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2005-06-23[PATCH] streamline preempt_count type across archsJesper Juhl
The preempt_count member of struct thread_info is currently either defined as int, unsigned int or __s32 depending on arch. This patch makes the type of preempt_count an int on all archs. Having preempt_count be an unsigned type prevents the catching of preempt_count < 0 bugs, and using int on some archs and __s32 on others is not exactely "neat" - much nicer when it's just int all over. A previous version of this patch was already ACK'ed by Robert Love, and the only change in this version of the patch compared to the one he ACK'ed is that this one also makes sure the preempt_count member is consistently commented. Signed-off-by: Jesper Juhl <juhl-lkml@dif.dk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-23[PATCH] ppc64: pcibus_to_node fixChristoph Lameter
asm-generic/topology.h must also be included if CONFIG_NUMA is set in order to provide the fall back pcibus_to_node function. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-23[PATCH] ppc64: sparsemem memory modelAndy Whitcroft
Provide the architecture specific implementation for SPARSEMEM for PPC64 systems. Signed-off-by: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Mike Kravetz <kravetz@us.ibm.com> (in part) Signed-off-by: Martin Bligh <mbligh@aracnet.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-23[PATCH] ppc64: add early_pfn_to_nidAndy Whitcroft
Provide an implementation of early_pfn_to_nid for PPC64. This is used by memory models to determine the node from which to take allocations before the memory allocators are fully initialised. Signed-off-by: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Martin Bligh <mbligh@aracnet.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-23[PATCH] remove non-DISCONTIG use of pgdat->node_mem_mapDave Hansen
This patch effectively eliminates direct use of pgdat->node_mem_map outside of the DISCONTIG code. On a flat memory system, these fields aren't currently used, neither are they on a sparsemem system. There was also a node_mem_map(nid) macro on many architectures. Its use along with the use of ->node_mem_map itself was not consistent. It has been removed in favor of two new, more explicit, arch-independent macros: pgdat_page_nr(pgdat, pagenr) nid_page_nr(nid, pagenr) I called them "pgdat" and "nid" because we overload the term "node" to mean "NUMA node", "DISCONTIG node" or "pg_data_t" in very confusing ways. I believe the newer names are much clearer. These macros can be overridden in the sparsemem case with a theoretically slower operation using node_start_pfn and pfn_to_page(), instead. We could make this the only behavior if people want, but I don't want to change too much at once. One thing at a time. This patch removes more code than it adds. Compile tested on alpha, alpha discontig, arm, arm-discontig, i386, i386 generic, NUMAQ, Summit, ppc64, ppc64 discontig, and x86_64. Full list here: http://sr71.net/patches/2.6.12/2.6.12-rc1-mhp2/configs/ Boot tested on NUMAQ, x86 SMP and ppc64 power4/5 LPARs. Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Martin J. Bligh <mbligh@aracnet.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21[PATCH] ppc64 iSeries: allow build with no PCIStephen Rothwell
This patch allows iSeries to build with CONFIG_PCI=n. This is useful for partitions that have only virtual I/O. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21[PATCH] ppc64 iSeries: tidy up irq code after mergeStephen Rothwell
This patch just removes some dead code, fixes messages that referred to the file this code used to be in and inserts XmPciLpEvent_init into its caller. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21[PATCH] ppc64 iSeries: irq simple cleanupsStephen Rothwell
This patch is just simple cleanups to the iSeries irq code. - whitespace and comments - rearrange some functions to avoid forward declarations - remove XmPciLpEvent.h as its functions were declared elsewhere - remove decaration of function that no longer exists No semantic changes. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21[PATCH] ppc64 iSeries: remove some more members of iSeries_Device_NodeStephen Rothwell
The AgentId, PhbId, FrameId, CardLocation and Location members of iSeries_Device_Node are stored early in the boot process just so that a message about the device can be printed later in the boot process. Remove them and construct the message by doing the VPD parsing at the time the message is printed. Also remove a few unused defines in iSeries_VpdInfo.c. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21[PATCH] ppc64 iSeries: remove IoRetry from iSeries_Device_NodeStephen Rothwell
