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2011-02-04powerpc/pci: Make both ppc32 and ppc64 use sysdata for pci_controllerGrant Likely9-42/+23
Currently, ppc32 uses sysdata for the pci_controller pointer, and ppc64 uses it to hold the device_node pointer. This patch moves the of_node pointer into (struct pci_bus*)->dev.of_node and (struct pci_dev*)->dev.of_node so that sysdata can be converted to always use the pci_controller pointer instead. It also fixes up the allocating of pci devices so that the of_node pointer gets assigned consistently and increments the ref count. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-02-04of/pci: move of_irq_map_pci() into generic codeSebastian Andrzej Siewior4-99/+11
There is a tiny difference between PPC32 and PPC64. Microblaze uses the PPC32 variant. Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc> [grant.likely@secretlab.ca: Added comment to #endif, moved documentation block to function implementation, fixed for non ppc and microblaze compiles] Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-02-04memory hotplug: Define memory_block_size_bytes for powerpc/pseriesNathan Fontenot1-13/+53
Define a version of memory_block_size_bytes() for powerpc/pseries such that a memory block spans an entire lmb. Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com> Reviewed-by: Robin Holt <holt@sgi.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-02-02powerpc/476: Workaround for PLB6 hangDave Kleikamp1-0/+35
The 476FP core may hang if an instruction fetch happens during an msync following a tlbsync. This workaround makes sure that enough instruction cache lines are pre-fetched before executing the msync. (sync and msync are the same to the compiler.) Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2011-02-02powerpc/476: define specific cpu table entry DD2 coreDave Kleikamp2-5/+20
The DD2 core still has some unstability. Define CPU_FTR_476_DD2 to enable workarounds in later patches. This is based on an earlier, unreleased patch for DD1 by Ben Herrenschmidt. Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2011-02-02powerpc/44x: PHY fixup for USB on canyonlands boardRupjyoti Sarmah6-2/+150
This fix is a reset for USB PHY that requires some amount of time for power to be stable on Canyonlands. Signed-off-by: Rupjyoti Sarmah <rsarmah@apm.com> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2011-02-02powerpc/44x: Add USB DWC DTS entry to Canyonlands boardTirumala Marri1-0/+13
Add Synopsys Designware DTS entry for 460EX based Canyonlands board. Signed-off-by: Tirumala R Marri<tmarri@apm.com> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2011-01-31Merge branch 'tip/rtmutex' of ↵Thomas Gleixner1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into core/locking *git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace tip/rtmutex: rtmutex: Simplify PI algorithm and make highest prio task get lock
2011-01-27rwsem: Move duplicate function prototypes to linux/rwsem.hThomas Gleixner1-5/+0
All architecture specific rwsem headers carry the same function prototypes. Just x86 adds asmregparm, which is an empty define on all other architectures. S390 has a stale rwsem_downgrade_write() prototype. Remove the duplicates and add the prototypes to linux/rwsem.h Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: David Howells <dhowells@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Richard Henderson <rth@twiddle.net> Acked-by: Tony Luck <tony.luck@intel.com> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Acked-by: David Miller <davem@davemloft.net> Cc: Chris Zankel <chris@zankel.net> LKML-Reference: <20110126195833.970840140@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-01-27rwsem: Unify the duplicate rwsem_is_locked() inlinesThomas Gleixner1-5/+0
Instead of having the same implementation in each architecture, move it to linux/rwsem.h and remove the duplicates. It's unlikely that an arch will ever implement something different, but we can deal with that when it happens. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: David Howells <dhowells@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Matt Turner <mattst88@gmail.com> Acked-by: Tony Luck <tony.luck@intel.com> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Acked-by: David Miller <davem@davemloft.net> Cc: Chris Zankel <chris@zankel.net> LKML-Reference: <20110126195833.876773757@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-01-27rwsem: Move duplicate init macros and functions to linux/rwsem.hThomas Gleixner1-27/+0
