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* Generic semaphore implementationMatthew Wilcox2008-04-173-261/+1
| | | | | | | | | | | Semaphores are no longer performance-critical, so a generic C implementation is better for maintainability, debuggability and extensibility. Thanks to Peter Zijlstra for fixing the lockdep warning. Thanks to Harvey Harrison for pointing out that the unlikely() was unnecessary. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Acked-by: Ingo Molnar <mingo@elte.hu>
* [SPARC]: Fix several regset and ptrace bugs.David S. Miller2008-04-091-51/+97
| | | | | | | | | | | | | | | | | 1) ptrace should pass 'current' to task_user_regset_view() 2) When fetching general registers using a 64-bit view, and the target is 32-bit, we have to convert. 3) Skip the whole register window get/set code block if the user isn't asking to access anything in there. Otherwise we have problems if the user doesn't have an address space setup. Fetching ptrace register is still valid at such a time, and ptrace does not try to access the register window area of the regset. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Fix user accesses in regset code.David S. Miller2008-04-031-21/+115
| | | | | | | | If target is not current we need to use access_process_vm(). Noticed by Roland McGrath. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Fix FPU saving in 64-bit signal handling.David S. Miller2008-04-031-1/+1
| | | | | | | | | The calculation of the FPU reg save area pointer was wrong. Based upon an OOPS report from Tom Callaway. Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: remove unused calc_npages() in iommu_common.hFUJITA Tomonori2008-03-281-13/+0
| | | | | | Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: add the segment boundary checking to IOMMUs while merging SG entriesFUJITA Tomonori2008-03-283-4/+33
| | | | | | | | | | | | | | | | | | | | Some IOMMUs allocate memory areas spanning LLD's segment boundary limit. It forces low level drivers to have a workaround to adjust scatter lists that the IOMMU builds. We are in the process of making all the IOMMUs respect the segment boundary limits to remove such work around in LLDs. SPARC64 IOMMUs were rewritten to use the IOMMU helper functions and the commit 89c94f2f70d093f59b55d3ea8042d13889169346 made the IOMMUs not allocate memory areas spanning the segment boundary limit. However, SPARC64 IOMMUs allocate memory areas first then try to merge them (while some IOMMUs walk through all the sg entries to see how they can be merged first and allocate memory areas). So SPARC64 IOMMUs also need the boundary limit checking when they try to merge sg entries. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Don't open-code {get,put}_cpu_var() in flush_tlb_pending().David S. Miller2008-03-281-5/+2
| | | | | | Noticed by Andrew Morton. Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds2008-03-2617-120/+382
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: [SPARC64]: Define TASK_SIZE_OF() [SPARC64]: flush_ptrace_access() needs preemption disable. [SPARC64]: Update defconfig. [SPARC64]: Fix allnoconfig build, ptrace.c missing CONFIG_COMPAT checks. [SPARC64]: Fix __get_cpu_var in preemption-enabled area. [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/signal.c [SPARC64]: Fix most sparse warnings in arch/sparc64/kernel/sys_sparc.c [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/time.c [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/ptrace.c [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/irq.c [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/iommu.c [SPARC64]: Fix sparse errors in arch/sparc64/kernel/traps.c [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/{cpu,setup}.c [SPARC64]: Adjust {TLBTEMP,TSBMAP}_BASE. [SPARC64]: Make save_stack_trace() more efficient.
