- 22 9月, 2009 2 次提交
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由 Arnd Bergmann 提交于
Add a flag for mmap that will be used to request a huge page region that will look like anonymous memory to user space. This is accomplished by using a file on the internal vfsmount. MAP_HUGETLB is a modifier of MAP_ANONYMOUS and so must be specified with it. The region will behave the same as a MAP_ANONYMOUS region using small pages. The patch also adds the MAP_STACK flag, which was previously defined only on some architectures but not on others. Since MAP_STACK is meant to be a hint only, architectures can define it without assigning a specific meaning to it. Signed-off-by: NArnd Bergmann <arnd@arndb.de> Cc: Eric B Munson <ebmunson@us.ibm.com> Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk> Cc: David Rientjes <rientjes@google.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Hugh Dickins 提交于
The out-of-tree KSM used ioctls on fds cloned from /dev/ksm to register a memory area for merging: we prefer now to use an madvise(2) interface. This patch just defines MADV_MERGEABLE (to tell KSM it may merge pages in this area found identical to pages in other mergeable areas) and MADV_UNMERGEABLE (to undo that). Most architectures use asm-generic, but alpha, mips, parisc, xtensa need their own definitions: included here for mmotm convenience, but we'll probably want to split this and feed pieces to arch maintainers. Based upon earlier patches by Chris Wright and Izik Eidus. Signed-off-by: NHugh Dickins <hugh.dickins@tiscali.co.uk> Signed-off-by: NChris Wright <chrisw@redhat.com> Signed-off-by: NIzik Eidus <ieidus@redhat.com> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Helge Deller <deller@gmx.de> Cc: Chris Zankel <chris@zankel.net> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Wu Fengguang <fengguang.wu@intel.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Lee Schermerhorn <lee.schermerhorn@hp.com> Cc: Avi Kivity <avi@redhat.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 21 9月, 2009 1 次提交
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由 Ingo Molnar 提交于
Bye-bye Performance Counters, welcome Performance Events! In the past few months the perfcounters subsystem has grown out its initial role of counting hardware events, and has become (and is becoming) a much broader generic event enumeration, reporting, logging, monitoring, analysis facility. Naming its core object 'perf_counter' and naming the subsystem 'perfcounters' has become more and more of a misnomer. With pending code like hw-breakpoints support the 'counter' name is less and less appropriate. All in one, we've decided to rename the subsystem to 'performance events' and to propagate this rename through all fields, variables and API names. (in an ABI compatible fashion) The word 'event' is also a bit shorter than 'counter' - which makes it slightly more convenient to write/handle as well. Thanks goes to Stephane Eranian who first observed this misnomer and suggested a rename. User-space tooling and ABI compatibility is not affected - this patch should be function-invariant. (Also, defconfigs were not touched to keep the size down.) This patch has been generated via the following script: FILES=$(find * -type f | grep -vE 'oprofile|[^K]config') sed -i \ -e 's/PERF_EVENT_/PERF_RECORD_/g' \ -e 's/PERF_COUNTER/PERF_EVENT/g' \ -e 's/perf_counter/perf_event/g' \ -e 's/nb_counters/nb_events/g' \ -e 's/swcounter/swevent/g' \ -e 's/tpcounter_event/tp_event/g' \ $FILES for N in $(find . -name perf_counter.[ch]); do M=$(echo $N | sed 's/perf_counter/perf_event/g') mv $N $M done FILES=$(find . -name perf_event.*) sed -i \ -e 's/COUNTER_MASK/REG_MASK/g' \ -e 's/COUNTER/EVENT/g' \ -e 's/\<event\>/event_id/g' \ -e 's/counter/event/g' \ -e 's/Counter/Event/g' \ $FILES ... to keep it as correct as possible. This script can also be used by anyone who has pending perfcounters patches - it converts a Linux kernel tree over to the new naming. We tried to time this change to the point in time where the amount of pending patches is the smallest: the end of the merge window. Namespace clashes were fixed up in a preparatory patch - and some stylistic fallout will be fixed up in a subsequent patch. ( NOTE: 'counters' are still the proper terminology when we deal with hardware registers - and these sed scripts are a bit over-eager in renaming them. I've undone some of that, but in case there's something left where 'counter' would be better than 'event' we can undo that on an individual basis instead of touching an otherwise nicely automated patch. ) Suggested-by: NStephane Eranian <eranian@google.com> Acked-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: NPaul Mackerras <paulus@samba.org> Reviewed-by: NArjan van de Ven <arjan@linux.intel.