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* [SPARC64]: Fix fault handling in unaligned trap handler.David S. Miller2005-09-28
| | | | | | | | | | | | We were not calling kernel_mna_trap_fault() correctly. Instead of being fancy, just return 0 vs. -EFAULT from the assembler stubs, and handle that return value as appropriate. Create an "__retl_efault" stub for assembler exception table entries and use it where possible. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Convert to use generic exception table support.David S. Miller2005-09-28
| | | | | | | | | | | The funny "range" exception table entries we had were only used by the compat layer socketcall assembly, and it wasn't even needed there. For free we now get proper exception table sorting and fast binary searching. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Fix bug in unaligned load endianness swappingDavid S. Miller2005-09-28
| | | | | | | The in-memory value was being swapped, not the value we loaded into the register. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Add missing IDs for newer cpus.David S. Miller2005-09-28
| | | | | | | | Also, the us3_cpufreq driver can work on Ultra-IV and IV+. They use the SAFARI bus register to control the clock divider just like Ultra-III and III+ do. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Probe D/I/E-cache config and use.David S. Miller2005-09-26
| | | | | | | | | | | | | | | | | | At boot time, determine the D-cache, I-cache and E-cache size and line-size. Use them in cache flushes when appropriate. This change was motivated by discovering that the D-cache on UltraSparc-IIIi and later are 64K not 32K, and the flushes done by the Cheetah error handlers were assuming a 32K size. There are still some pieces of code that are hard coding things and will need to be fixed up at some point. While we're here, fix the D-cache and I-cache parity error handlers to run with interrupts disabled, and when the trap occurs at trap level > 1 log the event via a counter displayed in /proc/cpuinfo. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Add CONFIG_DEBUG_PAGEALLOC support.David S. Miller2005-09-25
| | | | | | | | | | | | | | | | | | | | | | The trick is that we do the kernel linear mapping TLB miss starting with an instruction sequence like this: ba,pt %xcc, kvmap_load xor %g2, %g4, %g5 succeeded by an instruction sequence which performs a full page table walk starting at swapper_pg_dir. We first take over the trap table from the firmware. Then, using this constant PTE generation for the linear mapping area above, we build the kernel page tables for the linear mapping. After this is setup, we patch that branch above into a "nop", which will cause TLB misses to fall through to the full page table walk. With this, the page unmapping for CONFIG_DEBUG_PAGEALLOC is trivial. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Fix mask formation in tomatillo_wsync_handler()David S. Miller2005-09-25
| | | | | | "1" needs to be "1UL", this is a 64-bit mask we're creating. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Kill unused variable in setup_arch()David S. Miller2005-09-23
| | | | | | 'highest_paddr' is set, but never actually used. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Fix comment typo in head.SDavid S. Miller2005-09-22
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Rewrite bootup sequence.David S. Miller2005-09-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Instead of all of this cpu-specific code to remap the kernel to the correct location, use portable firmware calls to do this instead. What we do now is the following in position independant assembler: chosen_node = prom_finddevice("/chosen"); prom_mmu_ihandle_cache = prom_getint(chosen_node, "mmu"); vaddr = 4MB_ALIGN(current_text_addr()); prom_translate(vaddr, &paddr_high, &paddr_low, &mode); prom_boot_mapping_mode = mode; prom_boot_mapping_phys_high = paddr_high; prom_boot_mapping_phys_low = paddr_low; prom_map(-1, 8 * 1024 * 1024, KERNBASE, paddr_low); and that replaces the massive amount of by-hand TLB probing and programming we used to do here. The new code should also handle properly the case where the kernel is mapped at the correct address already (think: future kexec support). Consequently, the bulk of remap_kernel() dies as does the entirety of arch/sparc64/prom/map.S We try to share some strings in the PROM library with the ones used at bootup, and while we're here mark input strings to oplib.h routines with "const" when appropriate. There are many more simplifications now possible. For one thing, we can consolidate the two copies we now have of a lot of cpu setup code sitting in head.S and trampoline.S. This is a significant step towards CONFIG_DEBUG_PAGEALLOC support. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Remove ktlb.S instruction patching.David S. Miller2005-09-22
