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| * | [NET]: Remove redundant NULL checks before [kv]freeJesper Juhl2006-04-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | Redundant NULL check before kfree removal from net/ Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Acked-by: James Morris <jmorris@namei.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | unaligned access in sk_run_filter()Dmitry Mishin2006-04-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes unaligned access warnings noticed on IA64 in sk_run_filter(). 'ptr' can be unaligned. Signed-off-By: Dmitry Mishin <dim@openvz.org> Signed-off-By: Kirill Korotaev <dev@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | [IPV6]: Clean up hop-by-hop options handler.YOSHIFUJI Hideaki2006-04-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Removed unused argument (nhoff) for ipv6_parse_hopopts(). - Make ipv6_parse_hopopts() to align with other extension header handlers. - Removed pointless assignment (hdr), which is not used afterwards. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | [IPV6] XFRM: Fix decoding session with preceding extension header(s).YOSHIFUJI Hideaki2006-04-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We did not correctly decode session with preceding extension header(s). This was because we had already pulled preceding headers, skb->nh.raw + 40 + 1 - skb->data was minus, and pskb_may_pull() failed. We now have IP6CB(skb)->nhoff and skb->h.raw, and we can start parsing / decoding upper layer protocol from current position. Tracked down by Noriaki TAKAMIYA <takamiya@po.ntts.co.jp> and tested by Kazunori Miyazawa <kazunori@miyazawa.org>. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | [IPV6] XFRM: Don't use old copy of pointer after pskb_may_pull().YOSHIFUJI Hideaki2006-04-18
| | | | | | | | | | | | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | [IPV6]: Ensure to have hop-by-hop options in our header of &sk_buff.YOSHIFUJI Hideaki2006-04-18
| | | | | | | | | | | | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | [TCP]: Fix truesize underflowHerbert Xu2006-04-18
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is a problem with the TSO packet trimming code. The cause of this lies in the tcp_fragment() function. When we allocate a fragment for a completely non-linear packet the truesize is calculated for a payload length of zero. This means that truesize could in fact be less than the real payload length. When that happens the TSO packet trimming can cause truesize to become negative. This in turn can cause sk_forward_alloc to be -n * PAGE_SIZE which would trigger the warning. I've copied the code DaveM used in tso_fragment which should work here. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* | Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds2006-04-18
|\ \ | | | | | | | | | | | | * master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6: [SPARC64]: Fix dependencies of HUGETLB_PAGE_SIZE_64K
| * | [SPARC64]: Fix dependencies of HUGETLB_PAGE_SIZE_64KJean-Luc Léger2006-04-18
| |/ | | | | | | | | | | | | This patch fixes dependencies of HUGETLB_PAGE_SIZE_64K Signed-off-by: Jean-Luc Léger <jean-luc.leger@dspnet.fr.eu.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreqLinus Torvalds2006-04-18
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq: [CPUFREQ] powernow-k8.c: fix a check-after-use [CPUFREQ] Remove duplicate check in powernow-k8 [CPUFREQ] drivers/cpufreq/cpufreq.c: static functions mustn't be exported [CPUFREQ] If max_freq got reduced (e.g. by _PPC) a write to sysfs scaling_governor let cpufreq core stuck at low max_freq for ever [CPUFREQ] x86_64: Proper null pointer check in powernow_k8_get [CPUFREQ] x86_64: Revert earlier powernow-k8 change [CPUFREQ] Update LART site URL [CPUFREQ] Remove pointless check in conservative governor. [CPUFREQ] trailing whitespace removal de-jour. [CPUFREQ] extra debugging in cpufreq_add_dev()
| * | [CPUFREQ] powernow-k8.c: fix a check-after-useAdrian Bunk2006-04-18
| | | | | | | | | | | | | | | | | | | | | | | | This patch fixes a check-after-use introduced by commit 4211a30349e8d2b724cfb4ce2584604f5e59c299 and spotted by the Coverity checker. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Dave Jones <davej@redhat.com>
| * | [CPUFREQ] Remove duplicate check in powernow-k8Tobias Klauser2006-04-18
| | | | | | | | | | | | | | | | | | | | | | | | Remove a duplicate NULL pointer check introduced by commit 4211a30349e8d2b724cfb4ce2584604f5e59c299 Signed-off-by: Tobias Klauser <tklauser@nuerscht.ch> Signed-off-by: Dave Jones <davej@redhat.com>