| * [SPARC64]: flush_ptrace_access() needs preemption disable.David S. Miller2008-03-261-0/+4
| | | | | | | | | | | | Based upon a report by Mariusz Kozlowski. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Update defconfig.David S. Miller2008-03-261-4/+8
| | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix allnoconfig build, ptrace.c missing CONFIG_COMPAT checks.David S. Miller2008-03-261-0/+6
| | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix __get_cpu_var in preemption-enabled area.David S. Miller2008-03-261-1/+2
| | | | | | | | | | | | Reported by Mariusz Kozlowski. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/signal.cDavid S. Miller2008-03-263-0/+16
| | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix most sparse warnings in arch/sparc64/kernel/sys_sparc.cDavid S. Miller2008-03-263-5/+56
| | | | | | | | | | | | | | | | | | Sparse still doesn't like the funny cast we make from a scalar to a "union semun" (which is correct by the C language and in particular works with the sparc64 calling conventions, but sparse doesn't grok that yet). Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/time.cDavid S. Miller2008-03-263-27/+44
| | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/ptrace.cDavid S. Miller2008-03-262-3/+13
| | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/irq.cDavid S. Miller2008-03-262-19/+29
| | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/iommu.cDavid S. Miller2008-03-261-4/+4
| | | | | | | | | | | | | | | | Fix local variable shadowing in dma_4u_map_sg(). Mark sun4u_dma_ops static. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix sparse errors in arch/sparc64/kernel/traps.cDavid S. Miller2008-03-263-50/+144
| | | | | | | | | | | | | | | | | | | | | | | | | | Add 'UL' markers to DCU_* macros. Declare C functions called from assembler in entry.h Declare C functions called from within the sparc64 arch code in include/asm-sparc64/*.h headers as appropriate. Remove unused routines in traps.c Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/{cpu,setup}.cDavid S. Miller2008-03-254-7/+24
| | | | | | | | | | | | | | | | | | We create a local header file entry.h, under arch/sparc64/kernel/, that we can use to declare routines either defined in assembler or only invoked from assembler. As well as other data objects which are private to the inner sparc64 kernel arch code. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Make save_stack_trace() more efficient.David S. Miller2008-03-242-1/+33
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Doing a 'flushw' every stack trace capture creates so much overhead that it makes lockdep next to unusable. We only care about the frame pointer chain and the function caller program counters, so flush those by hand to the stack frame. This is significantly more efficient than a 'flushw' because: 1) We only save 16 bytes per active register window to the stack. 2) This doesn't push the entire register window context of the current call chain out of the cpu, forcing register window fill traps as we return back down. Note that we can't use 'restore' and 'save' instructions to move around the register windows because that wouldn't work on Niagara processors. They optimize 'save' into a new register window by simply clearing out the registers instead of pulling them in from the on-chip register window backing store. Based upon a report by Tom Callaway. Signed-off-by: David S. Miller <davem@davemloft.net>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds2008-03-247-166/+94
|\| | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: [SPARC64]: exec PT_DTRACE [SPARC64]: Use shorter list_splice_init() for brevity. [SPARC64]: Remove most limitations to kernel image size.
| * [SPARC64]: exec PT_DTRACERoland McGrath2008-03-232-6/+0
| | | | | | | | | | | | | | | | The PT_DTRACE flag is meaningless and obsolete. Don't touch it. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Use shorter list_splice_init() for brevity.Robert P. J. Day2008-03-231-2/+1
| | | | | | | | | | Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Remove most limitations to kernel image size.David S. Miller2008-03-214-158/+93
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently kernel images are limited to 8MB in size, and this causes problems especially when enabling features that take up a lot of kernel image space such as lockdep. The code now will align the kernel image size up to 4MB and map that many locked TLB entries. So, the only practical limitation is the number of available locked TLB entries which is 16 on Cheetah and 64 on pre-Cheetah sparc64 cpus. Niagara cpus don't actually have hw locked TLB entry support. Rather, the hypervisor transparently provides support for "locked" TLB entries since it runs with physical addressing and does the initial TLB miss processing. Fully utilizing this change requires some help from SILO, a patch for which will be submitted to the maintainer. Essentially, SILO will only currently map up to 8MB for the kernel image and that needs to be increased. Note that neither this patch nor the SILO bits will help with network booting. The openfirmware code will only map up to a certain amount of kernel image during a network boot and there isn't much we can to about that other than to implemented a layered network booting facility. Solaris has this, and calls it "wanboot" and we may implement something similar at some point. Signed-off-by: David S. Miller <davem@davemloft.net>
* | Merge branch 'master' of ↵David S. Miller2008-03-179-26/+18
|\ \ | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
| * | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds2008-03-044-6/+4
| |\| | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: [SPARC]: Fix link errors with gcc-4.3 sparc64: replace remaining __FUNCTION__ occurances sparc: replace remaining __FUNCTION__ occurances [SPARC]: Add reboot_command[] extern decl to asm/system.h [SPARC]: Mark linux_sparc_{fpu,chips} static.
