- 07 May, 2007 24 commits
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David Rientjes authored
Add ptep_test_and_clear_{dirty,young} to i386. They advertise that they have it and there is at least one place where it needs to be called without the page table lock: to clear the accessed bit on write to /proc/pid/clear_refs. ptep_clear_flush_{dirty,young} are updated to use the new functions. The overall net effect to current users of ptep_clear_flush_{dirty,young} is that we introduce an additional branch. Cc: Hugh Dickins <hugh@veritas.com> Cc: Ingo Molnar <mingo@redhat.com> Signed-off-by:David Rientjes <rientjes@google.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Borislav Petkov authored
Introduce a macro for suppressing gcc from generating a warning about a probable uninitialized state of a variable. Example: - spinlock_t *ptl; + spinlock_t *uninitialized_var(ptl); Not a happy solution, but those warnings are obnoxious. - Using the usual pointlessly-set-it-to-zero approach wastes several bytes of text. - Using a macro means we can (hopefully) do something else if gcc changes cause the `x = x' hack to stop working - Using a macro means that people who are worried about hiding true bugs can easily turn it off. Signed-off-by:
Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by:
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Nick Piggin authored
Identical block is duplicated twice: contrary to the comment, we have been re-reading the page *twice* in filemap_nopage rather than once. If any retry logic or anything is needed, it belongs in lower levels anyway. Only retry once. Linus agrees. Signed-off-by:
Nick Piggin <npiggin@suse.de> Signed-off-by:
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Andy Whitcroft authored
Generally we work under the assumption that memory the mem_map array is contigious and valid out to MAX_ORDER_NR_PAGES block of pages, ie. that if we have validated any page within this MAX_ORDER_NR_PAGES block we need not check any other. This is not true when CONFIG_HOLES_IN_ZONE is set and we must check each and every reference we make from a pfn. Add a pfn_valid_within() helper which should be used when scanning pages within a MAX_ORDER_NR_PAGES block when we have already checked the validility of the block normally with pfn_valid(). This can then be optimised away when we do not have holes within a MAX_ORDER_NR_PAGES block of pages. Signed-off-by:
Andy Whitcroft <apw@shadowen.org> Acked-by:
Mel Gorman <mel@csn.ul.ie> Acked-by:
Bob Picco <bob.picco@hp.com> Signed-off-by:
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Adrian Bunk authored
Add proper prototypes in include/linux/slab.h. Signed-off-by:
Adrian Bunk <bunk@stusta.de> Signed-off-by:
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Heiko Carstens authored
Architectures that don't support DMA can say so by adding a config NO_DMA to their Kconfig file. This will prevent compilation of some dma specific driver code. Also dma-mapping-broken.h isn't needed anymore on at least s390. This avoids compilation and linking of otherwise dead/broken code. Other architectures that include dma-mapping-broken.h are arm26, h8300, m68k, m68knommu and v850. If these could be converted as well we could get rid of the header file. Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com> "John W. Linville" <linville@tuxdriver.com> Cc: Kyle McMartin <kyle@parisc-linux.org> Cc: <James.Bottomley@SteelEye.com> Cc: Tejun Heo <htejun@gmail.com> Cc: Jeff Garzik <jeff@garzik.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: <geert@linux-m68k.org> Cc: <zippel@linux-m68k.org> Cc: <spyro@f2s.com> Cc: <uclinux-v850@lsi.nec.co.jp> Cc: <ysato@users.sourceforge.jp> Signed-off-by:
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Joshua N Pritikin authored
If the badness of a process is zero then oom_adj>0 has no effect. This patch makes sure that the oom_adj shift actually increases badness points appropriately. Signed-off-by:
Joshua N. Pritikin <jpritikin@pobox.com> Cc: Andrea Arcangeli <andrea@novell.com> Signed-off-by:
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Nick Piggin authored
__block_write_full_page is calling SetPageUptodate without the page locked. This is unusual, but not incorrect, as PG_writeback is still set. However the next patch will require that SetPageUptodate always be called with the page locked. Simply don't bother setting the page uptodate in this case (it is unusual that the write path does such a thing anyway). Instead just leave it to the read side to bring the page uptodate when it notices that all buffers are uptodate. Signed-off-by:
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Nick Piggin authored
Ensure pages are uptodate after returning from read_cache_page, which allows us to cut out most of the filesystem-internal PageUptodate calls. I didn't have a great look down the call chains, but this appears to fixes 7 possible use-before uptodate in hfs, 2 in hfsplus, 1 in jfs, a few in ecryptfs, 1 in jffs2, and a possible cleared data overwritten with readpage in block2mtd. All depending on whether the filler is async and/or can return with a !uptodate page. Signed-off-by:
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Pekka Enberg authored
If slab->inuse is corrupted, cache_alloc_refill can enter an infinite loop as detailed by Michael Richardson in the following post: <http://lkml.org/lkml/2007/2/16/292>. This adds a BUG_ON to catch those cases. Cc: Michael Richardson <mcr@sandelman.ca> Acked-by:
Christoph Lameter <clameter@sgi.com> Signed-off-by:
Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by:
