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* Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds2008-03-26
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 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]: Define TASK_SIZE_OF()David S. Miller2008-03-26
| | | | | | | | | | | | | | | | | | This make "cat /proc/${PID}/pagemap" more efficient for 32-bit tasks. Based upon a report by Mariusz Kozlowski. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/time.cDavid S. Miller2008-03-26
| | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/irq.cDavid S. Miller2008-03-26
| | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix sparse errors in arch/sparc64/kernel/traps.cDavid S. Miller2008-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | 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. Miller2008-03-26
| | | | | | | | | | | | | | | | | | 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]: Adjust {TLBTEMP,TSBMAP}_BASE.David S. Miller2008-03-26
| | | | | | | | | | | | | | | | | | Move them further from the main kernel image area to facilitate larger kernel sizes. Adjust comments to match. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Make save_stack_trace() more efficient.David S. Miller2008-03-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 Torvalds2008-03-24
|\| | | | | | | | | | | | | * 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]: Remove most limitations to kernel image size.David S. Miller2008-03-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds2008-03-21
|\| | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: [SPARC64]: Fix atomic backoff limit.
| * [SPARC64]: Fix atomic backoff limit.David S. Miller2008-03-19
| | | | | | | | | | | | | | | | 4096 will not fit into the immediate field of a compare instruction, in fact it will end up being -4096 causing the check to fail every time and thus disabling backoff. Signed-off-by: David S. Miller <davem@davemloft.net>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds2008-03-04
|\| | | | | | | | | | | | | | | | | * 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.
| * [SPARC]: Add reboot_command[] extern decl to asm/system.hDavid S. Miller2008-02-29
| | | | | | | | | | | | Kill off some sparse warnings. Signed-off-by: David S. Miller <davem@davemloft.net>
* | Kprobes: indicate kretprobe support in KconfigAnanth N Mavinakayanahalli2008-03-04
|/ | | | | | | | | | | | | | | | | 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]: More sparse warning fixes in process.cDavid S. Miller2008-02-20
| | | | | | | | 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]: Fix sparse warning wrt. fault_in_user_windows.David S. Miller2008-02-20
| | | | | | arch/sparc64/kernel/process.c:467:6: warning: symbol 'fault_in_user_windows' was not declared. Should it be static? Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Fix sparse warnings wrt. __show_regs().David S. Miller2008-02-19
| | | | | | 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]: Fix sparse warnings wrt. machine_alt_power_off().David S. Miller2008-02-19
| | | | | | 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>
* [SPARC64]: Add regs_return_value().David S. Miller2008-02-19
| | | | | | | | Needed for kretprobes. Noticed by Ananth N Mavinakayanahalli. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC]: Merge asm-sparc{,64}/a.out.hDavid S. Miller2008-02-10
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC]: Merge asm-sparc{,64}/fb.hDavid S. Miller2008-02-09
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC]: Merge asm-sparc{,64}/errno.hDavid S. Miller2008-02-09
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC]: Merge asm-sparc{,64}/emergency-restart.hDavid S. Miller2008-02-09
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC]: Merge asm-sparc{,64}/div64.hDavid S. Miller2008-02-09
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC]: Merge asm-sparc{,64}/device.hDavid S. Miller2008-02-09
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC]: Merge asm-sparc{,64}/current.hDavid S. Miller2008-02-09
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC]: Merge asm-sparc{,64}/cputime.hDavid S. Miller2008-02-09
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC]: Merge asm-sparc{,64}/cache.hDavid S. Miller2008-02-09
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC]: Merge asm-sparc{,64}/byteorder.hDavid S. Miller2008-02-09
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC]: Merge asm-sparc{,64}/bugs.hDavid S. Miller2008-02-09
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC]: Merge asm-sparc{,64}/bug.hDavid S. Miller2008-02-09
| | | | | | | | Note that because of minimum compiler version enforcement in linux/compiler.h these days the check for sparc32 buggy __builtin_trap() can be safely removed. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC]: Kill BSD errno translation table and header files.David S. Miller2008-02-09
| | | | | | Completely unused. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC]: Merge asm-sparc{,64}/bpp.hDavid S. Miller2008-02-09
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC]: Merge include/asm-sparc{,64}/auxvec.hDavid S. Miller2008-02-09
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC]: Merge include/asm-sparc{,64}/of_device.hDavid S. Miller2008-02-09
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC]: Merge include/asm-sparc{,64}/prom.hDavid S. Miller2008-02-09
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC]: Remove of_platform_device_createStephen Rothwell2008-02-09
| | | | | | | There are no callers of this on the Sparc platforms. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Add kretprobe support.David S. Miller2008-02-09
| | | | | | | Passes the smoke tests at least, powerpc implementation was used as a guide. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Add SG merging support back into IOMMU code.David S. Miller2008-02-09