| | | | | | | | | | | | | | This was kind of ugly, and actually buggy. The bug was that we didn't handle a machine with memory starting > 4GB. If the 'prompmd' was allocated in physical memory > 4GB we'd croak because the obp_iaddr_patch and obp_daddr_patch things only supported a 32-bit physical address. So fix this by just loading the appropriate values from two variables in the kernel image, which is locked into the TLB and thus accesses to them can't cause a recursive TLB miss. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Kill SZ_BITS define from dtlb_backend.SDavid S. Miller2005-09-21
| | | | | | | This is just a replica of the existing _PAGE_SZBITS, and thus unnecessary. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Move kernel TLB miss handling into a seperate file.David S. Miller2005-09-21
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Verify vmalloc TLB misses more strictly.David S. Miller2005-09-20
| | | | | | | Arrange the modules, OBP, and vmalloc areas such that a range verification can be done quite minimally. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Move DCACHE_ALIASING_POSSIBLE define to asm/page.hDavid S. Miller2005-09-19
| | | | | | | | This showed that arch/sparc64/kernel/ptrace.c was not getting the define properly, and thus the code protected by this ifdef was never actually compiled before. So fix that too. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Handle little-endian unaligned loads/stores correctly.David S. Miller2005-09-19
| | | | | | | | | | | | | | | | | Because we use byte loads/stores to cons up the value in and out of registers, we can't expect the ASI endianness setting to take care of this for us. So do it by hand. This case is triggered by drivers/block/aoe/aoecmd.c in the ataid_complete() function where it goes: /* word 100: number lba48 sectors */ ssize = le64_to_cpup((__le64 *) &id[100<<1]); This &id[100<<1] address is 4 byte, rather than 8 byte aligned, thus triggering the unaligned exception. Signed-off-by: David S. Miller <davem@davemloft.net>
* [LIB]: Consolidate _atomic_dec_and_lock()David S. Miller2005-09-15
| | | | | | | | | | | | Several implementations were essentialy a common piece of C code using the cmpxchg() macro. Put the implementation in one spot that everyone can share, and convert sparc64 over to using this. Alpha is the lone arch-specific implementation, which codes up a special fast path for the common case in order to avoid GP reloading which a pure C version would require. Signed-off-by: David S. Miller <davem@davemloft.net>
* [PATCH] spinlock consolidationIngo Molnar2005-09-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch (written by me and also containing many suggestions of Arjan van de Ven) does a major cleanup of the spinlock code. It does the following things: - consolidates and enhances the spinlock/rwlock debugging code - simplifies the asm/spinlock.h files - encapsulates the raw spinlock type and moves generic spinlock features (such as ->break_lock) into the generic code. - cleans up the spinlock code hierarchy to get rid of the spaghetti. Most notably there's now only a single variant of the debugging code, located in lib/spinlock_debug.c. (previously we had one SMP debugging variant per architecture, plus a separate generic one for UP builds) Also, i've enhanced the rwlock debugging facility, it will now track write-owners. There is new spinlock-owner/CPU-tracking on SMP builds too. All locks have lockup detection now, which will work for both soft and hard spin/rwlock lockups. The arch-level include files now only contain the minimally necessary subset of the spinlock code - all the rest that can be generalized now lives in the generic headers: include/asm-i386/spinlock_types.h | 16 include/asm-x86_64/spinlock_types.h | 16 I have also split up the various spinlock variants into separate files, making it easier to see which does what. The new layout is: SMP | UP ----------------------------|----------------------------------- asm/spinlock_types_smp.h | linux/spinlock_types_up.h linux/spinlock_types.h | linux/spinlock_types.h asm/spinlock_smp.h | linux/spinlock_up.h linux/spinlock_api_smp.h | linux/spinlock_api_up.h linux/spinlock.h | linux/spinlock.h /* * here's the role of the various spinlock/rwlock related include files: * * on SMP builds: * * asm/spinlock_types.h: contains the raw_spinlock_t/raw_rwlock_t and the * initializers * * linux/spinlock_types.h: * defines the generic type and initializers * * asm/spinlock.h: contains the __raw_spin_*()/etc. lowlevel * implementations, mostly inline assembly code * * (also included on UP-debug builds:) * * linux/spinlock_api_smp.h: * contains the prototypes for the _spin_*() APIs. * * linux/spinlock.h: builds the final spin_*() APIs. * * on UP builds: * * linux/spinlock_type_up.h: * contains the generic, simplified UP spinlock type. * (which is an empty structure on non-debug builds) * * linux/spinlock_types.h: * defines the generic type and initializers * * linux/spinlock_up.h: * contains the __raw_spin_*()/etc. version of UP * builds. (which are NOPs on non-debug, non-preempt * builds) * * (included on UP-non-debug builds:) * * linux/spinlock_api_up.h: * builds the _spin_*() APIs. * * linux/spinlock.h: builds the final spin_*() APIs. */ All SMP and UP architectures are converted by this patch. arm, i386, ia64, ppc, ppc64, s390/s390x, x64 was build-tested via crosscompilers. m32r, mips, sh, sparc, have not been tested yet, but should be mostly fine. From: Grant Grundler <grundler@parisc-linux.org> Booted and lightly tested on a500-44 (64-bit, SMP kernel, dual CPU). Builds 32-bit SMP kernel (not booted or tested). I did not try to build non-SMP kernels. That should be trivial to fix up later if necessary. I converted bit ops atomic_hash lock to raw_spinlock_t. Doing so avoids some ugly nesting of linux/*.h and asm/*.h files. Those particular locks are well tested and contained entirely inside arch specific code. I do NOT expect any new issues to arise with them. If someone does ever need to use debug/metrics with them, then they will need to unravel this hairball between spinlocks, atomic ops, and bit ops that exist only because parisc has exactly one atomic instruction: LDCW (load and clear word). From: "Luck, Tony" <tony.luck@intel.com> ia64 fix Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjanv@infradead.org> Signed-off-by: Grant Grundler <grundler@parisc-linux.org> Cc: Matthew Wilcox <willy@debian.org> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Mikael Pettersson <mikpe@csd.uu.se> Signed-off-by: Benoit Boissinot <benoit.boissinot@ens-lyon.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge master.kernel.org:/pub/scm/linux/kernel/git/sam/kbuild Linus Torvalds2005-09-09
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| * kbuild: frv,m32r,sparc64 introduce fake asm-offsets.h fileSam Ravnborg2005-09-09
| | | | | | | | | | | | | | Needed to get them to build. And a hint to avoid hardcoding to many constants in assembler. Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
* | Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6 Linus Torvalds2005-09-08
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| * | [PATCH] Make sparc64 use setup-res.cDavid S. Miller2005-09-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There were three changes necessary in order to allow sparc64 to use setup-res.c: 1) Sparc64 roots the PCI I/O and MEM address space using parent resources contained in the PCI controller structure. I'm actually surprised no other platforms do this, especially ones like Alpha and PPC{,64}. These resources get linked into the iomem/ioport tree when PCI controllers are probed. So the hierarchy looks like this: iomem --| PCI controller 1 MEM space --| device 1 device 2 etc. PCI controller 2 MEM space --| ... ioport --| PCI controller 1 IO space --| ... PCI controller 2 IO space --| ... You get the idea. The drivers/pci/setup-res.c code allocates using plain iomem_space and ioport_space as the root, so that wouldn't work with the above setup. So I added a pcibios_select_root() that is used to handle this. It uses the PCI controller struct's io_space and mem_space on sparc64, and io{port,mem}_resource on every other platform to keep current behavior. 2) quirk_io_region() is buggy. It takes in raw BUS view addresses and tries to use them as a PCI resource. pci_claim_resource() expects the resource to be fully formed when it gets called. The sparc64 implementation would do the translation but that's absolutely wrong, because if the same resource gets released then re-claimed we'll adjust things twice. So I fixed up quirk_io_region() to do the proper pcibios_bus_to_resource() conversion before passing it on to pci_claim_resource(). 3) I was mistakedly __init'ing the function methods the PCI controller drivers provide on sparc64 to implement some parts of these routines. This was, of course, easy to fix. So we end up with the following, and that nasty SPARC64 makefile ifdef in drivers/pci/Makefile is finally zapped. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | [PATCH] PCI: restore BAR values after D3hot->D0 for devices that need itJohn W. Linville2005-09-08