The IoRetry member of iSeries_Devide_Node is really only used locally, so remove it and replace it with a local variable. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21[PATCH] ppc64 iSeries: iSeries_pci.h cleanupsStephen Rothwell
Remove no longer used things from iSeries_pci.h. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21[PATCH] ppc64 iSeries: iommu.h cleanupsStephen Rothwell
The iommu_table_cb structure is iSeries specific, so move it to the header file that declares the function we pass it to. vio_tce_table and iommu_setup_iSeries no longer exist, so remove their declarations. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21[PATCH] ppc64 iSeries: remove iSeries_pci_reset.cStephen Rothwell
The file arch/ppc64/kernel/iSeries_pci_reset contains only one function that is not use anywhere (any more). Remove it. This function is the only user of the ReturnCode member of iSeries_Device_Node, so remove that as well. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21[PATCH] ppc64 iSeries: misc header cleanupsStephen Rothwell
Last of this round of the iSeries header cleanups - don't have two defines for the same thing (HvMaxArchitectedLps and HvMaxArchitectedVirtualLans) - HvCallSc.h only needs linux/types.h - remove unused struct definition - add "extern" to some more function declarations Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21[PATCH] ppc64 iSeries: tidy up some includes and HvCall.hStephen Rothwell
This patch removes some unused bits from HvCall.h and some unneeded #includes from other files. Also includes ItLpQueue.h in paca.h in preference to a stub declaration of struct ItLpQueue. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21[PATCH] ppc64 iSeries: cleanup ItLpQueue.hStephen Rothwell
Just white space cleaups and move process_iSeries_events into its only caller. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21[PATCH] ppc64 iSeries: remove HvCallCfg.hStephen Rothwell
Now that the only users of things in HvCallCfg.h are in HvLpConfig.h, merge in the bit we need and remove HvCallCfg.h. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21[PATCH] ppc64 iSeries: eliminate some unused inline functionsStephen Rothwell
This patch removes from the iSeries header files a large number of inline functions that are not used. It also changes the only caller of a HvCallCfg function that is outside HvLpConfig.h to its equivalent HvLpConfig function and no longer includes HvCallCfg.h where it is not needed. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21[PATCH] ppc64 iSeries: remove LparData.hStephen Rothwell
include/asm-ppc64/iSeries/LparData.h just included a whole lot of other files to declare variables that would be better declared in those other files. So, remove it. This will reduce that number of things needed to be included in most cases to access the relevant variables. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21[PATCH] ppc64 iSeries: obvious code simplificationsStephen Rothwell
This patch does some obvious code cleanups in the iSeries headers files. - simplifies the bodies of lots of inline functions - parenthesises a macros result - removes C++ wrapping - adds "extern" to some function declarations There are no semantic changes. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21[PATCH] ppc64 iSeries: more header file white space cleanupsStephen Rothwell
This patch just contains white space and comment cleanups in the iSeries headers files. There are no semantic changes. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21[PATCH] ppc64 iSeries: header file white space cleanupsStephen Rothwell
This patch just contains white space and comment cleanups in the iSeries headers files. There are no semantic changes. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21[PATCH] ppc64 iSeries: remove iSeries_proc.hStephen Rothwell
include/asm-ppc64/iSeries/iSeries_proc.h just contains a declaration of a function that no longer exists. Remove it. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21[PATCH] ppc64: Abolish ioremap_mmDavid Gibson
Currently ppc64 has two mm_structs for the kernel, init_mm and also ioremap_mm. The latter really isn't necessary: this patch abolishes it, instead restricting vmallocs to the lower 1TB of the init_mm's range and placing io mappings in the upper 1TB. This simplifies the code in a number of places and eliminates an unecessary set of pagetables. It also tweaks the unmap/free path a little, allowing us to remove the unmap_im_area() set of page table walkers, replacing them with unmap_vm_area(). Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21[PATCH] smp_processor_id() cleanupIngo Molnar