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David Howells <dhowells@redhat.com> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: <linux-arch@vger.kernel.org> LKML-Reference: <new-submission> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 13 9月, 2009 1 次提交
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由 John Reiser 提交于
__start_mcount_loc[] is unused after init, yet occupies RAM forever as part of .rodata. 152kiB is typical on a 64-bit architecture. Instead, __start_mcount_loc should be in the interval [__init_begin, __init_end) so that the space is reclaimed after init. __start_mcount_loc[] is generated during the load portion of kernel build, and is used only by ftrace_init(). ftrace_init is declared '__init' and is in .init.text, which is freed after init. __start_mcount_loc is placed into .rodata by a call to MCOUNT_REC inside the RO_DATA macro of include/asm-generic/vmlinux.lds.h. The array *is* read-only, but more importantly it is not used after init. So the call to MCOUNT_REC should be moved from RO_DATA to INIT_DATA. This patch has been tested on x86_64 with CONFIG_DEBUG_PAGEALLOC=y which verifies that the address range never is accessed after init. Signed-off-by: NJohn Reiser <jreiser@BitWagon.com> LKML-Reference: <4A6DF0B6.7080402@bitwagon.com> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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- 10 9月, 2009 2 次提交
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由 Michael S. Tsirkin 提交于
kvm_para.h contains userspace interface and so should be exported. Signed-off-by: NMichael S. Tsirkin <mst@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Alex Chiang 提交于
This was #define'd as 0 on all platforms, so let's get rid of it. This change makes pci_scan_slot() slightly easier to read. Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Tony Luck <tony.luck@intel.com> Cc: David Howells <dhowells@redhat.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Reviewed-by: NMatthew Wilcox <willy@linux.intel.com> Acked-by: NRussell King <linux@arm.linux.org.uk> Acked-by: NRalf Baechle <ralf@linux-mips.org> Acked-by: NKyle McMartin <kyle@mcmartin.ca> Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: NPaul Mundt <lethal@linux-sh.org> Acked-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NAlex Chiang <achiang@hp.com> Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
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- 04 9月, 2009 1 次提交
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由 Jeremy Fitzhardinge 提交于
Pack aligned things together into a special section to minimize padding holes. Suggested-by: NEric Dumazet <eric.dumazet@gmail.com> Signed-off-by: NJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Tejun Heo <tj@kernel.org> LKML-Reference: <4AA035C0.9070202@goop.org> [ queued up in tip:x86/asm because it depends on this commit: x86/i386: Make sure stack-protector segment base is cache aligned ] Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 10 8月, 2009 1 次提交
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由 Arnd Bergmann 提交于
This moves flush_write_buffers() in asm-generic/dma-mapping-common.h to arch/x86/kernel/pci-nommu.c. The purpose of this patch is that, we can avoid defining NULL flush_write_buffers() on IA64 and SPARC. dma-mapping-common.h is used by X86 and IA64 (and SPARC soon) but only X86 with CONFIG_X86_OOSTORE or CONFIG_X86_PPRO_FENCE actually uses flush_write_buffers(). CONFIG_X86_OOSTORE or CONFIG_X86_PPRO_FENCE is usable with only kernel/pci-nommu.c (that is, not usable with other X86 IOMMU implementations such as SWIOTLB, VT-d, etc) so we can safely move flush_write_buffers() in asm-generic/dma-mapping-common.h to arch/x86/kernel/pci-nommu.c. The further discussion is: http://lkml.org/lkml/2009/6/28/104Signed-off-by: NArnd Bergmann <arnd@arndb.de> Acked-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: davem@davemloft.net Cc: tony.luck@intel.com Cc: fenghua.yu@intel.com LKML-Reference: <1249872797-1314-2-git-send-email-fujita.tomonori@lab.ntt.co.jp> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 06 8月, 2009 2 次提交
