cleanup/fix support for STACR register variantsBenjamin Herrenschmidt2007-12-07
| | | | | | | | | | There are a few variants of the STACR register that affect more than just the "AXON" version of EMAC. Replace the current test of various chip models with tests for generic properties in the device-tree. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Stefan Roese <sr@denx.de> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* ibm_newemac: Cleanup/Fix RGMII MDIO support detectionBenjamin Herrenschmidt2007-12-07
| | | | | | | | | | More than just "AXON" version of EMAC RGMII supports MDIO, so replace the current test with a generic property in the device-tree that indicates such support. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Stefan Roese <sr@denx.de> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* Merge branch 'merge' of ↵Linus Torvalds2007-12-06
|\ | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/paulus/powerpc * 'merge' of master.kernel.org:/pub/scm/linux/kernel/git/paulus/powerpc: [POWERPC] virtex bug fix: Use canonical value for AC97 interrupt xparams [POWERPC] Update defconfigs [POWERPC] PS3: Update ps3_defconfig [POWERPC] Update iseries_defconfig [POWERPC] Fix hardware IRQ time accounting problem.
| * [POWERPC] Update defconfigsPaul Mackerras2007-12-06
| | | | | | | | | | | | | | | | | | | | | | This updates all the defconfigs in arch/powerpc/configs except iseries and ps3, which were updated by the preceding commits. This mostly takes the defaults, except that I turned on tickless idle and high-resolution timers for everything, and turned off instrumentation support and "Fair group CPU scheduler" for the smaller/embedded platforms. Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] PS3: Update ps3_defconfigGeoff Levand2007-12-06
| | | | | | | | | | | | | | Update ps3_defconfig. Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Update iseries_defconfigStephen Rothwell2007-12-06
| | | | | | | | | | | | | | The notable changes here are the enabling of NO_HZ and HIGH_RES_TIMERS. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Fix hardware IRQ time accounting problem.Tony Breeds2007-12-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The commit fa13a5a1f25f671d084d8884be96fc48d9b68275 (sched: restore deterministic CPU accounting on powerpc), unconditionally calls update_process_tick() in system context. In the deterministic accounting case this is the correct thing to do. However, in the non-deterministic accounting case we need to not do this, since doing this results in the time accounted as hardware irq time being artificially elevated. Also this collapses 2 consecutive '#ifdef CONFIG_VIRT_CPU_ACCOUNTING' checks in time.h into one for neatness. Signed-off-by: Tony Breeds <tony@bakeyournoodle.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [POWERPC] Fix swapper_pg_dir size when CONFIG_PTE_64BIT=y on FSL_BOOKEKumar Gala2007-12-06
|/ | | | | | | | | The size of swapper_pg_dir is 8k instead of 4k when using 64-bit PTEs (CONFIG_PTE_64BIT). This was reported by Cedric Hombourger <chombourger@gmail.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* Revert "[POWERPC] Fix RTAS os-term usage on kernel panic"Paul Mackerras2007-12-02
| | | | | | | | | | | | This reverts commit a2b51812a4dc5db09ab4d4638d4d8ed456e2457e. It turns out that this change caused some machines to fail to come back up when being rebooted, and generated an error in the hypervisor error log on some machines. The platform architecture (PAPR) is a little unclear on exactly when the RTAS ibm,os-term function should be called. Until that is clarified I'm reverting this commit. Signed-off-by: Paul Mackerras <paulus@samba.org>
* Fix boot problem with iSeries lacking hugepage supportMel Gorman2007-11-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | Ordinarily the size of a pageblock is determined at compile-time based on the hugepage size. On PPC64, the hugepage size is determined at runtime based on what is supported by the machine. With legacy machines such as iSeries that do not support hugepages, HPAGE_SHIFT is 0. This results in pageblock_order being set to -PAGE_SHIFT and a crash results shortly afterwards. This patch adds a function to select a sensible value for pageblock order by default when HUGETLB_PAGE_SIZE_VARIABLE is set. It checks that HPAGE_SHIFT is a sensible value before using the hugepage size; if it is not MAX_ORDER-1 is used. This is a fix for 2.6.24. Credit goes to Stephen Rothwell for identifying the bug and testing candidate patches. Additional credit goes to Andy Whitcroft for spotting a problem with respects to IA-64 before releasing. Additional credit to David Gibson for testing with the libhugetlbfs test suite. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Tested-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [POWERPC] 83xx: Update mpc8349emitx(gp) defconfig for USBGrant Likely2007-11-20
| | | | | | | | | | | USB support for the 8349itx got added a while back; but the defconfig never got updated. This patch adds the appropriate USB config options to the defconfigs Signed-off-by: Grant Likely <grant.likely@secretlab.ca> CC: Scott Wood <scottwood@freescale.com> CC: Timur Tabi <timur@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [POWERPC] 83xx: Update mpc832x_rdb_defconfig to enable MMC-over-SPIAnton Vorontsov2007-11-20
| | | | | Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [POWERPC] 83xx: MPC832x RDB - remove spidev stub, use mmc_spiAnton Vorontsov2007-11-20
| | | | | | | mmc_spi has hit the mainline, so we can start using it. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [POWERPC] 8xxx: MDS board RTC fixesKim Phillips2007-11-20
| | | | | | | | | Now the rtc class ds1374 driver has been added, remove the old rtc driver hookup code, add rtc node to device trees, and turn on the new driver in the defconfigs. Signed-off-by: Kim Phillips <kim.phillips@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [POWERPC] Fix 8xx build breakage due to _tlbie changesBenjamin Herrenschmidt2007-11-20
| | | | | | | | | | | 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>
* Merge branch 'for-2.6.24' of ↵Paul Mackerras2007-11-20
|\ | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc into merge
| * [POWERPC] Fix device tree interrupt map for Freescale ULI1575 boardsKumar Gala2007-11-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| * [POWERPC] 83xx: Handle mpc8360 rev. 2.1 RGMII timing erratumKim Phillips2007-11-19
| | | | | | | | | | | | | | | | 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>
| * [POWERPC] 83xx: Fix 2nd UCC entry in mpc832x_mds.dtsKim Phillips2007-11-19
| | | | | | | | | | | | | | | | | | 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>
| * [POWERPC] 83xx: mpc832x mds: Fix board PHY reset codeKim Phillips2007-11-19
| | | | | | | | | | | | | | | | | | | | | | | | 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>
| * [POWERPC] Fix potential NULL dereferenceCyrill Gorcunov2007-11-19
| | | | | | | | | | | | | | | | 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>
* | [POWERPC] Fix possible division by zero in scaled time accountingMichael Neuling2007-11-20
| | | | | | | | | | | | | | | | | | | | | | 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>
* | [POWERPC] spufs: Fix context destroy vs /spu readdir raceJeremy Kerr2007-11-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* | [POWERPC] Fix RTAS os-term usage on kernel panicLinas Vepstas2007-11-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* | [POWERPC] vdso: Fixes for cache block sizesOlof Johansson2007-11-19
| | | | | | | | | | | | | | | | | | | | | | 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>
* | Merge branch 'for-2.6.24' of ↵Paul Mackerras2007-11-19
|\ \ | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/olof/pasemi into merge
| * | [POWERPC] pasemi: Don't reset mpic at bootOlof Johansson2007-11-19
| |/ | | | | | | | | | | | | 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>
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