| * | [CPUFREQ] drivers/cpufreq/cpufreq.c: static functions mustn't be exportedAdrian Bunk2006-04-18
| | | | | | | | | | | | | | | | | | | | | This patch removes the EXPORT_SYMBOL_GPL of the static function cpufreq_parse_governor(). Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Dave Jones <davej@redhat.com>
| * | [CPUFREQ] If max_freq got reduced (e.g. by _PPC) a write to sysfs ↵Thomas Renninger2006-04-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | scaling_governor let cpufreq core stuck at low max_freq for ever The previous patch had bugs (locking and refcount). This one could also be related to the latest DELL reports. But they only slip into this if a user prog (e.g. powersave daemon does when AC got (un) plugged due to a scheme change) echos something to /sys/../cpufreq/scaling_governor while the frequencies got limited by BIOS. This one works: Subject: Max freq stucks at low freq if reduced by _PPC and sysfs gov access The problem is reproducable by(if machine is limiting freqs via BIOS): - Unplugging AC -> max freq gets limited - echo ${governor} >/sys/.../cpufreq/scaling_governor (policy->user_data.max gets overridden with policy->max and will never come up again.) This patch exchanged the cpufreq_set_policy call to __cpufreq_set_policy and duplicated it's functionality but did not override user_data.max. The same happens with overridding min/max values. If freqs are limited and you override the min freq value, the max freq global value will also get stuck to the limited freq, even if BIOS allows all freqs again. Last scenario does only happen if BIOS does not reduce the frequency to the lowest value (should never happen, just for correctness...) drivers/cpufreq/cpufreq.c | 17 +++++++++++++++-- 1 files changed, 15 insertions(+), 2 deletions(-) Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: "Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com> Signed-off-by: Dave Jones <davej@redhat.com>
| * | Merge ../linusDave Jones2006-04-18
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| * | [CPUFREQ] x86_64: Proper null pointer check in powernow_k8_getjacob.shin@amd.com2006-04-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This prevents crashes on dual core system when enough ticks are lost. Replaces earlier patch by me. (Duplicate null data check in powernowk8_get() removed -- davej) arch/i386/kernel/cpu/cpufreq/powernow-k8.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Dave Jones <davej@redhat.com>
| * | [CPUFREQ] x86_64: Revert earlier powernow-k8 changeAndi Kleen2006-04-10
| | | | | | | | | | | | | | | | | | | | | (Better fix to be applied in next patch) Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Dave Jones <davej@redhat.com>
| * | [CPUFREQ] Update LART site URLErik Mouw2006-04-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Update LART site URL. The LART website moved to http://www.lartmaker.nl/. This patch updates the URL in CpuFreq specific files. Signed-off-by: Erik Mouw <erik@bitwizard.nl> Signed-off-by: Dave Jones <davej@redhat.com>
| * | [CPUFREQ] Remove pointless check in conservative governor.Dave Jones2006-04-01
| | | | | | | | | | | | | | | | | | < 0 checks on unsigned variables are pointless. Signed-off-by: Dave Jones <davej@redhat.com>
| * | [CPUFREQ] trailing whitespace removal de-jour.Dave Jones2006-03-29
| | | | | | | | | | | | Signed-off-by: Dave Jones <davej@redhat.com>
| * | [CPUFREQ] extra debugging in cpufreq_add_dev()Dave Jones2006-03-29
| | | | | | | | | | | | | | | Snipped from an otherwise rejected patch by Jan Beulich <jbeulich@novell.com> Signed-off-by: Dave Jones <davej@redhat.com>
* | | Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds2006-04-18
|\ \ \ | |_|/ |/| | | | | | | | | | | * master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] 3479/1: Corgi SSP: Fix potential concurrent access problem [ARM] 3478/1: SharpSL SCOOP: Fix potenial build failure