The rwsem initializers and related macros and functions are mostly the same. Some of them lack the lockdep initializer, but having it in place does not matter for architectures which do not support lockdep. powerpc, sparc, x86: No functional change sh, s390: Removes the duplicate init_rwsem (inline and #define) alpha, ia64, xtensa: Use the lockdep capable init function in lib/rwsem.c which is just uninlining the init function for the LOCKDEP=n case Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: David Howells <dhowells@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Matt Turner <mattst88@gmail.com> Acked-by: Tony Luck <tony.luck@intel.com> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Acked-by: David Miller <davem@davemloft.net> Cc: Chris Zankel <chris@zankel.net> LKML-Reference: <20110126195833.771812729@linutronix.de>
2011-01-27rwsem: Move duplicate struct rwsem declaration to linux/rwsem.hThomas Gleixner1-9/+0
The difference between these declarations is the data type of the count member and the lack of lockdep in some architectures/ long is equivivalent to signed long and the #ifdef guarded dep_map member does not hurt anyone. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: David Howells <dhowells@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Matt Turner <mattst88@gmail.com> Acked-by: Tony Luck <tony.luck@intel.com> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Acked-by: David Miller <davem@davemloft.net> Cc: Chris Zankel <chris@zankel.net> LKML-Reference: <20110126195833.679641914@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-01-27rwsem: Cleanup includesThomas Gleixner1-5/+0
All rwsem implementations include the same headers. Include them from include/linux/rwsem.h Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: David Howells <dhowells@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Matt Turner <mattst88@gmail.com> Acked-by: Tony Luck <tony.luck@intel.com> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Acked-by: David Miller <davem@davemloft.net> Cc: Chris Zankel <chris@zankel.net> LKML-Reference: <20110126195833.483520950@linutronix.de>
2011-01-25percpu: align percpu readmostly subsection to cachelineTejun Heo1-1/+1
Currently percpu readmostly subsection may share cachelines with other percpu subsections which may result in unnecessary cacheline bounce and performance degradation. This patch adds @cacheline parameter to PERCPU() and PERCPU_VADDR() linker macros, makes each arch linker scripts specify its cacheline size and use it to align percpu subsections. This is based on Shaohua's x86 only patch. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Shaohua Li <shaohua.li@intel.com>
2011-01-24Merge branch 'perf-fixes-for-linus' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: perf tools: Fix time function double declaration with glibc perf tools: Fix build by checking if extra warnings are supported perf tools: Fix build when using gcc 3.4.6 perf tools: Add missing header, fixes build perf tools: Fix 64 bit integer format strings perf test: Fix build on older glibcs perf: perf_event_exit_task_context: s/rcu_dereference/rcu_dereference_raw/ perf test: Use cpu_map->[cpu] when setting affinity perf symbols: Fix annotation of thumb code perf: Annotate cpuctx->ctx.mutex to avoid a lockdep splat powerpc, perf: Fix frequency calculation for overflowing counters (FSL version) perf: Fix perf_event_init_task()/perf_event_free_task() interaction perf: Fix find_get_context() vs perf_event_exit_task() race
2011-01-22Merge branch 'irq-cleanup-for-linus' of ↵Linus Torvalds1-25/+3
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'irq-cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (37 commits) um: Use generic irq Kconfig tile: Use generic irq Kconfig sparc: Use generic irq Kconfig score: Use generic irq Kconfig powerpc: Use generic irq Kconfig parisc: Use generic irq Kconfig mn10300: Use generic irq Kconfig microblaze: Use generic irq Kconfig m68knommu: Use generic irq Kconfig ia64: Use generic irq Kconfig frv: Use generic irq Kconfig blackfin: Use generic irq Kconfig alpha: Use generic irq Kconfig genirq: Remove __do_IRQ m32r: Convert to generic irq Kconfig m32r: Convert usrv platform irq handling m32r: Convert opsput_lcdpld irq chip m32r: Convert opsput lanpld irq chip m32r: Convert opsput pld irq chip m32r: Convert opsput irq chip ...
2011-01-22Merge branch 'devicetree/merge' of git://git.secretlab.ca/git/linux-2.6Linus Torvalds2-4/+4
* 'devicetree/merge' of git://git.secretlab.ca/git/linux-2.6: powerpc/83xx: fix build failures on dt compatible list.