This patch implements a number of smp_processor_id() cleanup ideas that Arjan van de Ven and I came up with. The previous __smp_processor_id/_smp_processor_id/smp_processor_id API spaghetti was hard to follow both on the implementational and on the usage side. Some of the complexity arose from picking wrong names, some of the complexity comes from the fact that not all architectures defined __smp_processor_id. In the new code, there are two externally visible symbols: - smp_processor_id(): debug variant. - raw_smp_processor_id(): nondebug variant. Replaces all existing uses of _smp_processor_id() and __smp_processor_id(). Defined by every SMP architecture in include/asm-*/smp.h. There is one new internal symbol, dependent on DEBUG_PREEMPT: - debug_smp_processor_id(): internal debug variant, mapped to smp_processor_id(). Also, i moved debug_smp_processor_id() from lib/kernel_lock.c into a new lib/smp_processor_id.c file. All related comments got updated and/or clarified. I have build/boot tested the following 8 .config combinations on x86: {SMP,UP} x {PREEMPT,!PREEMPT} x {DEBUG_PREEMPT,!DEBUG_PREEMPT} I have also build/boot tested x64 on UP/PREEMPT/DEBUG_PREEMPT. (Other architectures are untested, but should work just fine.) Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-08[PATCH] ppc64: Fix PER_LINUX32 behaviourPaul Mackerras
This patch fixes some bugs in the ppc64 PER_LINUX32 implementation, noted by Juergen Kreileder: * uname(2) doesn't respect PER_LINUX32, it returns 'ppc64' instead of 'ppc' * Child processes of a PER_LINUX32 process don't inherit PER_LINUX32 Along the way I took the opportunity to move things around so that sys_ppc32.c only has 32-bit syscall emulation functions and to remove the obsolete "fakeppc" command line option. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-07[PATCH] AGP fix for Xen VMMKeir Fraser
When Linux is running on the Xen virtual machine monitor, physical addresses are virtualised and cannot be directly referenced by the AGP GART. This patch fixes the GART driver for Xen by adding a layer of abstraction between physical addresses and 'GART addresses'. Architecture-specific functions are also defined for allocating and freeing the GATT. Xen requires this to ensure that table really is contiguous from the point of view of the GART. These extra interface functions are defined as 'no-ops' for all existing architectures that use the GART driver. Signed-off-by: Keir Fraser <keir@xensource.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Dave Jones <davej@redhat.com>
2005-06-02[PATCH] ppc64: cleanup iseries runlight supportAnton Blanchard
The iseries has a bar graph on the front panel that shows how busy it is. The operating system sets and clears a bit in the CTRL register to control it. Instead of going to the complexity of using a thread info bit, just set and clear it in the idle loop. Also create two helper functions, ppc64_runlatch_on and ppc64_runlatch_off. Finally don't use the short form of the SPR defines. Signed-off-by: Anton Blanchard <anton@samba.org> Acked-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-02[PATCH] ppc64: cleanup SPR definitionsAnton Blanchard
There are a bunch of irrelevant SPR definitions in asm/processer.h. Cut them down a bit, also add a DABR_TRANSLATION define which will be used shortly. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-01[PATCH] ppc32/ppc64: cleanup /proc/device-treeBenjamin Herrenschmidt
This cleans up the /proc/device-tree representation of the Open Firmware device-tree on ppc and ppc64. It does the following things: - Workaround an issue in some Apple device-trees where a property may exist with the same name as a child node of the parent. We now simply "drop" the property instead of creating duplicate entries in /proc with random result... - Do not try to chop off the "@0" at the end of a node name whose unit address is 0. This is not useful, inconsistent, and the code was buggy and didn't always work anyway. - Do not create symlinks for the short name and unit address parts of a node. These were never really used, bloated the memory footprint of the device-tree with useless struct proc_dir_entry and their matching dentry and inode cache bloat. This results in smaller code, smaller memory footprint, and a more accurate view of the tree presented to userland. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-25[PATCH] ppc64 iSeries: fix boot time settingStephen Rothwell
For quite a while, there has existed a hypervisor bug on legacy iSeries which means that we do not get the boot time set in the kernel. This patch works around that bug. This was most noticable when the root partition needed to be checked at every boot as the kernel thought it was some time in 1905 until user mode reset the time correctly. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-06[PATCH] ppc64: global interrupt queue cleanupPaul Mackerras