| * | [ARM] 3479/1: Corgi SSP: Fix potential concurrent access problemRichard Purdie2006-04-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch from Richard Purdie corgi_ssp_probe() should not access GPDR directly but should use pxa_gpio_mode() which has appropriate locking and other safeguards. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | [ARM] 3478/1: SharpSL SCOOP: Fix potenial build failureRichard Purdie2006-04-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch from Richard Purdie Move platform_scoop_config from the SharpSL scoop PCMCIA driver to the SCOOP driver. This avoids build failures when PCMCIA is not built or is modular (scoop.c itself cannot be modular). Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | | x86: be careful about tailcall breakage for sys_open[at] tooLinus Torvalds2006-04-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Came up through a quick grep for other cases similar to the ftruncate() one in commit 0a489cb3b6a7b277030cdbc97c2c65905db94536. Also, add a comment, so that people who read the code understand why we do what looks like a no-op. (Again, this won't actually matter to any sane user, since libc will save and restore the register gcc stomps on, but it's still wrong to stomp on it) Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | x86: don't allow tail-calls in sys_ftruncate[64]()Linus Torvalds2006-04-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Gcc thinks it owns the incoming argument stack, but that's not true for "asmlinkage" functions, and it corrupts the caller-set-up argument stack when it pushes the third argument onto the stack. Which can result in %ebx getting corrupted in user space. Now, normally nobody sane would ever notice, since libc will save and restore %ebx anyway over the system call, but it's still wrong. I'd much rather have "asmlinkage" tell gcc directly that it doesn't own the stack, but no such attribute exists, so we're stuck with our hacky manual "prevent_tail_call()" macro once more (we've had the same issue before with sys_waitpid() and sys_wait4()). Thanks to Hans-Werner Hilse <hilse@sub.uni-goettingen.de> for reporting the issue and testing the fix. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | Merge branch 'drm-patches' of ↵Linus Torvalds2006-04-18
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 * 'drm-patches' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: drm: Fix further issues in drivers/char/drm/via_irq.c drivers/char/drm/drm_memory.c: possible cleanups drm: deline a few large inlines in DRM code drm: remove master setting from add/remove context drm: drm_pci needs dma-mapping.h [PATCH] drm: Fix issue reported by Coverity in drivers/char/drm/via_irq.c
| * | | drm: Fix further issues in drivers/char/drm/via_irq.cJayachandran C2006-04-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix de-reference of 'dev_priv' before NULL check. Signed-off-by: Jayachandran C. <c.jayachandran@gmail.com> Cc: Dave Airlie <airlied@linux.ie> Signed-off-by: Andrew Morton <akpm@osdl.org>
| * | | drivers/char/drm/drm_memory.c: possible cleanupsAdrian Bunk2006-04-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - #if 0 the following unused global function: - drm_ioremap_nocache() - make the following needlessly global functions static: - agp_remap() - drm_lookup_map() Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Dave Airlie <airlied@linux.ie> Signed-off-by: Andrew Morton <akpm@osdl.org>
| * | | drm: deline a few large inlines in DRM codeDave Airlie2006-04-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch moves a few large functions from drm_memory.h to drm_memory.c, with the following effect: text data bss dec hex filename 46305 1304 20 47629 ba0d new/drm.ko 46367 1304 20 47691 ba4b org/drm.ko 12969 1372 0 14341 3805 new/i810.ko 14712 1372 0 16084 3ed4 org/i810.ko 16447 1364 0 17811 4593 new/i830.ko 18198 1364 0 19562 4c6a org/i830.ko 11875 1324 0 13199 338f new/i915.ko 13025 1324 0 14349 380d org/i915.ko 23936 29288 0 53224 cfe8 new/mga.ko 27280 29288 0 56568 dcf8 org/mga.ko Please apply. Signed-off-by: Denis Vlasenko <vda@ilport.com.ua> Signed-off-by: Dave Airlie <airlied@linux.ie>
| * | | drm: remove master setting from add/remove contextDave Airlie2006-04-05
| | | | | | | | | | | | | | | | | | | | | | | | Clients can do this in the miniglx setups. Signed-off-by: Dave Airlie <airlied@linux.ie>
| * | | drm: drm_pci needs dma-mapping.hDave Airlie2006-04-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On alpha: WARNING: "dma_free_coherent" [drivers/char/drm/drm.ko] undefined! WARNING: "dma_alloc_coherent" [drivers/char/drm/drm.ko] undefined! Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Dave Airlie <airlied@linux.ie>
