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2006-03-25[PATCH] x86_64: Use cpumask bitops for cpu_vm_maskBrian Gerst
cpu_vm_mask is of type cpumask_t, so use the proper bitops. Signed-off-by: Brian Gerst <bgerst@didntduck.org> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Try to allocate node memmap near the end of nodeAndi Kleen
This fixes problems with very large nodes (over 128GB) filling up all of the first 4GB with their mem_map and not leaving enough space for the swiotlb. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Force broadcast timer on AMD systems with C3 too.Andi Kleen
Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Change default setting for noexec32 to match i386 kernelAndi Kleen
This means i386 processes compiled with a recent compiler will get non executable heap by default now. This is the same default as a 32bit PAE kernel would use on a NX enabled CPU. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Reorder one field of the PDA to reduce paddingArjan van de Ven
This reorders the mmu_state int in the pda, such that there is no more padding (there currently is 4 bytes of padding). Boot tested. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Limit max number of CPUs to 255Andi Kleen
Because 256 causes overflows in some code that stores them in 8 bit fields and the x86 APIC architecture cannot handle more than 255 anyways. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: fix orphaned bits of timer init messagesChuck Ebbert
When x86_64 timer init messages were changed to use apic verbosity levels, two messages were missed and one got the wrong level. This causes the last word of a suppressed message to print on a line by itself. Fix that so either the entire message prints or none of it does. Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Quieten down microcode update driverAndi Kleen
Only log data in microcode driver when something is changed Otherwise it was far too noisy on large systems. Also remove the printk when it is unloaded. Cc: tigran@veritas.com Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Basic reorder infrastructureArjan van de Ven
This patch puts the infrastructure in place to allow for a reordering of functions based inside the vmlinux. The general idea is that it is possible to put all "common" functions into the first 2Mb of the code, so that they are covered by one TLB entry. This as opposed to the current situation where a typical vmlinux covers about 3.5Mb (on x86-64) and thus 2 TLB entries. This is done by enabling the -ffunction-sections flag in gcc, which puts each function in its own ELF section, so that the linker can then order them in a way defined by the linker script. As per previous discussions, Linus said he wanted a "static" list for this, eg a list provided by the kernel tarbal, so that most people have the same ordering at least. A script is provided to create this list based on readprofile(1) output. The included list is provisional, and entirely biased on my own testbox and me running a few kernel compiles and some other things. I think that to get to a better list we need to invite people to submit their own profiles, and somehow add those all up and base the final list on that. I'm willing to do that effort if this is ends up being the prefered approach. Such an effort probably needs to be repeated like once a year or so to adopt to the changing nature of the kernel. Made it a CONFIG with default n because it increases link times dramatically. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Always use IO-APIC routing for timer.Andi Kleen
I tested it on a couple of chipsets and it worked everywhere so it should be ok as default for now. So far I haven't done the great purge of the useless old check_timer code yet though. Can be overwritten with enable_8254_timer in the worst case Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Don't invoke OOM killer during dma_alloc_coherent()Andi Kleen
There is a fallback logic, so it's better to not use the OOM killer in the allocations. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Don't invoke OOM killer while allocating floppy DMA buffersAndi Kleen
Floppy can fall back to smaller buffers, so don't do OOM killing. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Reename CMOS update warningAndi Kleen
Was disabled due to an old bug, long gone. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Fix formatting in time.cAndi Kleen
Only white space changes, code should be identical Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Handle years beyond 2100Andi Kleen
ACPIv2 has an official but optional way to get a date >2100. Use it. But all the platforms I tested didn't seem to support it. But anyways the x86-64 kernel should be ready for the 22nd century now. Actually i shouldn't care about this because I will be dead by then @) Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Patch to make the head.S-must-be-first-in-vmlinux order explicitArjan van de Ven
This patch puts the code from head.S in a special .bootstrap.text section. I'm working on a patch to reorder the functions in the kernel (I'll post that later), but for x86-64 at least the kernel bootstrap requires that the head.S functions are on the very first page/pages of the kernel text. This is understandable since the bootstrap is complex enough already and not a problem at all, it just means they aren't allowed to be reordered. This patch puts these special functions into a separate section to document this, and to guarantee this in the light of possibly reordering the rest later. (So this patch doesn't fix a bug per se, but makes things more robust by making the order of these functions explicit) Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Add __init to fixmap functions that are only called during bootAndi Kleen
Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Implement early DMI scanningAndi Kleen
There are more and more cases where we need to know DMI information early to work around bugs. i386 already had early DMI scanning, but x86-64 didn't. Implement this now. This required some cleanup in the i386 code. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Clean up and tweak ACPI blacklist year codeAndi Kleen
- Move the core parser into dmi_scan.c. It can be useful for other subsystems too. - Differentiate between field doesn't exist and field is 0 or unparseable. The first case is likely an old BIOS with broken ACPI, the later is likely a slightly buggy BIOS where someone forget to edit the date. Don't blacklist in the later case. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: s/Overwrite/Override/ in arch/x86-64Dave Jones
s/Overwrite/Override/ Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Move kernel to 2MBAndi Kleen
As suggested by Andi (and Alan), move the default kernel location from 1Mb to 2Mb, to align to the start of a TLB entry. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: prefetch the mmap_sem in the fault pathArjan van de Ven
In a micro-benchmark that stresses the pagefault path, the down_read_trylock on the mmap_sem showed up quite high on the profile. Turns out this lock is bouncing between cpus quite a bit and thus is cache-cold a lot. This patch prefetches the lock (for write) as early as possible (and before some other somewhat expensive operations). With this patch, the down_read_trylock basically fell out of the top of profile. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Implement compat code for raw1394 read/writeAndi Kleen
Not for the ioctls so far because I was too lazy. Cc: bcollins@debian.org Cc: dan@dennedy.org Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: to use lapic ids instead of initial apic idsRavikiran G Thirumalai
phys_proc_id[] on AMD boxes is right now populated with the initial apic id, obtained by the cpuid instruction. But, the initial apic id need not be the local apic id on clustered APIC systems (see comment at x86_64/kernel/genapic_cluster.c, line 110). On vSMPowered with AMD CPUs the cpu_to_node will turn out to be incorrect (as apicid_to_node[] is indexed by the initial apic id rather than the local apic id). On vSMPowered boxes with Intel CPUs this is working correctly as phys_proc_id[] is initialized correctly in detect_ht(). This fixes AMD boot path according to specification, to use the correct routines for local apic id and socket ids. We use hard_smp_processor_id() to read the local apic id, and phys_pkg_id() to determine socket id for phys_proc_id[] Patch tested on Tyan multicore boxes as well as vSMPowered boxes. Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org> Signed-off-by: Shai Fultheim <shai@scalex86.org> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: miscellaneous cleanupJan Beulich
- adjust limits of GDT/IDT pseudo-descriptors (some were off by one) - move empty_zero_page into .bss.page_aligned - move cpu_gdt_table into .data.page_aligned - move idt_table into .bss - align inital_code and init_rsp - eliminate pointless (re-)declaration of idt_table in traps.c Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Make pfn_valid work early in bootAndi Kleen
It needs num_physpages, so initialize it early. It's later overwritten again. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Clean up white space in traps.cRoberto Nibali
Attached is a small code style cleanup patch that resulted from my skimming through the arch/x86_64/kernel/traps.c code to figure out what went haywire. Signed-off-by: Roberto Nibali <ratz@drugphish.ch> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Fix wrong PCI ID for ALI M1695 AGP bridgeHenrik Kretzschmar
[description by AK] Made a cut'n'paste error when adding the entry for the ALI M1695 AGP bridge and added a second entry for the 1689 Cc: Dave Jones <davej@redhat.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Don't define string functions to builtinAndi Kleen
gcc should handle this anyways, and it causes problems when sprintf is turned into strcpy by gcc behind our backs and the C fallback version of strcpy is actually defining __builtin_strcpy Then drop -ffreestanding from the main Makefile because it isn't needed anymore and implies -fno-builtin, which is wrong now. (it was only added for x86-64, so dropping it should be safe) Noticed by Roman Zippel Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Check that early arguments are words on their ownAndi Kleen
We've always had the problem that arguments only did a prefix match, which resulted e.g. in noapic and noapictimer getting confused. Fix the early argument parsing code to always check that arguments are whole words (except for those that take additional arguments of course) I factored out the checking code for that while also makes the code easier to maintain. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: remove dead do_softirq_thunkJan Beulich