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Nick Piggin authored
Minimum gcc version is 3.2 now. However, with likely profiling, even modern gcc versions cannot always eliminate the call. Replace the placeholder functions with the more conventional empty static inlines, which should be optimal for everyone. Signed-off-by:
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Adrian Bunk authored
Add a proper prototype for hugetlb_get_unmapped_area() in include/linux/hugetlb.h. Signed-off-by:
William Irwin <wli@holomorphy.com> Signed-off-by:
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Christoph Lameter authored
We can use the global ZVC counters to establish the exact size of the LRU and the free pages. This allows a more accurate determination of the dirty ratio. This patch will fix the broken ratio calculations if large amounts of memory are allocated to huge pags or other consumers that do not put the pages on to the LRU. Notes: - I did not add NR_SLAB_RECLAIMABLE to the calculation of the dirtyable pages. Those may be reclaimable but they are at this point not dirtyable. If NR_SLAB_RECLAIMABLE would be considered then a huge number of reclaimable pages would stop writeback from occurring. - This patch used to be in mm as the last one in a series of patches. It was removed when Linus updated the treatment of highmem because there was a conflict. I updated the patch to follow Linus' approach. This patch is neede to fulfill the claims made in the beginning of the patchset that is now in Linus' tree. Signed-off-by:
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Christoph Lameter authored
The nr_cpu_ids value is currently only calculated in smp_init. However, it may be needed before (SLUB needs it on kmem_cache_init!) and other kernel components may also want to allocate dynamically sized per cpu array before smp_init. So move the determination of possible cpus into sched_init() where we already loop over all possible cpus early in boot. Also initialize both nr_node_ids and nr_cpu_ids with the highest value they could take. If we have accidental users before these values are determined then the current valud of 0 may cause too small per cpu and per node arrays to be allocated. If it is set to the maximum possible then we only waste some memory for early boot users. Signed-off-by:
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Jeremy Fitzhardinge authored
Add a new mm function apply_to_page_range() which applies a given function to every pte in a given virtual address range in a given mm structure. This is a generic alternative to cut-and-pasting the Linux idiomatic pagetable walking code in every place that a sequence of PTEs must be accessed. Although this interface is intended to be useful in a wide range of situations, it is currently used specifically by several Xen subsystems, for example: to ensure that pagetables have been allocated for a virtual address range, and to construct batched special pagetable update requests to map I/O memory (in ioremap()). [akpm@linux-foundation.org: fix warning, unpleasantly] Signed-off-by:
Ian Pratt <ian.pratt@xensource.com> Signed-off-by:
Christian Limpach <Christian.Limpach@cl.cam.ac.uk> Signed-off-by:
Chris Wright <chrisw@sous-sol.org> Signed-off-by:
Jeremy Fitzhardinge <jeremy@xensource.com> Cc: Christoph Lameter <clameter@sgi.com> Cc: Matt Mackall <mpm@waste.org> Acked-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Jiri Slaby authored
serial_core, use pr_debug Signed-off-by:
Jiri Slaby <jirislaby@gmail.com> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by:
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Dave Jiang authored
The MPSC serial driver assumes that interrupt is always on to pick up the DMA transmit ops that aren't submitted while the DMA engine is active. However when irqs are off for a period of time such as operations under kernel crash dump console messages do not show up due to additional DMA ops are being dropped. This makes console writes to process through all the tx DMAs queued up before submitting a new request. Also, the current locking mechanism does not protect the hardware registers and ring buffer when a printk is done during the serial write operations. The additional per port transmit lock provides a finer granular locking and protects registers being clobbered while printks are nested within UART writes. Signed-off-by:
Dave Jiang <djiang@mvista.com> Signed-off-by:
Mark A. Greer <mgreer@mvista.com> Signed-off-by:
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David Gibson authored
At present, the serial core always allows setserial in userspace to change the port address, irq and base clock of any serial port. That makes sense for legacy ISA ports, but not for (say) embedded ns16550 compatible serial ports at peculiar addresses. In these cases, the kernel code configuring the ports must know exactly where they are, and their clocking arrangements (which can be unusual on embedded boards). It doesn't make sense for userspace to change these settings. Therefore, this patch defines a UPF_FIXED_PORT flag for the uart_port structure. If this flag is set when the serial port is configured, any attempts to alter the port's type, io address, irq or base clock with setserial are ignored. In addition this patch uses the new flag for on-chip serial ports probed in arch/powerpc/kernel/legacy_serial.c, and for other hard-wired serial ports probed by drivers/serial/of_serial.c. Signed-off-by:
David Gibson <dwg@au1.ibm.com> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by:
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Thomas Koeller authored