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由 Jan Engelhardt 提交于
This sockopt goes in line with SO_TYPE and SO_PROTOCOL. It makes it possible for userspace programs to pass around file descriptors — I am referring to arguments-to-functions, but it may even work for the fd passing over UNIX sockets — without needing to also pass the auxiliary information (PF_INET6/IPPROTO_TCP). Signed-off-by: NJan Engelhardt <jengelh@medozas.de> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Jan Engelhardt 提交于
Similar to SO_TYPE returning the socket type, SO_PROTOCOL allows to retrieve the protocol used with a given socket. I am not quite sure why we have that-many copies of socket.h, and why the values are not the same on all arches either, but for where hex numbers dominate, I use 0x1029 for SO_PROTOCOL as that seems to be the next free unused number across a bunch of operating systems, or so Google results make me want to believe. SO_PROTOCOL for others just uses the next free Linux number, 38. Signed-off-by: NJan Engelhardt <jengelh@medozas.de> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 28 7月, 2009 1 次提交
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由 Benjamin Herrenschmidt 提交于
mm: Pass virtual address to [__]p{te,ud,md}_free_tlb() Upcoming paches to support the new 64-bit "BookE" powerpc architecture will need to have the virtual address corresponding to PTE page when freeing it, due to the way the HW table walker works. Basically, the TLB can be loaded with "large" pages that cover the whole virtual space (well, sort-of, half of it actually) represented by a PTE page, and which contain an "indirect" bit indicating that this TLB entry RPN points to an array of PTEs from which the TLB can then create direct entries. Thus, in order to invalidate those when PTE pages are deleted, we need the virtual address to pass to tlbilx or tlbivax instructions. The old trick of sticking it somewhere in the PTE page struct page sucks too much, the address is almost readily available in all call sites and almost everybody implemets these as macros, so we may as well add the argument everywhere. I added it to the pmd and pud variants for consistency. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: David Howells <dhowells@redhat.com> [MN10300 & FRV] Acked-by: NNick Piggin <npiggin@suse.de> Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> [s390] Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 22 7月, 2009 1 次提交
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由 Magnus Damm 提交于
Allow architecture specific data in struct platform_device V3. With this patch struct pdev_archdata is added to struct platform_device, similar to struct dev_archdata in found in struct device. Useful for architecture code that needs to keep extra data associated with each platform device. Struct pdev_archdata is different from dev.platform_data, the convention is that dev.platform_data points to driver-specific data. It may or may not be required by the driver. The format of this depends on driver but is the same across architectures. The structure pdev_archdata is a place for architecture specific data. This data is handled by architecture specific code (for example runtime PM), and since it is architecture specific it should _never_ be touched by device driver code. Exactly like struct dev_archdata but for platform devices. [rjw: This change is for power management mostly and that's why it goes through the suspend tree.] Signed-off-by: NMagnus Damm <damm@igel.co.jp> Acked-by: NKevin Hilman <khilman@deeprootsystems.com> Acked-by: NGreg Kroah-Hartman <gregkh@suse.de> Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
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- 18 7月, 2009 1 次提交
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由 Tim Abbott 提交于