Appearantly a left-over... Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: actively synchronize vmalloc area when registering certain ↵Jan Beulich
callbacks While the modular aspect of the respective i386 patch doesn't apply to x86-64 (as the top level page directory entry is shared between modules and the base kernel), handlers registered with register_die_notifier() are still under similar constraints for touching ioremap()ed or vmalloc()ed memory. The likelihood of this problem becoming visible is of course significantly lower, as the assigned virtual addresses would have to cross a 2**39 byte boundary. This is because the callback gets invoked (a) in the page fault path before the top level page table propagation gets carried out (hence a fault to propagate the top level page table entry/entries mapping to module's code/data would nest infinitly) and (b) in the NMI path, where nested faults must absolutely not happen, since otherwise the IRET from the nested fault re-enables NMIs, potentially resulting in nested NMI occurences. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Use cpu_relax in poll loop in GART IOMMUAndi Kleen
The code waits for the GART to clear the TLB flush bit. Use cpu_relax in this time to allow hypervisors to yield the CPU in this time. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Report local APIC ID when initializing CPUAndi Kleen
Makes some debugging easier. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Don't need to read PIT in timer handler when PM timer is usedAndi Kleen
The PM timer path through main_timer_handler doesn't need the delay variable because it figures it out in a different way. Don't try to read it from the PIT. With stopped PIT timer it is even useless. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: cleanup allocating logical cpu numbers in x86_64Ashok Raj
Minor cleanup to lend better for physical CPU hotplug. Earlier way of using num_processors as index doesnt fit if CPUs come and go. This makes the code little bit better to read, and helps physical hotplug use the same functions as boot. Reserving CPU0 for BSP is too late to be done in smp_prepare_boot_cpu(). Since logical assignments from MADT is already done via setup_arch()->acpi_boot_init()->parse lapic Signed-off-by: Ashok Raj <ashok.raj@intel.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: save FPU context slightly laterJan Beulich
Touching of the floating point state in a kernel debugger must be NMI-safe, specifically math_state_restore() must be able to deal with being called out of an NMI context. In order to do that reliably, the context switch code must take care to not leave a window open where the current task's TS_USEDFPU flag and CR0.TS could get out of sync. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: eliminate set_debug()Jan Beulich
For consistency and to have only a single place of definition, replace set_debug() uses with set_debugreg(), and eliminate the definition of thj former. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: disallow multi-byte hardware execution breakpointsJan Beulich
While AMD formally permits multi-byte execution breakpoints, Intel disallows 8-byte as much as 2- or 4-byte ones. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: cpu_pda array to macro followup correctionJan Beulich
Fix one place where the previous change of cpu_pda from being an array to being a macro was not properly carried out. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Rename struct node in x86-64 NUMA code to struct bootnodeAndi Kleen
It conflicts with the struct node in node.h Actually the x86-64 version was there first, but .. Suggested by Jan Beulich Cc: jbeulich@novell.com Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Increase the variability of the process stack on 64bit ↵Andi Kleen
architectures 8MB is not really very random, use 1GB (or more with larger page sizes) instead. Also use the low bits of the random generator output now instead of throwing them away. Only enabled on x86-64 right now. Other architectures need to add a suitable STACK_RND_MASK Cc: mingo@elte.hu Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86-64: Use -mtune=generic for generic kernelsAndi Kleen
The upcomming gcc 4.2 got a new option -mtune=generic to tune code for both common AMD and Intel CPUs. Use this option when available for generic kernels. On x86-64 it is used with CONFIG_GENERIC_CPU. On i386 it is enabled with CONFIG_X86_GENERIC. It won't affect the base line CPU support in any ways and also not the minimum supported CPU. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Use correct PUD for memory hotaddJan Beulich
Memory >39bits has a different PUD. Cc: "Tolentino, Matthew E" <matthew.e.tolentino@intel.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Update defconfigAndi Kleen
Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreqLinus Torvalds
* master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq: [CPUFREQ] kzalloc conversion for gx-suspmod [CPUFREQ] Whitespace cleanup [CPUFREQ] Mark longhaul driver as broken. [PATCH] cpufreq: fix section mismatch warnings [CPUFREQ] Fix the p4-clockmod N60 errata workaround. [CPUFREQ] Fix handling for CPU hotplug [CPUFREQ] powernow-k8: Let cpufreq driver handle affected CPUs [CPUFREQ] Lots of whitespace & CodingStyle cleanup. [CPUFREQ] Remove duplicate cpuinfo struct [CPUFREQ] Silence powernow-k8 warning on k7's.