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some PCI devices (e.g. 3c905B, 3c556B) lose all configuration (including BARs) when transitioning from D3hot->D0. This leaves such a device in an inaccessible state. The patch below causes the BARs to be restored when enabling such a device, so that its driver will be able to access it. The patch also adds pci_restore_bars as a new global symbol, and adds a correpsonding EXPORT_SYMBOL_GPL for that. Some firmware (e.g. Thinkpad T21) leaves devices in D3hot after a (re)boot. Most drivers call pci_enable_device very early, so devices left in D3hot that lose configuration during the D3hot->D0 transition will be inaccessible to their drivers. Drivers could be modified to account for this, but it would be difficult to know which drivers need modification. This is especially true since often many devices are covered by the same driver. It likely would be necessary to replicate code across dozens of drivers. The patch below should trigger only when transitioning from D3hot->D0 (or at boot), and only for devices that have the "no soft reset" bit cleared in the PM control register. I believe it is safe to include this patch as part of the PCI infrastructure. The cleanest implementation of pci_restore_bars was to call pci_update_resource. Unfortunately, that does not currently exist for the sparc64 architecture. The patch below includes a null implemenation of pci_update_resource for sparc64. Some have expressed interest in making general use of the the pci_restore_bars function, so that has been exported to GPL licensed modules. Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* / [SPARC64]: Inline membar()'s again.David S. Miller2005-09-08
|/ | | | | | | | | | | | | | | | | | | | | | | Since GCC has to emit a call and a delay slot to the out-of-line "membar" routines in arch/sparc64/lib/mb.S it is much better to just do the necessary predicted branch inline instead as: ba,pt %xcc, 1f membar #whatever 1: instead of the current: call membar_foo dslot because this way GCC is not required to allocate a stack frame if the function can be a leaf function. This also makes this bug fix easier to backport to 2.4.x Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6 Linus Torvalds2005-09-07
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| * [SPARC64]: Fix set/get MTU cases in sunos_ioctl()David S. Miller2005-09-06
| | | | | | | | | | | | | | Need to use compat struct sizes and compat_sys_ioctl(). Reported by Adrian Bunk via kernel bugzilla #2683 Signed-off-by: David S. Miller <davem@davemloft.net>
* | [PATCH] Kprobes: prevent possible race conditions sparc64 changesPrasanna S Panchamukhi2005-09-07
| | | | | | | | | | | | | | | | | | This patch contains the sparc64 architecture specific changes to prevent the possible race conditions. Signed-off-by: Prasanna S Panchamukhi <prasanna@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] remove duplicated sys_open32() code from 64bit archsMiklos Szeredi2005-09-07
| | | | | | | | | | | | | | | | | | | | | | | | 64 bit architectures all implement their own compatibility sys_open(), when in fact the difference is simply not forcing the O_LARGEFILE flag. So use the a common function instead. Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Cc: <viro@parcelfarce.linux.theplanet.co.uk> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] NTP: ntp-helper functionsjohn stultz2005-09-07
|/ | | | | | | | | | | | | | | | This patch cleans up a commonly repeated set of changes to the NTP state variables by adding two helper inline functions: ntp_clear(): Clears the ntp state variables ntp_synced(): Returns 1 if the system is synced with a time server. This was compile tested for alpha, arm, i386, x86-64, ppc64, s390, sparc, sparc64. Signed-off-by: John Stultz <johnstul@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [SPARC]: Kill io_remap_page_range()David S. Miller2005-09-02
| | | | | | | It's been deprecated long enough and there are no in-tree users any longer. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Do not expand CHEETAH_LOG_ERROR 3 times.David S. Miller2005-08-30