The BSS section macros in vmlinux.lds.h currently place the .sbss input section outside the bounds of [__bss_start, __bss_end]. On all architectures except for microblaze that handle both .sbss and __bss_start/__bss_end, this is wrong: the .sbss input section is within the range [__bss_start, __bss_end]. Relatedly, the example code at the top of the file actually has __bss_start/__bss_end defined twice; I believe the right fix here is to define them in the BSS_SECTION macro but not in the BSS macro. Another problem with the current macros is that several architectures have an ALIGN(4) or some other small number just before __bss_stop in their linker scripts. The BSS_SECTION macro currently hardcodes this to 4; while it should really be an argument. It also ignores its sbss_align argument; fix that. mn10300 is the only user at present of any of the macros touched by this patch. It looks like mn10300 actually was incorrectly converted to use the new BSS() macro (the alignment of 4 prior to conversion was a __bss_stop alignment, but the argument to the BSS macro is a start alignment). So fix this as well. I'd like acks from Sam and David on this one. Also CCing Paul, since he has a patch from me which will need to be updated to use BSS_SECTION(0, PAGE_SIZE, 4) once this gets merged. Signed-off-by: NTim Abbott <tabbott@ksplice.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: David Howells <dhowells@redhat.com> Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
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- 09 7月, 2009 1 次提交
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由 Tejun Heo 提交于
Discarded sections in different archs share some commonality but have considerable differences. This led to linker script for each arch implementing its own /DISCARD/ definition, which makes maintaining tedious and adding new entries error-prone. This patch makes all linker scripts to move discard definitions to the end of the linker script and use the common DISCARDS macro. As ld uses the first matching section definition, archs can include default discarded sections by including them earlier in the linker script. ia64 is notable because it first throws away some ia64 specific subsections and then include the rest of the sections into the final image, so those sections must be discarded before the inclusion. defconfig compile tested for x86, x86-64, powerpc, powerpc64, ia64, alpha, sparc, sparc64 and s390. Michal Simek tested microblaze. Signed-off-by: NTejun Heo <tj@kernel.org> Acked-by: NPaul Mundt <lethal@linux-sh.org> Acked-by: NMike Frysinger <vapier@gentoo.org> Tested-by: NMichal Simek <monstr@monstr.eu> Cc: linux-arch@vger.kernel.org Cc: Michal Simek <monstr@monstr.eu> Cc: microblaze-uclinux@itee.uq.edu.au Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Tony Luck <tony.luck@intel.com>
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- 01 7月, 2009 2 次提交
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由 Tejun Heo 提交于
alpha percpu access requires custom SHIFT_PERCPU_PTR() definition for modules to work around addressing range limitation. This is done via generating inline assembly using C preprocessing which forces the assembler to generate external reference. This happens behind the compiler's back and makes the compiler think that static percpu variables in modules are unused. This used to be worked around by using __unused attribute for percpu variables which prevent the compiler from omitting the variable; however, recent declare/definition attribute unification change broke this as __used can't be used for declaration. Also, in the process, PER_CPU_ATTRIBUTES definition in alpha percpu.h got broken. This patch adds PER_CPU_DEF_ATTRIBUTES which is only used for definitions and make alpha use it to add __used for percpu variables in modules. This also fixes the PER_CPU_ATTRIBUTES double definition bug. Signed-off-by: NTejun Heo <tj@kernel.org> Tested-by: Nmaximilian attems <max@stro.at> Acked-by: NIvan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Richard Henderson <rth@twiddle.net> Cc: <stable@kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Heiko Carstens 提交于