| * | | [PATCH] drm: Fix issue reported by Coverity in drivers/char/drm/via_irq.cDave Airlie2006-04-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch tries to fix an issue reported in drivers/char/drm/via_irq.c by Coverity, please review and apply if correct. Error reported: CID: 3444 Checker: REVERSE_INULL (help) File: /export2/p4-coverity/mc2/linux26/drivers/char/drm/via_irq.c Function: via_driver_irq_wait Description: Pointer "dev_priv" dereferenced before NULL check Patch Description: Move de-referencing dev_priv to after the NULL check. Signed-off-by: Jayachandran C. <c.jayachandran at gmail.com> Signed-off-by: Dave Airlie <airlied@linux.ie>
* | | | [PATCH] i386: Move CONFIG_DOUBLEFAULT into arch/i386 where it belongs.Andi Kleen2006-04-18
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] x86_64: Add tee and sync_file_rangeAndi Kleen2006-04-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | tee was already there for some reason for native 64bit, but sys_sync_file_range was missing. Also add it to the compat layer. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] x86_64: Increase NUMA hash function nodemapAndi Kleen2006-04-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Needed for some big Opteron systems to compute a numa hash function They have more than 12 bits significant address. TBD switch this over to dynamic allocation or use better hash Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] x86_64: x86_64 add crashdump trigger pointsVivek Goyal2006-04-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | o Start booting into the capture kernel after an Oops if system is in a unrecoverable state. System will boot into the capture kernel, if one is pre-loaded by the user, and capture the kernel core dump. o One of the following conditions should be true to trigger the booting of capture kernel. - panic_on_oops is set. - pid of current thread is 0 - pid of current thread is 1 - Oops happened inside interrupt context. Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] i386/x86-64: Fix ACPI disabled LAPIC handling mismergeAndi Kleen2006-04-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The patch I submitted earlier to fix disabled LAPIC handling in ACPI was mismerged for some reason I still don't quite understand. Parts of it was applied to the wrong function. This patch fixes it up. Cc: len.brown@intel.com Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] x86_64: Update defconfigAndi Kleen2006-04-18
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | Merge branch 'for-linus' of git://brick.kernel.dk/data/git/linux-2.6-blockLinus Torvalds2006-04-18
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://brick.kernel.dk/data/git/linux-2.6-block: [PATCH] cfq: Further rbtree traversal and cfq_exit_queue() race fix [PATCH 2/2] cfq: fix cic's rbtree traversal [PATCH 1/2] iosched: fix typo and barrier()
| * | | | [PATCH] cfq: Further rbtree traversal and cfq_exit_queue() race fixOGAWA Hirofumi2006-04-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In current code, we are re-reading cic->key after dead cic->key check. So, in theory, it may really re-read *after* cfq_exit_queue() seted NULL. To avoid race, we copy it to stack, then use it. With this change, I guess gcc will assign cic->key to a register or stack, and it wouldn't be re-readed. Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Jens Axboe <axboe@suse.de>
| * | | | [PATCH 2/2] cfq: fix cic's rbtree traversalOGAWA Hirofumi2006-04-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When queue dies, we set cic->key=NULL as dead mark. So, when we traverse a rbtree, we must check whether it's still valid key. if it was invalidated, drop it, then restart the traversal from top. Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Jens Axboe <axboe@suse.de>
| * | | | [PATCH 1/2] iosched: fix typo and barrier()OGAWA Hirofumi2006-04-18
| | |/ / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On rmmod path, cfq/as waits to make sure all io-contexts was freed. However, it's using complete(), not wait_for_completion(). I think barrier() is not enough in here. To avoid the following case, this patch replaces barrier() with smb_wmb(). cpu0 visibility cpu1 [ioc_gnone=NULL,ioc_count=1] ioc_gnone = &all_gone NULL,ioc_count=1 atomic_read(&ioc_count) NULL,ioc_count=1 wait_for_completion() NULL,ioc_count=0 atomic_sub_and_test() NULL,ioc_count=0 if ( && ioc_gone) [ioc_gone==NULL, so doesn't call complete()] &all_gone,ioc_count=0 Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Jens Axboe <axboe@suse.de>
* | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc-mergeLinus Torvalds2006-04-18