| | | | | | | We only need to expand this thing once, saving some text section space. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Kill BRANCH_IF_ANY_CHEETAH() from copy page.David S. Miller2005-08-30
| | | | | | Just patch the branch at boot time instead. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Eliminate irq_cpustat_t.David S. Miller2005-08-30
| | | | | | | We can put the __softirq_pending mask in the cpudata, no need for the silly NR_CPUS array in kernel/softirq.c Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: More fully work around Spitfire Errata 51.David S. Miller2005-08-29
| | | | | | | | | | | | It appears that a memory barrier soon after a mispredicted branch, not just in the delay slot, can cause the hang condition of this cpu errata. So move them out-of-line, and explicitly put them into a "branch always, predict taken" delay slot which should fully kill this problem. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Make debugging spinlocks usable again.David S. Miller2005-08-29
| | | | | | | | | | | | | When the spinlock routines were moved out of line into kernel/spinlock.c this made it so that the debugging spinlocks record lock acquisition program counts in the kernel/spinlock.c functions not in their callers. This makes the debugging info kind of useless. So record the correct caller's program counter and now this feature is useful once more. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: remove use of asm/segment.hKumar Gala2005-08-29
| | | | | | | | Removed sparc64 architecture specific users of asm/segment.h and asm-sparc64/segment.h itself Signed-off-by: Kumar Gala <kumar.gala@freescale.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Revamp Spitfire error trap handling.David S. Miller2005-08-29
| | | | | | | | | | | | | | | | | | | Current uncorrectable error handling was poor enough that the processor could just loop taking the same trap over and over again. Fix things up so that we at least get a log message and perhaps even some register state. In the process, much consolidation became possible, particularly with the correctable error handler. Prefix assembler and C function names with "spitfire" to indicate that these are for Ultra-I/II/IIi/IIe only. More work is needed to make these routines robust and featureful to the level of the Ultra-III error handlers. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Do not call winfix_dax blindlyDavid S. Miller2005-08-29
| | | | | | | | | Verify we really are taking a data access exception trap, at TL1, from one of the window spill/fill handlers. Else call a new function, data_access_exception_tl1, to log the error. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Fix trap state reading for instruction_access_exception.David S. Miller2005-08-29
| | | | | | | | | | 1) Read ASI_IMMU SFSR not ASI_DMMU. 2) IMMU has no SFAR, read TPC instead 3) Delete old and incorrect comment about the DTLB protection trap having a dependency on the SFSR contents in order to function correctly Signed-off-by: David S. Miller <davem@davemloft.net>
* [PATCH] convert signal handling of NODEFER to act like other Unix boxes.Steven Rostedt2005-08-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It has been reported that the way Linux handles NODEFER for signals is not consistent with the way other Unix boxes handle it. I've written a program to test the behavior of how this flag affects signals and had several reports from people who ran this on various Unix boxes, confirming that Linux seems to be unique on the way this is handled. The way NODEFER affects signals on other Unix boxes is as follows: 1) If NODEFER is set, other signals in sa_mask are still blocked. 2) If NODEFER is set and the signal is in sa_mask, then the signal is still blocked. (Note: this is the behavior of all tested but Linux _and_ NetBSD 2.0 *). The way NODEFER affects signals on Linux: 1) If NODEFER is set, other signals are _not_ blocked regardless of sa_mask (Even NetBSD doesn't do this). 2) If NODEFER is set and the signal is in sa_mask, then the signal being handled is not blocked. The patch converts signal handling in all current Linux architectures to the way most Unix boxes work. Unix boxes that were tested: DU4, AIX 5.2, Irix 6.5, NetBSD 2.0, SFU 3.5 on WinXP, AIX 5.3, Mac OSX, and of course Linux 2.6.13-rcX. * NetBSD was the only other Unix to behave like Linux on point #2. The main concern was brought up by point #1 which even NetBSD isn't like Linux. So with this patch, we leave NetBSD as the lonely one that behaves differently here with #2. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Export pcibios_bus_to_resourceKeith Owens2005-08-24