Add support for the integrated serial ports of the MIPS RM9122 processor and its relatives. The patch also does some whitespace cleanup. [akpm@linux-foundation.org: cleanups] Signed-off-by:
Thomas Koeller <thomas.koeller@baslerweb.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by:
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Marc St-Jean authored
Serial driver patch for the PMC-Sierra MSP71xx devices. There are three different fixes: 1 Fix for DesignWare APB THRE errata: In brief, this is a non-standard 16550 in that the THRE interrupt will not re-assert itself simply by disabling and re-enabling the THRI bit in the IER, it is only re-enabled if a character is actually sent out. It appears that the "8250-uart-backup-timer.patch" in the "mm" tree also fixes it so we have dropped our initial workaround. This patch now needs to be applied on top of that "mm" patch. 2 Fix for Busy Detect on LCR write: The DesignWare APB UART has a feature which causes a new Busy Detect interrupt to be generated if it's busy when the LCR is written. This fix saves the value of the LCR and rewrites it after clearing the interrupt. 3 Workaround for interrupt/data concurrency issue: The SoC needs to ensure that writes that can cause interrupts to be cleared reach the UART before returning from the ISR. This fix reads a non-destructive register on the UART so the read transaction completion ensures the previously queued write transaction has also completed. Signed-off-by:
Marc St-Jean <Marc_St-Jean@pmc-sierra.com> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by:
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Bernhard Walle authored
PCI drivers have the new_id file in sysfs which allows new IDs to be added at runtime. The advantage is to avoid re-compilation of a driver that works for a new device, but it's ID table doesn't contain the new device. This mechanism is only meant for testing, after the driver has been tested successfully, the ID should be added in source code so that new revisions of the kernel automatically detect the device. The implementation follows the PCI implementation. The interface is documented in Documentation/pcmcia/driver.txt. Computations should be done in userspace, so the sysfs string contains the raw structure members for matching. Signed-off-by:
Bernhard Walle <bwalle@suse.de> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Greg KH <greg@kroah.com> Signed-off-by:
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David Brownell authored
This is a minor correctness fix: since the at91_cf driver probe() routine is in the init section, it should use platform_driver_probe() instead of leaving that pointer around in the driver struct after init section removal. Signed-off-by:
David Brownell <dbrownell@users.sourceforge.net> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by:
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Pekka Enberg authored
This introduce krealloc() that reallocates memory while keeping the contents unchanged. The allocator avoids reallocation if the new size fits the currently used cache. I also added a simple non-optimized version for mm/slob.c for compatibility. [akpm@linux-foundation.org: fix warnings] Acked-by:
Josef Sipek <jsipek@fsl.cs.sunysb.edu> Acked-by:
Matt Mackall <mpm@selenic.com> Acked-by:
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Linus Torvalds authored
This was broken. It adds complexity, for no good reason. Rather than separate __pa() and __pa_symbol(), we should deprecate __pa_symbol(), and preferably __pa() too - and just use "virt_to_phys()" instead, which is more readable and has nicer semantics. However, right now, just undo the separation, and make __pa_symbol() be the exact same as __pa(). That fixes the bugs this patch introduced, and we can do the fairly obvious cleanups later. Do the new __phys_addr() function (which is now the actual workhorse for the unified __pa()/__pa_symbol()) as a real external function, that way all the potential issues with compile/link-time optimizations of constant symbol addresses go away, and we can also, if we choose to, add more sanity-checking of the argument. Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Vivek Goyal <vgoyal@in.ibm.com> Cc: Andi Kleen <ak@suse.de> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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- 06 May, 2007 10 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuildLinus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild: (38 commits) kconfig: fix mconf segmentation fault kbuild: enable use of code from a different dir kconfig: error out if recursive dependencies are found kbuild: scripts/basic/fixdep segfault on pathological string-o-death kconfig: correct minor typo in Kconfig warning message. kconfig: fix path to modules.txt in Kconfig help usr/Kconfig: fix typo kernel-doc: alphabetically-sorted entries in index.html of 'htmldocs' kbuild: be more explicit on missing .config file kbuild: clarify the creation of the LOCALVERSION_AUTO string. kbuild: propagate errors from find in scripts/gen_initramfs_list.sh kconfig: refer to qt3 if we cannot find qt libraries kbuild: handle compressed cpio initramfs-es kbuild: ignore section mismatch warning for references from .paravirtprobe to .init.text kbuild: remove stale comment in modpost.c kbuild/mkuboot.sh: allow spaces in CROSS_COMPILE kbuild: fix make mrproper for Documentation/DocBook/man kbuild: remove kconfig binaries during make mrproper kconfig/menuconfig: do not hardcode '.config' kbuild: override build timestamp & version ...