The ctors section for each object file is eight byte aligned (on 64 bit). However the __ctors_start symbol starts at an arbitrary address dependent on the size of the previous sections. Therefore the linker may add some zeroes after __ctors_start to make sure the ctors contents are properly aligned. However the extra zeroes at the beginning aren't expected by the code. When walking the functions pointers contained in there and extra zeroes are added this may result in random jumps. So make sure that the __ctors_start symbol is always aligned as well. Fixes this crash on an allyesconfig on s390: [ 0.582482] Kernel BUG at 0000000000000012 [verbose debug info unavailable] [ 0.582489] illegal operation: 0001 [#1] SMP DEBUG_PAGEALLOC [ 0.582496] Modules linked in: [ 0.582501] CPU: 0 Tainted: G W 2.6.31-rc1-dirty #273 [ 0.582506] Process swapper (pid: 1, task: 000000003f218000, ksp: 000000003f2238e8) [ 0.582510] Krnl PSW : 0704200180000000 0000000000000012 (0x12) [ 0.582518] R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:0 CC:2 PM:0 EA:3 [ 0.582524] Krnl GPRS: 0000000000036727 0000000000000010 0000000000000001 0000000000000001 [ 0.582529] 00000000001dfefa 0000000000000000 0000000000000000 0000000000000040 [ 0.582534] 0000000001fff0f0 0000000001790628 0000000002296048 0000000002296048 [ 0.582540] 00000000020c438e 0000000001786000 0000000002014a66 000000003f223e60 [ 0.582553] Krnl Code:>0000000000000012: 0000 unknown [ 0.582559] 0000000000000014: 0000 unknown [ 0.582564] 0000000000000016: 0000 unknown [ 0.582570] 0000000000000018: 0000 unknown [ 0.582575] 000000000000001a: 0000 unknown [ 0.582580] 000000000000001c: 0000 unknown [ 0.582585] 000000000000001e: 0000 unknown [ 0.582591] 0000000000000020: 0000 unknown [ 0.582596] Call Trace: [ 0.582599] ([<0000000002014a46>] kernel_init+0x622/0x7a0) [ 0.582607] [<0000000000113e22>] kernel_thread_starter+0x6/0xc [ 0.582615] [<0000000000113e1c>] kernel_thread_starter+0x0/0xc [ 0.582621] INFO: lockdep is turned off. [ 0.582624] Last Breaking-Event-Address: [ 0.582627] [<0000000002014a64>] kernel_init+0x640/0x7a0 Cc: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 27 6月, 2009 2 次提交
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由 Tim Abbott 提交于
We recently added a INIT_TASK(align) in include/asm-generic/vmlinux.lds.h, but there is already a macro INIT_TASK in include/linux/init_task.h, which is quite confusing. We should switch the macro in the linker script to INIT_TASK_DATA. (Sorry that I missed this in reviewing the patch). Since the macros are new, there is only one user of the INIT_TASK in vmlinux.lds.h, arch/mn10300/kernel/vmlinux.lds.S. However, we are currently using INIT_TASK_DATA for laying down an entire .data.init_task section. So rename that to INIT_TASK_DATA_SECTION. I would be worried about changing the meaning of INIT_TASK_DATA, but the old INIT_TASK_DATA implementation had no users, and in fact if anyone had tried to use it, it would have failed to compile because it didn't pass the alignment to the old INIT_TASK. Signed-off-by: NTim Abbott <tabbott@ksplice.com> Cc: David Howells <dhowells@redhat.com> Cc: Jesper Nilsson <Jesper.Nilsson@axis.com Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
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由 Paul Mundt 提交于
RW_DATA_SECTION is defined to take 4 different alignment parameters, while NOSAVE_DATA currently uses a fixed PAGE_SIZE alignment as noted in the comments. There are presently no in-tree users of this at present, and I just stumbled across this while implementing the simplified script on a new architecture port, which subsequently resulted in a syntax error. Signed-off-by: NPaul Mundt <lethal@linux-sh.org> Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
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- 24 6月, 2009 1 次提交
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由 Tejun Heo 提交于