| | | | | | | | | | | Mimicks almost perfectly the powerpc IOMMU code, except that it doesn't have the IOMMU_PAGE_SIZE != PAGE_SIZE handling, and it also lacks the device dma mask support bits. I'll add that later as time permits, but this gets us at least back to where we were beforehand. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: IOMMU allocations using iommu-helper layer.David S. Miller2008-02-09
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds2008-02-08
|\ | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: [SPARC64]: Make use of the new fs/compat_binfmt_elf.c [SPARC64]: Make use of compat_sys_ptrace() Manually fixed trivial delete/modift conflict in arch/sparc64/kernel/binfmt_elf32.c
| * [SPARC64]: Make use of the new fs/compat_binfmt_elf.cDavid S. Miller2008-02-08
| | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Make use of compat_sys_ptrace()David S. Miller2008-02-08
| | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* | CONFIG_HIGHPTE vs. sub-page page tables.Martin Schwidefsky2008-02-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Background: I've implemented 1K/2K page tables for s390. These sub-page page tables are required to properly support the s390 virtualization instruction with KVM. The SIE instruction requires that the page tables have 256 page table entries (pte) followed by 256 page status table entries (pgste). The pgstes are only required if the process is using the SIE instruction. The pgstes are updated by the hardware and by the hypervisor for a number of reasons, one of them is dirty and reference bit tracking. To avoid wasting memory the standard pte table allocation should return 1K/2K (31/64 bit) and 2K/4K if the process is using SIE. Problem: Page size on s390 is 4K, page table size is 1K or 2K. That means the s390 version for pte_alloc_one cannot return a pointer to a struct page. Trouble is that with the CONFIG_HIGHPTE feature on x86 pte_alloc_one cannot return a pointer to a pte either, since that would require more than 32 bit for the return value of pte_alloc_one (and the pte * would not be accessible since its not kmapped). Solution: The only solution I found to this dilemma is a new typedef: a pgtable_t. For s390 pgtable_t will be a (pte *) - to be introduced with a later patch. For everybody else it will be a (struct page *). The additional problem with the initialization of the ptl lock and the NR_PAGETABLE accounting is solved with a constructor pgtable_page_ctor and a destructor pgtable_page_dtor. The page table allocation and free functions need to call these two whenever a page table page is allocated or freed. pmd_populate will get a pgtable_t instead of a struct page pointer. To get the pgtable_t back from a pmd entry that has been installed with pmd_populate a new function pmd_pgtable is added. It replaces the pmd_page call in free_pte_range and apply_to_pte_range. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | asm-*/posix_types.h: scrub __GLIBC__Mike Frysinger2008-02-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Some arches (like alpha and ia64) already have a clean posix_types.h header. This brings all the others in line by removing all references to __GLIBC__ (and some undocumented __USE_ALL). Signed-off-by: Mike Frysinger <vapier@gentoo.org> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: Ulrich Drepper <drepper@redhat.com> Cc: Roland McGrath <roland@redhat.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | aout: remove unnecessary inclusions of {asm, linux}/a.out.hDavid Howells2008-02-08
| | | | | | | | | | | | | | | | | | | | Remove now unnecessary inclusions of {asm,linux}/a.out.h. [akpm@linux-foundation.org: fix alpha build] Signed-off-by: David Howells <dhowells@redhat.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | aout: suppress A.OUT library support if !CONFIG_ARCH_SUPPORTS_AOUTDavid Howells2008-02-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Suppress A.OUT library support if CONFIG_ARCH_SUPPORTS_AOUT is not set. Not all architectures support the A.OUT binfmt, so the ELF binfmt should not be permitted to go looking for A.OUT libraries to load in such a case. Not only that, but under such conditions A.OUT core dumps are not produced either. To make this work, this patch also does the following: (1) Makes the existence of the contents of linux/a.out.h contingent on CONFIG_ARCH_SUPPORTS_AOUT. (2) Renames dump_thread() to aout_dump_thread() as it's only called by A.OUT core dumping code. (3) Moves aout_dump_thread() into asm/a.out-core.h and makes it inline. This is then included only where needed. This means that this bit of arch code will be stored in the appropriate A.OUT binfmt module rather than the core kernel. (4) Drops A.OUT support for Blackfin (according to Mike Frysinger it's not needed) and FRV. This patch depends on the previous patch to move STACK_TOP[_MAX] out of asm/a.out.h and into asm/processor.h as they're required whether or not A.OUT format is available. [jdike@addtoit.com: uml: re-remove accidentally restored code] Signed-off-by: David Howells <dhowells@redhat.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | aout: move STACK_TOP[_MAX] to asm/processor.hDavid Howells2008-02-08
|/ | | | | | | | | | Move STACK_TOP[_MAX] out of asm/a.out.h and into asm/processor.h as they're required whether or not A.OUT format is available. Signed-off-by: David Howells <dhowells@redhat.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds2008-02-07
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: [SPARC32]: Use regsets in arch_ptrace(). [SPARC64]: Use regsets in arch_ptrace(). [SPARC32]: Use regsets for ELF core dumping. [SPARC64]: Use regsets for ELF core dumping. [SPARC64]: Remove unintentional ptrace debugging messages. [SPARC]: Move over to arch_ptrace(). [SPARC]: Remove PTRACE_SUN* handling. [SPARC]: Kill DEBUG_PTRACE code. [SPARC32]: Add user regset support. [SPARC64]: Add user regsets. [SPARC64]: Fix booting on non-zero cpu.
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