2011-01-22Merge branch 'merge' of ↵Linus Torvalds34-344/+332
git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (34 commits) powerpc/mpic: Fix mask/unmask timeout message powerpc/pseries: Add BNX2=m to defconfig powerpc: Enable 64kB pages and 1024 threads in pseries config powerpc: Disable mcount tracers in pseries defconfig powerpc/boot/dts: Install dts from the right directory powerpc: machine_check_generic is wrong on 64bit powerpc: Check RTAS extended log flag before checking length powerpc: Fix corruption when grabbing FWNMI data powerpc: Rework pseries machine check handler powerpc: Don't silently handle machine checks from userspace powerpc: Remove duplicate debugger hook in machine_check_exception powerpc: Never halt RTAS error logging after receiving an unrecoverable machine check powerpc: Don't force MSR_RI in machine_check_exception powerpc: Print 32 bits of DSISR in show_regs powerpc/kdump: Disable ftrace during kexec powerpc/kdump: Move crash_kexec_stop_spus to kdump crash handler powerpc/kexec: Remove empty ppc_md.machine_kexec_prepare powerpc/kexec: Don't initialise kexec hooks to default handlers powerpc/kdump: Remove ppc_md.machine_crash_shutdown powerpc/kexec: Remove ppc_md.machine_kexec ...
2011-01-21powerpc: Use generic irq KconfigThomas Gleixner1-21/+3
No functional change. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21genirq: Remove __do_IRQThomas Gleixner1-4/+0
All architectures are finally converted. Remove the cruft. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Richard Henderson <rth@twiddle.net> Cc: Mike Frysinger <vapier@gentoo.org> Cc: David Howells <dhowells@redhat.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Greg Ungerer <gerg@uclinux.org> Cc: Michal Simek <monstr@monstr.eu> Acked-by: David Howells <dhowells@redhat.com> Cc: Kyle McMartin <kyle@mcmartin.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Chen Liqin <liqin.chen@sunplusct.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Chris Metcalf <cmetcalf@tilera.com> Cc: Jeff Dike <jdike@addtoit.com>
2011-01-21powerpc/mpic: Fix mask/unmask timeout messageScott Wood1-2/+4
Don't say that enable timed out when it was disable, and show which IRQ had the problem. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc/pseries: Add BNX2=m to defconfigNishanth Aravamudan1-0/+1
Upcoming servers will include a Broadcom NIC, add to the defconfig to increase testing coverage and make sure mainline builds come up with networking. Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc: Enable 64kB pages and 1024 threads in pseries configAnton Blanchard1-1/+3
- Enable 64kB pages so it gets some regular testing. - The largest POWER7 has 1024 threads so bump NR_CPUS it to match. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc: Disable mcount tracers in pseries defconfigAnton Blanchard1-2/+0
IRQSOFF_TRACER and STACK_TRACER force the kernel to be built with -pg which is a substantial overhead. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc/boot/dts: Install dts from the right directoryBen Hutchings1-1/+1
The dts-installed variable is initialised using a wildcard path that will be expanded relative to the build directory. Use the existing variable dtstree to generate an absolute wildcard path that will work when building in a separate directory. Reported-by: Gerhard Pircher <gerhard_pircher@gmx.net> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Tested-by: Gerhard Pircher <gerhard_pircher@gmx.net> [against 2.6.32] Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc: machine_check_generic is wrong on 64bitAnton Blanchard1-23/+0
Decoding machine checks is CPU specific and so machine_check_generic doesn't do the right thing on 64bit chips. Luckily we never call into this code because we call ppc_md.machine_check_exception instead if available. Since we check cur_cpu_spec->machine_check before calling it, we may as well remove machine_check_generic from 64bit archs. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc: Check RTAS extended log flag before checking lengthAnton Blanchard1-1/+1
The spec suggests we should first check the extended log flag before checking the length field. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc: Fix corruption when grabbing FWNMI dataAnton Blanchard1-14/+38
The FWNMI code uses a global buffer without any locks to read the RTAS error information. If two CPUs take a machine check at once then we will corrupt this buffer. Since most FWNMI rtas messages are not of the extended type, we can create a 64bit percpu buffer and use it where possible. If we do receive an extended RTAS log then we fall back to the old behaviour of using the global buffer. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc: Rework pseries machine check handlerAnton Blanchard1-18/+30