2006-03-25Merge branch 'for-linus' of ↵Linus Torvalds
master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband * 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband: IPoIB: P_Key change event handling IB/mthca: Fix modify QP error path IPoIB: Fix network interface "RUNNING" status IB/mthca: Fix indentation IB/mthca: Fix uninitialized variable in mthca_alloc_qp() IB/mthca: Check SRQ limit in modify SRQ operation IB/mthca: Check that SRQ WQE size does not exceed device's max value IB/mthca: Check that sgid_index and path_mtu are valid in modify_qp IB/srp: Use a fake scatterlist for non-SG SCSI commands IPoIB: Pass correct pointer when flushing child interfaces
2006-03-25Merge branch 'upstream-linus' of git://oss.oracle.com/home/sourcebo/git/ocfs2Linus Torvalds
* 'upstream-linus' of git://oss.oracle.com/home/sourcebo/git/ocfs2: ocfs2: finally remove MLF* macros ocfs2: don't use MLF* in the file system ocfs2: don't use MLF* in dlm/ files ocfs2: don't use MLF* in cluster/ files [PATCH] ocfs2: dlm recovery fixes [PATCH] ocfs2: fix hang in dlm lock resource mastery ocfs2: use __attribute__ format
2006-03-25Merge branch 'release' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] New IA64 core/thread detection patch [IA64] Increase max node count on SN platforms [IA64] Increase max node count on SN platforms [IA64] Increase max node count on SN platforms [IA64] Increase max node count on SN platforms [IA64] Tollhouse HP: IA64 arch changes [IA64] cleanup dig_irq_init [IA64] MCA recovery: kernel context recovery table IA64: Use early_parm to handle mvec_name and nomca [IA64] move patchlist and machvec into init section [IA64] add init declaration - nolwsys [IA64] add init declaration - gate page functions [IA64] add init declaration to memory initialization functions [IA64] add init declaration to cpu initialization functions [IA64] add __init declaration to mca functions [IA64] Ignore disabled Local SAPIC Affinity Structure in SRAT [IA64] sn_check_intr: use ia64_get_irr() [IA64] fix ia64 is_hugepage_only_range
2006-03-25Merge master.kernel.org:/pub/scm/linux/kernel/git/sam/kbuildLinus Torvalds
* master.kernel.org:/pub/scm/linux/kernel/git/sam/kbuild: (46 commits) kbuild: remove obsoleted scripts/reference_* files kbuild: fix make help & make *pkg kconfig: fix time ordering of writes to .kconfig.d and include/linux/autoconf.h Kconfig: remove the CONFIG_CC_ALIGN_* options kbuild: add -fverbose-asm to i386 Makefile kbuild: clean-up genksyms kbuild: Lindent genksyms.c kbuild: fix genksyms build error kbuild: in makefile.txt note that Makefile is preferred name for kbuild files kbuild: replace PHONY with FORCE kbuild: Fix bug in crc symbol generating of kernel and modules kbuild: change kbuild to not rely on incorrect GNU make behavior kbuild: when warning symbols exported twice now tell user this is the problem kbuild: fix make dir/file.xx when asm symlink is missing kbuild: in the section mismatch check try harder to find symbols kbuild: fix section mismatch check for unwind on IA64 kbuild: kill false positives from section mismatch warnings for powerpc kbuild: kill trailing whitespace in modpost & friends kbuild: small update of allnoconfig description kbuild: make namespace.pl CROSS_COMPILE happy ... Trivial conflict in arch/ppc/boot/Makefile manually fixed up