| | | | | | | | | pcibios_bus_to_resource is exported on all architectures except ia64 and sparc. Add exports for the two missing architectures. Needed when Yenta socket support is compiled as a module. Signed-off-by: Keith Owens <kaos@sgi.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [SPARC64]: Move kernel unaligned trap handlers into assembler file.David S. Miller2005-08-19
| | | | | | | | | | GCC 4.x really dislikes the games we are playing in unaligned.c, and the cleanest way to fix this is to move things into assembler. Noted by Al Viro. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Fix 2 bugs in cpufreq drivers.David S. Miller2005-08-18
| | | | | | | 1) cpufreq wants frequenceis in KHZ not MHZ 2) provide ->get() method so curfreq node is created Signed-off-by: David S. Miller <davem@davemloft.net>
* Revert "[PATCH] PCI: restore BAR values..."Linus Torvalds2005-08-08
| | | | | | | Revert commit fec59a711eef002d4ef9eb8de09dd0a26986eb77, which is breaking sparc64 that doesn't have a working pci_update_resource. We'll re-do this after 2.6.13 when we'll do it all properly.
* [PATCH] PCI: restore BAR values after D3hot->D0 for devices that need itJohn W. Linville2005-08-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some PCI devices (e.g. 3c905B, 3c556B) lose all configuration (including BARs) when transitioning from D3hot->D0. This leaves such a device in an inaccessible state. The patch below causes the BARs to be restored when enabling such a device, so that its driver will be able to access it. The patch also adds pci_restore_bars as a new global symbol, and adds a correpsonding EXPORT_SYMBOL_GPL for that. Some firmware (e.g. Thinkpad T21) leaves devices in D3hot after a (re)boot. Most drivers call pci_enable_device very early, so devices left in D3hot that lose configuration during the D3hot->D0 transition will be inaccessible to their drivers. Drivers could be modified to account for this, but it would be difficult to know which drivers need modification. This is especially true since often many devices are covered by the same driver. It likely would be necessary to replicate code across dozens of drivers. The patch below should trigger only when transitioning from D3hot->D0 (or at boot), and only for devices that have the "no soft reset" bit cleared in the PM control register. I believe it is safe to include this patch as part of the PCI infrastructure. The cleanest implementation of pci_restore_bars was to call pci_update_resource. Unfortunately, that does not currently exist for the sparc64 architecture. The patch below includes a null implemenation of pci_update_resource for sparc64. Some have expressed interest in making general use of the the pci_restore_bars function, so that has been exported to GPL licensed modules. Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [SPARC]: Add inotify syscall entries.David S. Miller2005-07-27
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [PATCH] Don't export machine_restart, machine_halt, or machine_power_off.Eric W. Biederman2005-07-26
| | | | | | | | | | | | machine_restart, machine_halt and machine_power_off are machine specific hooks deep into the reboot logic, that modules have no business messing with. Usually code should be calling kernel_restart, kernel_halt, kernel_power_off, or emergency_restart. So don't export machine_restart, machine_halt, and machine_power_off so we can catch buggy users. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [SPARC64]: Move syscall success and newchild state out of thread flags.David S. Miller2005-07-24
| | | | | | | | | These two bits were accesses non-atomically from assembler code. So, in order to eliminate any potential races resulting from that, move these pieces of state into two bytes elsewhere in struct thread_info. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Privatize sun5_timer.David S. Miller2005-07-24
| | | | | | | It is only used by some localized code in irq.c, and also delete enable_prom_timer() as that is totally unused. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Fix SMP build failure.Andrew Morton2005-07-12
| | | | | | | | arch/sparc64/kernel/smp.c:48: error: parse error before "__attribute__" arch/sparc64/kernel/smp.c:49: error: parse error before "__attribute__" Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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