x86 throws away .discard section but no other archs do. Also, .discard is not thrown away while linking modules. Make every arch and module linking throw it away. This will be used to define dummy variables for percpu declarations and definitions. This patch is based on Ivan Kokshaysky's alpha percpu patch. [ Impact: always throw away everything in .discard ] Signed-off-by: NTejun Heo <tj@kernel.org> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Richard Henderson <rth@twiddle.net> Cc: Russell King <linux@arm.linux.org.uk> Cc: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: Bryan Wu <cooloney@kernel.org> Cc: Mikael Starvik <starvik@axis.com> Cc: Jesper Nilsson <jesper.nilsson@axis.com> Cc: David Howells <dhowells@redhat.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Tony Luck <tony.luck@intel.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Michal Simek <monstr@monstr.eu> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: David S. Miller <davem@davemloft.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Chris Zankel <chris@zankel.net> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Ingo Molnar <mingo@elte.hu>
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- 23 6月, 2009 2 次提交
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由 Paul Mundt 提交于
Most architectures now provide a pgprot_noncached(), the remaining ones can simply use an dummy default implementation, except for cris and xtensa, which should override the default appropriately. Signed-off-by: NArnd Bergmann <arnd@arndb.de> Cc: Jesper Nilsson <jesper.nilsson@axis.com> Cc: Chris Zankel <chris@zankel.net> Cc: Magnus Damm <magnus.damm@gmail.com>
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由 David Howells 提交于
In asm-generic/vmlinux.lds.h, name INIT_RAM_FS consistently, no matter the setting of CONFIG_BLK_DEV_INITRD. This corrects: commit ef53dae8 Author: Sam Ravnborg <sam@ravnborg.org> Date: Sun Jun 7 20:46:37 2009 +0200 Subject: Improve vmlinux.lds.h support for arch specific linker scripts Signed-off-by: NDavid Howells <dhowells@redhat.com> Acked-by: NSam Ravnborg <sam@ravnborg.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 19 6月, 2009 6 次提交
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由 Arnd Bergmann 提交于
sys_rt_tgsigqueueinfo and sys_perf_counter_open have been added in 2.6.31, so hook them up in the generic unistd.h file. Since the file is now in the mainline kernel, we are no longer reordering the numbers but just add system calls at the end. Signed-off-by: NArnd Bergmann <arnd@arndb.de>
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由 Arnd Bergmann 提交于
Architechtures normally don't need to set a HARDIRQ_BITS unless they have hardcoded a specific value in assembly. This drops the definition from asm-generic/hardirq.h, which results in linux/hardirq.h setting its default of 10. Both the old default of 8 and the linux/hardirq.h default of 10 are sufficient because they only limit the number of nested hardirqs, and we normally run out of stack space much earlier than exceeding 256 or even 1024 nested interrupts. Reported-by: NMike Frysinger <vapier@gentoo.org> Acked-by: NSteven Rostedt <rostedt@goodmis.org> Signed-off-by: NArnd Bergmann <arnd@arndb.de>
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由 Mike Frysinger 提交于
There's no reason that I can see to use the short __access_ok() form directly when the access_ok() is clearer in intent and for most people, expands to the same C code (i.e. always specify the first field -- access type). Not all no-mmu systems lack memory protection, so the read/write could feasibly be checked. Signed-off-by: NMike Frysinger <vapier@gentoo.org> Signed-off-by: NArnd Bergmann <arnd@arndb.de>
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由 Mike Frysinger 提交于
The strnlen_user() function was missing a access_ok() check on the pointer given. We've had cases on Blackfin systems where test programs caused kernel crashes here because userspace passed up a NULL/-1 pointer and the kernel gladly attempted to run strlen() on it. Signed-off-by: NMike Frysinger <vapier@gentoo.org> Signed-off-by: NArnd Bergmann <arnd@arndb.de>
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由 FUJITA Tomonori 提交于