|\ \ \ \ | |/ / / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc-merge: powerpc: Use correct sequence for putting CPU into nap mode [PATCH] spufs: fix context-switch decrementer code [PATCH] powerpc32: Set cpu explicitly in kernel compiles [PATCH] powerpc/pseries: bugfix: balance calls to pci_device_put [PATCH] powerpc: Fix machine detection in prom_init.c [PATCH] ppc32: Fix string comparing in platform_notify_map [PATCH] powerpc: Avoid __initcall warnings [PATCH] powerpc: Ensure runlatch is off in the idle loop powerpc: Fix CHRP booting - needs a define_machine call powerpc: iSeries has only 256 IRQs
| * | | powerpc: Use correct sequence for putting CPU into nap modePaul Mackerras2006-04-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We weren't using the recommended sequence for putting the CPU into nap mode. When I changed the idle loop, for some reason 7447A cpus started hanging when we put them into nap mode. Changing to the recommended sequence fixes that. The complexity here is that the recommended sequence is a loop that keeps putting the cpu back into nap mode. Clearly we need some way to break out of the loop when an interrupt (external interrupt, decrementer, performance monitor) occurs. Here we use a bit in the thread_info struct to indicate that we need this, and the exception entry code notices this and arranges for the exception to return to the value in the link register, thus breaking out of the loop. We use a new `local_flags' field in the thread_info which we can alter without needing to use an atomic update sequence. The PPC970 has the same recommended sequence, so we do the same thing there too. This also fixes a bug in the kernel stack overflow handling code on 32-bit, since it was causing a value that we needed in a register to get trashed. Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | [PATCH] spufs: fix context-switch decrementer codeJordi Caubet2006-04-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We found that when the 'decrementer' is saved, the PPE saves the current time 'csa->suspend_time'. When restoring the 'decrementer', (Step 34) decrementer seems to be adjusted with the number of cycles th= at a spu thread has not been running. In that code it is missing a substract ('-') because 'delta_time' is assigned a not substracted(see bellow). Acked-by: Mark Nutter <mnutter@us.ibm.com> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | [PATCH] powerpc32: Set cpu explicitly in kernel compilesOlaf Hering2006-04-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Compile the 32bit kernel with -mcpu=powerpc. This reduces the imagesize when a compiler is used that defaults to -mtune=power4. It inserts lots of nops to please the 64bit cpu instruction scheduling. But all these nops are not needed for 32bit kernels. Example with SLES10 gcc 4.1.0 and arch/powerpc/configs/pmac32_defconfig: vmlinux vmlinux.strip vmlinux.gz -O2 4980515 4187528 1846829 -Os 4618801 3827084 1673333 -O2 -mcpu=powerpc 4738851 3945868 1816253 -Os -mcpu=powerpc 4532785 3741068 1664688 Signed-off-by: Olaf Hering <olh@suse.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | [PATCH] powerpc/pseries: bugfix: balance calls to pci_device_putLinas Vepstas2006-04-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Repeated calls to eeh_remove_device() can result in multiple (and thus unbalanced) calls to pci_dev_put(). Make sure the pci_device_put() is called only once (since there was only one call to the matching pci_device_get()). Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | [PATCH] powerpc: Fix machine detection in prom_init.cMichael Ellerman2006-04-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In e8222502ee6157e2713da9e0792c21f4ad458d50 the detection of machine types in prom_init broke for some machines. We should be checking /device_type instead of /model. This should make Power3 and Power4 boot again. Haven't been able to test this. We also need to relocate before comparing. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | [PATCH] ppc32: Fix string comparing in platform_notify_mapVitaly Bordug2006-04-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixed odd function behavior when dev->bus_id does not contain '.' - it compared that case 0 characters of the string and hereby reported success and executed callback. Now bus_id's are compared correctly, extra callback triggering eliminated. Signed-off-by: Vitaly Bordug <vbordug@ru.mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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