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git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvmLinus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm: (66 commits) KVM: Remove unused 'instruction_length' KVM: Don't require explicit indication of completion of mmio or pio KVM: Remove extraneous guest entry on mmio read KVM: SVM: Only save/restore MSRs when needed KVM: fix an if() condition KVM: VMX: Add lazy FPU support for VT KVM: VMX: Properly shadow the CR0 register in the vcpu struct KVM: Don't complain about cpu erratum AA15 KVM: Lazy FPU support for SVM KVM: Allow passing 64-bit values to the emulated read/write API KVM: Per-vcpu statistics KVM: VMX: Avoid unnecessary vcpu_load()/vcpu_put() cycles KVM: MMU: Avoid heavy ASSERT at non debug mode. KVM: VMX: Only save/restore MSR_K6_STAR if necessary KVM: Fold drivers/kvm/kvm_vmx.h into drivers/kvm/vmx.c KVM: VMX: Don't switch 64-bit msrs for 32-bit guests KVM: VMX: Reduce unnecessary saving of host msrs KVM: Handle guest page faults when emulating mmio KVM: SVM: Report hardware exit reason to userspace instead of dmesg KVM: Retry sleeping allocation if atomic allocation fails ...
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Linus Torvalds authored
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (82 commits) [ARM] Add comments marking in-use ptrace numbers [ARM] Move syscall saving out of the way of utrace [ARM] 4360/1: S3C24XX: regs-udc.h remove unused macro [ARM] 4358/1: S3C24XX: mach-qt2410.c: remove linux/mmc/protocol.h header [ARM] mm 10: allow memory type to be specified with ioremap [ARM] mm 9: add additional device memory types [ARM] mm 8: define mem_types table L1 bit 4 to be for ARMv6 [ARM] iop: add missing parens in macro [ARM] mm 7: remove duplicated __ioremap() prototypes ARM: OMAP: fix OMAP1 mpuio suspend/resume oops ARM: OMAP: MPUIO wake updates ARM: OMAP: speed up gpio irq handling ARM: OMAP: plat-omap changes for 2430 SDP ARM: OMAP: gpio object shrinkage, cleanup ARM: OMAP: /sys/kernel/debug/omap_gpio ARM: OMAP: Implement workaround for GPIO wakeup bug in OMAP2420 silicon ARM: OMAP: Enable 24xx GPIO autoidling [ARM] 4318/2: DSM-G600 Board Support [ARM] 4227/1: minor head.S fixups [ARM] 4328/1: Move i.MX UART regs to driver ...