| | * sparc64: replace remaining __FUNCTION__ occurancesHarvey Harrison2008-03-032-2/+2
| | | | | | | | | | | | | | | | | | | | | __FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| | * [SPARC]: Add reboot_command[] extern decl to asm/system.hDavid S. Miller2008-02-281-2/+0
| | | | | | | | | | | | | | | | | | Kill off some sparse warnings. Signed-off-by: David S. Miller <davem@davemloft.net>
| | * [SPARC]: Mark linux_sparc_{fpu,chips} static.David S. Miller2008-02-281-2/+2
| | | | | | | | | | | | | | | | | | Caught by sparse. Signed-off-by: David S. Miller <davem@davemloft.net>
| * | Kprobes: indicate kretprobe support in KconfigAnanth N Mavinakayanahalli2008-03-041-0/+1
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add CONFIG_HAVE_KRETPROBES to the arch/<arch>/Kconfig file for relevant architectures with kprobes support. This facilitates easy handling of in-kernel modules (like samples/kprobes/kretprobe_example.c) that depend on kretprobes being present in the kernel. Thanks to Sam Ravnborg for helping make the patch more lean. Per Mathieu's suggestion, added CONFIG_KRETPROBES and fixed up dependencies. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Acked-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * [SPARC64]: Adjust kernel PC validation test in fault handler.David S. Miller2008-02-281-1/+1
| | | | | | | | | | | | | | | | | | | | Because of the new futex validation init handler, we have to accept faults in init section text as well as the normal kernel text. Thanks to Tom Callaway for the bug report. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Loosen checks in exception table handling.David S. Miller2008-02-261-10/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some parts of the kernel now do things like do *_user() accesses while set_fs(KERNEL_DS) that fault on purpose. See, for example, the code added by changeset a0c1e9073ef7428a14309cba010633a6cd6719ea ("futex: runtime enable pi and robust functionality"). That trips up the ASI sanity checking we make in do_kernel_fault(). Just remove it for now. Maybe we can add it back later with an added conditional which looks at the current get_fs() value. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix section mismatch from kernel_map_rangeSam Ravnborg2008-02-241-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix following warnings: WARNING: vmlinux.o(.text+0x4f980): Section mismatch in reference from the function kernel_map_range() to the function .init.text:__alloc_bootmem() WARNING: vmlinux.o(.text+0x4f9cc): Section mismatch in reference from the function kernel_map_range() to the function .init.text:__alloc_bootmem() alloc_bootmem() is only used during early init and for any subsequent call to kernel_map_range() the program logic avoid the call. So annotate kernel_map_range() with __ref to tell modpost to ignore the reference to a __init function. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix section mismatchs from dr_cpu_dataSam Ravnborg2008-02-242-8/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix following warnings: WARNING: vmlinux.o(.text+0x4b258): Section mismatch in reference from the function dr_cpu_data() to the function .devinit.text:mdesc_fill_in_cpu_data() WARNING: vmlinux.o(.text+0x4b290): Section mismatch in reference from the function dr_cpu_data() to the function .cpuinit.text:cpu_up() mdesc_fill_in_cpu_data() is only used during early init and for cpu hotplug so the __cpuinit annotation is the correct choice. We have the call chain: dr_cpu_data() => dr_cpu_configure() => mdesc_fill_in_cpu_data() dr_cpu_data() is used only during early init and for cpu hotplug. So annotating them all __cpuinit solves the section mismatch and should be correct. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | [NET] endianness noise: INADDR_ANYAl Viro2008-03-171-1/+1
|/ | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds2008-02-238-84/+13
|\ | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: [SPARC64]: make IOMMU code respect the segment boundary limits [SPARC64]: Fix cpu trampoline et al. mismatch warnings. [SPARC64]: More sparse warning fixes in process.c [SPARC64]: Fix sparse warning wrt. fault_in_user_windows. [SPARC64]: Kill show_regs32(). [SPARC64]: Fix sparse warnings wrt. __show_regs(). [SPARC64]: Kill show_stackframe{,32}(). [SPARC64]: Fix sparse warnings wrt. machine_alt_power_off().