We unified x86 and IA64's handling of multiple dma mapping operations (struct dma_map_ops in linux/dma-mapping.h) so we can remove duplication in their arch/include/asm/dma-mapping.h. This patchset adds include/asm-generic/dma-mapping-common.h that provides some generic dma mapping function definitions for the users of struct dma_map_ops. This enables us to remove about 100 lines. This also enables us to easily add CONFIG_DMA_API_DEBUG support, which only x86 supports for now. The 4th patch adds CONFIG_DMA_API_DEBUG support to IA64 by adding only 8 lines. This patch: This header file provides some mapping function definitions that the users of struct dma_map_ops can use. Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: NJoerg Roedel <joerg.roedel@amd.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Peter Oberparleiter 提交于
Call constructors (gcc-generated initcall-like functions) during kernel start and module load. Constructors are e.g. used for gcov data initialization. Disable constructor support for usermode Linux to prevent conflicts with host glibc. Signed-off-by: NPeter Oberparleiter <oberpar@linux.vnet.ibm.com> Acked-by: NRusty Russell <rusty@rustcorp.com.au> Acked-by: NWANG Cong <xiyou.wangcong@gmail.com> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Jeff Dike <jdike@addtoit.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Huang Ying <ying.huang@intel.com> Cc: Li Wei <W.Li@Sun.COM> Cc: Michael Ellerman <michaele@au1.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Heiko Carstens <heicars2@linux.vnet.ibm.com> Cc: Martin Schwidefsky <mschwid2@linux.vnet.ibm.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 18 6月, 2009 1 次提交
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由 Matthew Wilcox 提交于
This function was only used by pci_claim_resource(), and the last commit deleted that use. Signed-off-by: NMatthew Wilcox <willy@linux.intel.com> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 17 6月, 2009 1 次提交
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由 Randy Dunlap 提交于
Convert most arches to use asm-generic/kmap_types.h. Move the KM_FENCE_ macro additions into asm-generic/kmap_types.h, controlled by __WITH_KM_FENCE from each arch's kmap_types.h file. Would be nice to be able to add custom KM_types per arch, but I don't yet see a nice, clean way to do that. Built on x86_64, i386, mips, sparc, alpha(tonyb), powerpc(tonyb), and 68k(tonyb). Note: avr32 should be able to remove KM_PTE2 (since it's not used) and then just use the generic kmap_types.h file. Get avr32 maintainer approval. Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com> Cc: <linux-arch@vger.kernel.org> Acked-by: NMike Frysinger <vapier@gentoo.org> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Bryan Wu <cooloney@kernel.org> Cc: Mikael Starvik <starvik@axis.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: "Luck Tony" <tony.luck@intel.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: David Howells <dhowells@redhat.com> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 15 6月, 2009 2 次提交
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由 Paul Mackerras 提交于
Many processor architectures have no 64-bit atomic instructions, but we need atomic64_t in order to support the perf_counter subsystem. This adds an implementation of 64-bit atomic operations using hashed spinlocks to provide atomicity. For each atomic operation, the address of the atomic64_t variable is hashed to an index into an array of 16 spinlocks. That spinlock is taken (with interrupts disabled) around the operation, which can then be coded non-atomically within the lock. On UP, all the spinlock manipulation goes away and we simply disable interrupts around each operation. In fact gcc eliminates the whole atomic64_lock variable as well. Signed-off-by: NPaul Mackerras <paulus@samba.org> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Sam Ravnborg 提交于
Updated after review by Tim Abbott. - Use HEAD_TEXT_SECTION - Drop use of section-names.h and delete file - Introduce EXIT_CALL Deleting section-names.h required a few simple updates of init.h Signed-off-by: NSam Ravnborg <sam@ravnborg.org> Cc: Tim Abbott <tabbott@ksplice.com>
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- 12 6月, 2009 9 次提交
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由 Arnd Bergmann 提交于
Add a generic (unoptimized) implementation of checksum.c in pure C for use by all architectures that cannot be bother with implementing their own version. Based on microblaze code by Michal Simek <monstr@monstr.eu> Cc: Michal Simek <monstr@monstr.eu> Signed-off-by: NRemis Lima Baima <remis.developer@googlemail.com> Signed-off-by: NArnd Bergmann <arnd@arndb.de>