Rework pseries machine check handler: - If MSR_RI isn't set, we cannot recover even if the machine check was fully recovered - Rename nonfatal to recovered - Handle RTAS_DISP_LIMITED_RECOVERY - Use BUS_MCEERR_AR instead of BUS_ADRERR - Don't check all the RTAS error log fields when receiving a synchronous machine check. Recent versions of the pseries firmware do not fill them in during a machine check and instead send a follow up error log with the detailed information. If we see a synchronous machine check, and we came from userspace then kill the task. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc: Don't silently handle machine checks from userspaceAnton Blanchard1-5/+0
If a machine check comes from userspace we send a SIGBUS to the task and fail to printk anything. If we are taking machine checks due to bad hardware we want to know about it right away. Furthermore if we don't complain loudly then it will look a lot like a bug in the userspace application, potentially causing a lot of confusion. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc: Remove duplicate debugger hook in machine_check_exceptionAnton Blanchard1-2/+0
We are calling debugger_fault_handler twice in machine_check_exception. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc: Never halt RTAS error logging after receiving an unrecoverable ↵Anton Blanchard1-1/+1
machine check Newer versions of the System p firwmare send a partial RTAS error log in the machine check handler with a more detailed response appearing sometime later via check event. This means at machine check time we do not have enough information to ascertain exactly what went on. Furthermore, I have found the RTAS error logs in the machine check handler contain no useful information, so halting on them makes little sense. If we want to halt it would make more sense to do it following the error log received sometime later via check event. In light of this, never halt the error log in the pseries machine check handler. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc: Don't force MSR_RI in machine_check_exceptionAnton Blanchard1-4/+1
We should never force MSR_RI on. If we take a machine check with MSR_RI off then we have no chance of recovering safely. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc: Print 32 bits of DSISR in show_regsAnton Blanchard1-1/+1
We were printing 64 bits of DSISR in show_regs even though it is 32 bit. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc/kdump: Disable ftrace during kexecAnton Blanchard1-0/+7
We should disable ftrace during kexec, some of the tracers are very invasive and we do not want them going off while doing the low level work of swapping one kernel out for another. This mirrors what we do on x86. Even though we cannot return from a kexec on powerpc (since we do not implement CONFIG_KEXEC_JUMP), add the restore code in case we do one day. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc/kdump: Move crash_kexec_stop_spus to kdump crash handlerAnton Blanchard3-78/+72
Use the crash handler hooks to run the SPU stop code, just like we do for ehea and cell RAS code. While I'm here I noticed "CPUSs reliabally" so fix the spelling MISTAKESs reliabally. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc/kexec: Remove empty ppc_md.machine_kexec_prepareAnton Blanchard2-22/+0
We check for a valid handler before calling ppc_md.machine_kexec_prepare so we can just remove these empty handlers. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc/kexec: Don't initialise kexec hooks to default handlersAnton Blanchard2-13/+0
There's no need to initialise ppc_md.machine_kexec and ppc_md.machine_kexec_prepare to the default handlers. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc/kdump: Remove ppc_md.machine_crash_shutdownAnton Blanchard4-12/+1
No one uses ppc_md.machine_crash_shutdown, so remove it. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc/kexec: Remove ppc_md.machine_kexecAnton Blanchard2-10/+1
No one uses ppc_md.machine_kexec, so remove it. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc/kexec: Remove ppc_md.machine_kexec_cleanupAnton Blanchard2-5/+0
No one uses ppc_md.machine_kexec_cleanup, so remove it. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc/kexec: Move all ppc_md kexec function pointers togetherAnton Blanchard1-3/+2
Move all the kexec handlers together. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc/cell: Use system_wq in cpufreq_spudemandTejun Heo2-22/+23
With cmwq, there's no reason to use a separate workqueue in cpufreq_spudemand. Use system_wq instead. The work items are already sync canceled on stop, so it's already guaranteed that no work is running when spu_gov_exit() is entered. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: linuxppc-dev@lists.ozlabs.org Cc: Dave Jones <davej@redhat.com> Cc: cpufreq@vger.kernel.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc/rtas_flash: Use simple_read_from_bufferAkinobu Mita1-47/+6