| * [SPARC64]: make IOMMU code respect the segment boundary limitsFUJITA Tomonori2008-02-201-1/+2
| | | | | | | | | | Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix cpu trampoline et al. mismatch warnings.Sam Ravnborg2008-02-203-3/+7
| | | | | | | | | | Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: More sparse warning fixes in process.cDavid S. Miller2008-02-191-0/+2
| | | | | | | | | | | | | | | | arch/sparc64/kernel/process.c:504:17: warning: symbol 'sparc_do_fork' was not declared. Should it be static? arch/sparc64/kernel/process.c:655:5: warning: symbol 'dump_fpu' was not declared. Should it be static? arch/sparc64/kernel/process.c:708:16: warning: symbol 'sparc_execve' was not declared. Should it be static? Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Kill show_regs32().David S. Miller2008-02-191-18/+0
| | | | | | | | | | | | Unused, noticed via sparse. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix sparse warnings wrt. __show_regs().David S. Miller2008-02-192-4/+0
| | | | | | | | | | | | arch/sparc64/kernel/process.c:219:6: warning: symbol '__show_regs' was not declared. Should it be static? Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Kill show_stackframe{,32}().David S. Miller2008-02-191-56/+0
| | | | | | | | | | | | | | | | | | | | | | Noticed via sparse: arch/sparc64/kernel/process.c:215:6: warning: symbol 'show_stackframe' was not declared. Should it be static? arch/sparc64/kernel/process.c:243:6: warning: symbol 'show_stackframe32' was not declared. Should it be static? It is totally unused. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix sparse warnings wrt. machine_alt_power_off().David S. Miller2008-02-192-2/+2
| | | | | | | | | | | | arch/sparc64/kernel/process.c:123:6: warning: symbol 'machine_alt_power_off' was not declared. Should it be static? Signed-off-by: David S. Miller <davem@davemloft.net>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds2008-02-1912-165/+41
|\| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: [SPARC64]: Add regs_return_value(). [SPARC64]: Kill pcic_present(). [SPARC]: Kill 'prom_palette'. [ATYFB]: Kill 'prom_palette' sparc code. [SPARC64]: Kill 'prom_keyboard'. [SPARC]: Kill extern decl of 'panic_setup'. [SPARC64]: Delete 'boot_flags'. [SPARC64]: Kill unused function 'kernel_enter_debugger'. [SPARC64] arch/sparc64/kernel/unaligned.c: Use time_* macros [SPARC64]: Always register a PROM based early console. [SPARC64]: Update defconfig. [SPARC64]: Add -mtune=ultrasparc3 if possible. [SPARC64]: Remove Makefile code for ancient gcc and binutils. [SPARC64]: Remove DEBUG_BOOTMEM. [SPARC64]: Use shorter "get_zeroed_page" call. [SPARC]: Use shorter form of "get_zeroed_page". [SPARC]: video/cg14.c and video/sbuslib.c build fixes
| * [SPARC64]: Kill pcic_present().David S. Miller2008-02-181-21/+0
| | | | | | | | | | | | | | | | | | | | And also it's helper function pci_is_controller(). Both are unused. I can't remove the equivalent from sparc32 yet as some ancient bus probing code still uses that platform's version. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC]: Kill 'prom_palette'.David S. Miller2008-02-184-22/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The idea of this thing is we could save/restore the firmware's palette when breaking in and out of the firmware prompt. Only one driver implemented this (atyfb) and it's value is questionable. If you're just debugging you don't really care that the characters end up being purple or whatever. And we can provide better debugging and firmware command facilities with minimal in-kernel console I/O drivers. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Kill 'prom_keyboard'.David S. Miller2008-02-182-8/+0
| | | | | | | | | | | | Nothing ever sets it, so it just takes up space. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC]: Kill extern decl of 'panic_setup'.David S. Miller2008-02-181-2/+0
| | | | | | | | | | | | This was made static in kernel/panic.c a long time ago. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Delete 'boot_flags'.David S. Miller2008-02-181-5/+0
| | | | | | | | | | | | It is write-only, nothing tests it's value. Signed-off-by: David S. Miller <davem@davemloft.net>
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