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Russell King authored
Conflicts: include/asm-arm/arch-ixp4xx/io.h
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Russell King authored
Merge branches 'arm-mm', 'at91', 'clkevts', 'imx', 'iop', 'misc', 'netx', 'ns9xxx', 'omap', 'pxa', 'rpc', 's3c' and 'sa1100' into devel
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Russell King authored
Signed-off-by:Russell King <rmk+kernel@arm.linux.org.uk>
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Russell King authored
utrace removes the ptrace_message field in task_struct. Move our use of this field into a new member in thread_info called "syscall" Signed-off-by: -
Marcin Garski authored
I have found small bug in mconf, when you run it without any argument it will sigsegv. Without patch: $ scripts/kconfig/mconf Segmentation fault With patch: $ scripts/kconfig/mconf can't find file (null) Signed-off-by:
Marcin Garski <mgarski@post.pl> Signed-off-by:
Sam Ravnborg <sam@ravnborg.org>
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Sam Ravnborg authored
To introduce support for source in one directory but output files in another directory during a non O= build prefix all paths with $(src) repsectively $(obj). Signed-off-by: -
Sam Ravnborg authored
Sample: config FOO bool "This is foo" depends on BAR config BAR bool "This is bar" depends on FOO This will result in following error message: error: found recursive dependency: FOO -> BAR -> FOO And will then exit with exit code equal 1 so make will stop. Inspired by patch from: Adrian Bunk <bunk@stusta.de> Signed-off-by:
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- 05 May, 2007 6 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6: [CIFS] Fix typo in cifs readme from previous commit [CIFS] Make sec=none force an anonymous mount [CIFS] Change semaphore to mutex for cifs lock_sem [CIFS] Fix oops in reset_cifs_unix_caps on reconnect [CIFS] UID/GID override on CIFS mounts to Samba [CIFS] prefixpath mounts to servers supporting posix paths used wrong slash [CIFS] Update cifs version to 1.49 [CIFS] Replace kmalloc/memset combination with kzalloc [CIFS] Add IPv6 support [CIFS] New CIFS POSIX mkdir performance improvement (part 2) [CIFS] New CIFS POSIX mkdir performance improvement [CIFS] Add write perm for usr to file on windows should remove r/o dos attr [CIFS] Remove unnecessary parm to cifs_reopen_file [CIFS] Switch cifsd to kthread_run from kernel_thread [CIFS] Remove unnecessary checks
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Steve French authored
Signed-off-by:Steve French <sfrench@us.ibm.com>
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git://one.firstfloor.org/home/andi/git/linux-2.6Linus Torvalds authored
* 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6: (231 commits) [PATCH] i386: Don't delete cpu_devs data to identify different x86 types in late_initcall [PATCH] i386: type may be unused [PATCH] i386: Some additional chipset register values validation. [PATCH] i386: Add missing !X86_PAE dependincy to the 2G/2G split. [PATCH] x86-64: Don't exclude asm-offsets.c in Documentation/dontdiff [PATCH] i386: avoid redundant preempt_disable in __unlazy_fpu [PATCH] i386: white space fixes in i387.h [PATCH] i386: Drop noisy e820 debugging printks [PATCH] x86-64: Fix allnoconfig error in genapic_flat.c [PATCH] x86-64: Shut up warnings for vfat compat ioctls on other file systems [PATCH] x86-64: Share identical video.S between i386 and x86-64 [PATCH] x86-64: Remove CONFIG_REORDER [PATCH] x86-64: Print type and size correctly for unknown compat ioctls [PATCH] i386: Remove copy_*_user BUG_ONs for (size < 0) [PATCH] i386: Little cleanups in smpboot.c [PATCH] x86-64: Don't enable NUMA for a single node in K8 NUMA scanning [PATCH] x86: Use RDTSCP for synchronous get_cycles if possible [PATCH] i386: Add X86_FEATURE_RDTSCP [PATCH] i386: Implement X86_FEATURE_SYNC_RDTSC on i386 [PATCH] i386: Implement alternative_io for i386 ... Fix up trivial conflict in include/linux/highmem.h manually. Signed-off-by:
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Linus Torvalds authored
It still used the long-deprecated "pci_module_init()" interface, rather than the proper "pci_register_driver()" one. [ I don't have the hardware, and I doubt many do, but the fix is trivial and obvious, and can't be worse than not compiling ] Signed-off-by: -
Ralf Baechle authored
CC fs/nfs/nfsroot.o fs/nfs/nfsroot.c:131: error: tokens causes a section type conflict make[2]: *** [fs/nfs/nfsroot.o] Error 1 This is due to mixing const and non-const content in the same section which halfway recent gccs absolutely hate. Fixed by dropping the const. Signed-off-by:
Ralf Baechle <ralf@linux-mips.org> Signed-off-by:
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Linus Torvalds authored
* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: [TG3]: Add TG3_FLAG_SUPPORT_MSI flag. [TG3]: Eliminate the TG3_FLAG_5701_REG_WRITE_BUG flag. [TG3]: Eliminate the TG3_FLAG_GOT_SERDES_FLOWCTL flag. [TG3]: Remove reset during MAC address changes. [TG3]: WoL fixes. [TG3]: Clear GPIO mask before storing. [TG3]: Improve NVRAM sizing. [TG3]: Fix TSO bugs. [MAC80211]: Add maintainers entry for mac80211. [MAC80211]: Add debugfs attributes. [MAC80211]: Add mac80211 wireless stack. [MAC80211]: Add generic include/linux/ieee80211.h [NETLINK]: Remove references to process ID [AF_IUCV]: Compile fix - adopt to skbuff changes.
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