Move the code to set global interrupt queue membership to xics.c, and remove no longer needed extern declarations. Also call it on all cpus (even the boot cpu) to prepare for kexec. Signed-off-by: Milton Miller <miltonm@bga.com> Signed-off-by: R Sharada <sharada@in.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-05[PATCH] ppc64: pgtable.h and other header cleanupsDavid Gibson
This patch started as simply removing a few never-used macros from asm-ppc64/pgtable.h, then kind of grew. It now makes a bunch of cleanups to the ppc64 low-level header files (with corresponding changes to .c files where necessary) such as: - Abolishing never-used macros - Eliminating multiple #defines with the same purpose - Removing pointless macros (cases where just expanding the macro everywhere turns out clearer and more sensible) - Removing some cases where macros which could be defined in terms of each other weren't - Moving imalloc() related definitions from pgtable.h to their own header file (imalloc.h) - Re-arranging headers to group things more logically - Moving all VSID allocation related things to mmu.h, instead of being split between mmu.h and mmu_context.h - Removing some reserved space for flags from the PMD - we're not using it. - Fix some bugs which broke compile with STRICT_MM_TYPECHECKS. Signed-off-by: David Gibson <dwg@au1.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-04[PATCH] asm/signal.h unificationAl Viro
New file - asm-generic/signal.h. Contains declarations of __sighandler_t, __sigrestore_t, SIG_DFL, SIG_IGN, SIG_ERR and default definitions of SIG_BLOCK, SIG_UNBLOCK and SIG_SETMASK. asm-*/signal.h switched to including it. The only exception is asm-parisc/signal.h that wants its own declaration of __sighandler_t; that one is left as-is. asm-ppc64/signal.h required one more thing - unlike everybody else it used __sigrestorer_t instead of usual __sigrestore_t. PPC64 switched to common spelling. Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-01[PATCH] move SA_xxx defines to linux/signal.hStas Sergeev
The attached patch moves the IRQ-related SA_xxx flags (namely, SA_PROBE, SA_SAMPLE_RANDOM and SA_SHIRQ) from all the arch-specific headers to linux/signal.h. This looks like a left-over after the irq-handling code was consolidated. The code was moved to kernel/irq/*, but the flags are still left per-arch. Right now, adding a new IRQ flag to the arch-specific header, like this patch does: http://cvs.sourceforge.net/viewcvs.py/*checkout*/alsa/alsa-driver/utils/patches/pcsp-kernel-2.6.10-03.diff?rev=1.1 no longer works, it breaks the compilation for all other arches, unless you add that flag to all the other arch-specific headers too. So I think such a clean-up makes sense. Signed-off-by: Stas Sergeev <stsp@aknet.ru> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-01[PATCH] remove all kernel BUGsMatt Mackall
This patch eliminates all kernel BUGs, trims about 35k off the typical kernel, and makes the system slightly faster. Signed-off-by: Matt Mackall <mpm@selenic.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-01[PATCH] ppc64: reverse prediction on spinlock busy loop codeJake Moilanen
On our raw spinlocks, we currently have an attempt at the lock, and if we do not get it we enter a spin loop. This spinloop will likely continue for awhile, and we pridict likely. Shouldn't we predict that we will get out of the loop so our next instructions are already prefetched. Even when we miss because the lock is still held, it won't matter since we are waiting anyways. I did a couple quick benchmarks, but the results are inconclusive. 16-way 690 running specjbb with original code # ./specjbb 3000 16 1 1 19 30 120 ... Valid run, Score is 59282 16-way 690 running specjbb with unlikely code # ./specjbb 3000 16 1 1 19 30 120 ... Valid run, Score is 59541 I saw a smaller increase on a JS20 (~1.6%) JS20 specjbb w/ original code # ./specjbb 400 2 1 1 19 30 120 ... Valid run, Score is 20460 JS20 specjbb w/ unlikely code # ./specjbb 400 2 1 1 19 30 120 ... Valid run, Score is 20803 Anton said: Mispredicting the spinlock busy loop also means we slow down the rate at which we do the loads which can be good for heavily contended locks. Note: There are some gcc issues with our default build and branch prediction, but a CONFIG_POWER4_ONLY build should emit them correctly. I'm working with Alan Modra on it now. Signed-off-by: Jake Moilanen <moilanen@austin.ibm.com> Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-01[PATCH] ppc64: remove unnecessary includeAnton Blanchard
We no longer use any ppcdebug stuff in a.out.h, so remove the define. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-01[PATCH] ppc64: noexec fixesAnton Blanchard