Simplify read file operation for /proc/powerpc/rtas/* interface by using simple_read_from_buffer. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc/spufs: Use simple_write_to_bufferAkinobu Mita1-20/+7
Simplify several write fileoperations for spufs by using simple_write_to_buffer(). Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc/ppc32/tracing: Add stack frame to calls of trace_hardirqs_on/offSteven Rostedt1-0/+11
32-bit variant of the previous patch for 64-bit: << When an interrupt occurs in userspace, we can call trace_hardirqs_on/off() With one level stack. But if we have irqsoff tracing enabled, it checks both CALLER_ADDR0 and CALLER_ADDR1. The second call goes two stack frames up. If this is from user space, then there may not exist a second stack.... >> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc/ppc64/tracing: Add stack frame to calls of trace_hardirqs_on/offSteven Rostedt1-10/+30
When an interrupt occurs in userspace, we can call trace_hardirqs_on/off() With one level stack. But if we have irqsoff tracing enabled, it checks both CALLER_ADDR0 and CALLER_ADDR1. The second call goes two stack frames up. If this is from user space, then there may not exist a second stack. Add a second stack when calling trace_hardirqs_on/off() otherwise the following oops might occur: Oops: Kernel access of bad area, sig: 11 [#1] PREEMPT SMP NR_CPUS=2 PA Semi PWRficient last sysfs file: /sys/block/sda/size Modules linked in: ohci_hcd ehci_hcd usbcore NIP: c0000000000e1c00 LR: c0000000000034d4 CTR: 000000011012c440 REGS: c00000003e2f3af0 TRAP: 0300 Not tainted (2.6.37-rc6+) MSR: 9000000000001032 <ME,IR,DR> CR: 48044444 XER: 20000000 DAR: 00000001ffb9db50, DSISR: 0000000040000000 TASK = c00000003e1a00a0[2088] 'emacs' THREAD: c00000003e2f0000 CPU: 1 GPR00: 0000000000000001 c00000003e2f3d70 c00000000084e0d0 c0000000008816e8 GPR04: 000000001034c678 000000001032e8f9 0000000010336540 0000000040020000 GPR08: 0000000040020000 00000001ffb9db40 c00000003e2f3e30 0000000060000000 GPR12: 100000000000f032 c00000000fff0280 000000001032e8c9 0000000000000008 GPR16: 00000000105be9c0 00000000105be950 00000000105be9b0 00000000105be950 GPR20: 00000000ffb9dc50 00000000ffb9dbf0 00000000102f0000 00000000102f0000 GPR24: 00000000102e0000 00000000102f0000 0000000010336540 c0000000009ded38 GPR28: 00000000102e0000 c0000000000034d4 c0000000007ccb10 c00000003e2f3d70 NIP [c0000000000e1c00] .trace_hardirqs_off+0xb0/0x1d0 LR [c0000000000034d4] decrementer_common+0xd4/0x100 Call Trace: [c00000003e2f3d70] [c00000003e2f3e30] 0xc00000003e2f3e30 (unreliable) [c00000003e2f3e30] [c0000000000034d4] decrementer_common+0xd4/0x100 Instruction dump: 81690000 7f8b0000 419e0018 f84a0028 60000000 60000000 60000000 e95f0000 80030000 e92a0000 eb6301f8 2f800000 <eb890010> 41fe00dc a06d000a eb1e8050 ---[ end trace 4ec7fd2be9240928 ]--- Reported-by: Joerg Sommer <joerg@alea.gnuu.de> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21powerpc: Ensure the else case of feature sections will fitMichael Ellerman2-12/+34
When we create an alternative feature section, the else case must be the same size or smaller than the body. This is because when we patch the else case in we just overwrite the body, so there must be room. Up to now we just did this by inspection, but it's quite easy to enforce it in the assembler, so we should. The only change is to add the ifgt block, but that effects the alignment of the tabs and so the whole macro is modified. Also add a test, but #if 0 it because we don't want to break the build. Anyone who's modifying the feature macros should enable the test. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-21kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERTDavid Rientjes85-87/+87
The meaning of CONFIG_EMBEDDED has long since been obsoleted; the option is used to configure any non-standard kernel with a much larger scope than only small devices. This patch renames the option to CONFIG_EXPERT in init/Kconfig and fixes references to the option throughout the kernel. A new CONFIG_EMBEDDED option is added that automatically selects CONFIG_EXPERT when enabled and can be used in the future to isolate options that should only be considered for embedded systems (RISC architectures, SLOB, etc). Calling the option "EXPERT" more accurately represents its intention: only expert users who understand the impact of the configuration changes they are making should enable it. Reviewed-by: Ingo Molnar <mingo@elte.hu> Acked-by: David Woodhouse <david.woodhouse@intel.com> Signed-off-by: David Rientjes <rientjes@google.com> Cc: Greg KH <gregkh@suse.de> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jens Axboe <axboe@kernel.dk> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Robin Holt <holt@sgi.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-01-21Merge remote branch 'kumar/next' into mergeBenjamin Herrenschmidt9-16/+58
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