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由 Arnd Bergmann 提交于
Based on discussions with Michal Simek and code from m68knommu and h8300, this version of uaccess.h should be usable by most architectures, by overriding some parts of it. Simple NOMMU architectures can use it out of the box, but a minimal __access_ok() should be added there as well. Cc: Michal Simek <monstr@monstr.eu> Signed-off-by: NArnd Bergmann <arnd@arndb.de>
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由 Arnd Bergmann 提交于
Memory management in generic is highly architecture specific, but on NOMMU architectures, it is mostly trivial, so just add a default implementation in asm-generic that applies to all NOMMU architectures. The two files cache.h and cacheflush.h can possibly also be used by architectures that have an MMU but never require flushing the cache or have cache lines larger than 32 bytes. Signed-off-by: NRemis Lima Baima <remis.developer@googlemail.com> Signed-off-by: NArnd Bergmann <arnd@arndb.de>
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由 Arnd Bergmann 提交于
atomic.h and io.h are based on the mn10300 architecture, which is already pretty generic and can be used by other architectures that do not have hardware support for atomic operations or out-of-order I/O access. Signed-off-by: NArnd Bergmann <arnd@arndb.de>
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由 Arnd Bergmann 提交于
The dma.h, hw_irq.h, serial.h and timex.h files originally described PC-style i8237, i8259A, i8250, i8253 and i8255 chips as well as the VGA style text mode graphics. Modern architectures live happily without these specific interfaces, but a few definitions from these headers keep getting used in common code. The new generic headers are what most architectures use anyway nowadays, just implementing the minimal definitions. Signed-off-by: NRemis Lima Baima <remis.developer@googlemail.com> Signed-off-by: NArnd Bergmann <arnd@arndb.de>
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由 Arnd Bergmann 提交于
These are all kernel internal interfaces that get copied around a lot. In most cases, architectures can provide their own optimized versions, but these generic versions can work as well. I have tried to use the most common contents of each header to allow existing architectures to migrate easily. Thanks to Remis for suggesting a number of cleanups. Signed-off-by: NRemis Lima Baima <remis.developer@googlemail.com> Signed-off-by: NArnd Bergmann <arnd@arndb.de>
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由 Arnd Bergmann 提交于
bitops.h apparently suffered from some level of bitrot, it was missing the smp_mb__{before,after}_clear_bit functions, and included other headers in an invalid order. This changes the file so that new architectures can use it out of the box. Signed-off-by: NRemis Lima Baima <remis.developer@googlemail.com> Signed-off-by: NArnd Bergmann <arnd@arndb.de>
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由 Arnd Bergmann 提交于
Some generic code is using the horribly misnamed PCI_DMA_BUS_IS_PHYS from asm/pci.h. This makes sure that an architecture without PCI support does not have to define this itself but can rely on the asm-generic version. Signed-off-by: NRemis Lima Baima <remis.developer@googlemail.com> Signed-off-by: NArnd Bergmann <arnd@arndb.de>
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由 Arnd Bergmann 提交于
Evidently, set_rtc_time is supposed to be overridable by architectures that define their own version, but unfortunately, get_rtc_ss would in that case still use the generic version. This makes get_rtc_ss call the real set_rtc_time to let architectures define their own version. The change should fix the "Extended RTC operation" on Alpha, which uses the incorrect get_rtc_ss call. It also allows PowerPC to use the asm-generic/rtc.h file in the future. Cc: Richard Henderson <rth@twiddle.net> Cc: linux-alpha@vger.kernel.org Cc: Tom Rini <trini@mvista.com> Cc: rtc-linux@googlegroups.com Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Paul Gortmaker <p_gortmaker@yahoo.com> Signed-off-by: NArnd Bergmann <arnd@arndb.de>
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