There were a few issues with the ppc64 noexec support: The 64bit ABI has a non executable stack by default. At the moment 64bit apps require a PT_GNU_STACK section in order to have a non executable stack. Disable the read implies exec workaround on the 64bit ABI. The 64bit toolchain has never had problems with incorrect mmap permissions (the 32bit has, thats why we need to retain the workaround). With these fixes as well as a gcc fix from Alan Modra (that was recently committed) 64bit apps work as expected. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-01[PATCH] ppc64: update to use the new 4L headersBenjamin Herrenschmidt
This patch converts ppc64 to use the generic pgtable-nopud.h instead of the "fixup" header. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-19[PATCH] freepgt: arch FIRST_USER_ADDRESS 0Hugh Dickins
Replace misleading definition of FIRST_USER_PGD_NR 0 by definition of FIRST_USER_ADDRESS 0 in all the MMU architectures beyond arm and arm26. Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-19[PATCH] freepgt: hugetlb_free_pgd_rangeHugh Dickins
ia64 and ppc64 had hugetlb_free_pgtables functions which were no longer being called, and it wasn't obvious what to do about them. The ppc64 case turns out to be easy: the associated tables are noted elsewhere and freed later, safe to either skip its hugetlb areas or go through the motions of freeing nothing. Since ia64 does need a special case, restore to ppc64 the special case of skipping them. The ia64 hugetlb case has been broken since pgd_addr_end went in, though it probably appeared to work okay if you just had one such area; in fact it's been broken much longer if you consider a long munmap spanning from another region into the hugetlb region. In the ia64 hugetlb region, more virtual address bits are available than in the other regions, yet the page tables are structured the same way: the page at the bottom is larger. Here we need to scale down each addr before passing it to the standard free_pgd_range. Was about to write a hugely_scaled_down macro, but found htlbpage_to_page already exists for just this purpose. Fixed off-by-one in ia64 is_hugepage_only_range. Uninline free_pgd_range to make it available to ia64. Make sure the vma-gathering loop in free_pgtables cannot join a hugepage_only_range to any other (safe to join huges? probably but don't bother). Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-19[PATCH] freepgt: remove MM_VM_SIZE(mm)Hugh Dickins
There's only one usage of MM_VM_SIZE(mm) left, and it's a troublesome macro because mm doesn't contain the (32-bit emulation?) info needed. But it too is only needed because we ignore the end from the vma list. We could make flush_pgtables return that end, or unmap_vmas. Choose the latter, since it's a natural fit with unmap_mapping_range_vma needing to know its restart addr. This does make more than minimal change, but if unmap_vmas had returned the end before, this is how we'd have done it, rather than storing the break_addr in zap_details. unmap_vmas used to return count of vmas scanned, but that's just debug which hasn't been useful in a while; and if we want the map_count 0 on exit check back, it can easily come from the final remove_vm_struct loop. Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-16[PATCH] ppc64: no prefetch for NULL pointersOlof Johansson
For prefetches of NULL (as when walking a short linked list), PPC64 will in some cases take a performance hit. The hardware needs to do the TLB walk, and said walk will always miss, which means (up to) two L2 misses as penalty. This seems to hurt overall performance, so for NULL pointers skip the prefetch alltogether. Signed-off-by: Olof Johansson <olof@austin.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-16[PATCH] ppc64: Improve mapping of vDSOBenjamin Herrenschmidt
This patch reworks the way the ppc64 is mapped in user memory by the kernel to make it more robust against possible collisions with executable segments. Instead of just whacking a VMA at 1Mb, I now use get_unmapped_area() with a hint, and I moved the mapping of the vDSO to after the mapping of the various ELF segments and of the interpreter, so that conflicts get caught properly (it still has to be before create_elf_tables since the later will fill the AT_SYSINFO_EHDR with the proper address). While I was at it, I also changed the 32 and 64 bits vDSO's to link at their "natural" address of 1Mb instead of 0. This is the address where they are normally mapped in absence of conflict. By doing so, it should be possible to properly prelink one it's been verified to work on glibc. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-16Linux-2.6.12-rc2Linus Torvalds
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!