Eric Lee / smarc-fsl-linux-kernel

26 Sep, 2006

1 commit

  • 46a82b2d5   [PATCH] Standardize pxx_page macros ... Browse Code »

    One of the changes necessary for shared page tables is to standardize the
    pxx_page macros. pte_page and pmd_page have always returned the struct
    page associated with their entry, while pte_page_kernel and pmd_page_kernel
    have returned the kernel virtual address. pud_page and pgd_page, on the
    other hand, return the kernel virtual address.

    Shared page tables needs pud_page and pgd_page to return the actual page
    structures. There are very few actual users of these functions, so it is
    simple to standardize their usage.

    Since this is basic cleanup, I am submitting these changes as a standalone
    patch. Per Hugh Dickins' comments about it, I am also changing the
    pxx_page_kernel macros to pxx_page_vaddr to clarify their meaning.

    Signed-off-by: Dave McCracken
    Cc: Hugh Dickins
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Dave McCracken
     

21 Sep, 2006

1 commit

15 Jul, 2006

1 commit

  • 52393ccc0   [PATCH] remove set_wmb - arch removal ... Browse Code »

    set_wmb should not be used in the kernel because it just confuses the
    code more and has no benefit. Since it is not currently used in the
    kernel this patch removes it so that new code does not include it.

    All archs define set_wmb(var, value) to do { var = value; wmb(); }
    while(0) except ia64 and sparc which use a mb() instead. But this is
    still moot since it is not used anyway.

    Hasn't been tested on any archs but x86 and x86_64 (and only compiled
    tested)

    Signed-off-by: Steven Rostedt
    Signed-off-by: Linus Torvalds

    Steven Rostedt
     

05 Jul, 2006

1 commit

  • 6fa0cb114   Merge git://git.infradead.org/hdrinstall-2.6 ... Browse Code »

    * git://git.infradead.org/hdrinstall-2.6:
    Remove export of include/linux/isdn/tpam.h
    Remove and from userspace export
    Restrict headers exported to userspace for SPARC and SPARC64
    Add empty Kbuild files for 'make headers_install' in remaining arches.
    Add Kbuild file for Alpha 'make headers_install'
    Add Kbuild file for SPARC 'make headers_install'
    Add Kbuild file for IA64 'make headers_install'
    Add Kbuild file for S390 'make headers_install'
    Add Kbuild file for i386 'make headers_install'
    Add Kbuild file for x86_64 'make headers_install'
    Add Kbuild file for PowerPC 'make headers_install'
    Add generic Kbuild files for 'make headers_install'
    Basic implementation of 'make headers_check'
    Basic implementation of 'make headers_install'

    Linus Torvalds
     

03 Jul, 2006

1 commit

01 Jul, 2006

1 commit

30 Jun, 2006

3 commits

  • 877ce7c1b   [AF_UNIX]: Datagram getpeersec ... Browse Code »

    This patch implements an API whereby an application can determine the
    label of its peer's Unix datagram sockets via the auxiliary data mechanism of
    recvmsg.

    Patch purpose:

    This patch enables a security-aware application to retrieve the
    security context of the peer of a Unix datagram socket. The application
    can then use this security context to determine the security context for
    processing on behalf of the peer who sent the packet.

    Patch design and implementation:

    The design and implementation is very similar to the UDP case for INET
    sockets. Basically we build upon the existing Unix domain socket API for
    retrieving user credentials. Linux offers the API for obtaining user
    credentials via ancillary messages (i.e., out of band/control messages
    that are bundled together with a normal message). To retrieve the security
    context, the application first indicates to the kernel such desire by
    setting the SO_PASSSEC option via getsockopt. Then the application
    retrieves the security context using the auxiliary data mechanism.

    An example server application for Unix datagram socket should look like this:

    toggle = 1;
    toggle_len = sizeof(toggle);

    setsockopt(sockfd, SOL_SOCKET, SO_PASSSEC, &toggle, &toggle_len);
    recvmsg(sockfd, &msg_hdr, 0);
    if (msg_hdr.msg_controllen > sizeof(struct cmsghdr)) {
    cmsg_hdr = CMSG_FIRSTHDR(&msg_hdr);
    if (cmsg_hdr->cmsg_len cmsg_level == SOL_SOCKET &&
    cmsg_hdr->cmsg_type == SCM_SECURITY) {
    memcpy(&scontext, CMSG_DATA(cmsg_hdr), sizeof(scontext));
    }
    }

    sock_setsockopt is enhanced with a new socket option SOCK_PASSSEC to allow
    a server socket to receive security context of the peer.

    Testing:

    We have tested the patch by setting up Unix datagram client and server
    applications. We verified that the server can retrieve the security context
    using the auxiliary data mechanism of recvmsg.

    Signed-off-by: Catherine Zhang
    Acked-by: Acked-by: James Morris
    Signed-off-by: David S. Miller

    Catherine Zhang
     
  • c0ad90a32   [PATCH] genirq: add ->retrigger() irq op to consolidate hw_irq_resend() ... Browse Code »

    Add ->retrigger() irq op to consolidate hw_irq_resend() implementations.
    (Most architectures had it defined to NOP anyway.)

    NOTE: ia64 needs testing. i386 and x86_64 tested.

    Signed-off-by: Ingo Molnar
    Signed-off-by: Thomas Gleixner
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Ingo Molnar
     
  • 0d7012a96   [PATCH] genirq: cleanup: turn ARCH_HAS_IRQ_PER_CPU into CONFIG_IRQ_PER_CPU ... Browse Code »

    Cleanup: change ARCH_HAS_IRQ_PER_CPU into a Kconfig method.

    Signed-off-by: Ingo Molnar
    Signed-off-by: Thomas Gleixner
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Ingo Molnar
     

18 Jun, 2006

1 commit

29 Apr, 2006

1 commit

26 Apr, 2006

1 commit

11 Apr, 2006

2 commits

  • 491d4bed8   [PATCH] sys_kexec_load() naming fixups ... Browse Code »

    __NR_sys_kexec_load should be __NR_kexec_load. Mainly affects users of the
    _syscallN() macros, and glibc is already checking for __NR_kexec_load.

    Cc: Ulrich Drepper
    Cc: "Eric W. Biederman"
    Cc: Mikael Starvik
    Cc: David Howells
    Cc: Yoshinori Sato
    Cc: Hirokazu Takata
    Cc: Paul Mundt
    Cc: Kazumoto Kojima
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Andrew Morton
     
  • bad7af550   [PATCH] Remove unused prepare_to_switch macro ... Browse Code »

    Remove unused prepare_to_switch() macros.

    Signed-off-by: Hirokazu Takata
    Cc: Mikael Starvik
    Cc: David Howells
    Cc: Yoshinori Sato
    Cc: Miles Bader
    Cc: Chris Zankel
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Hirokazu Takata
     

28 Mar, 2006

1 commit

27 Mar, 2006

3 commits

  • e9f26df17   [PATCH] bitops: cris: use generic bitops ... Browse Code »

    - remove __{,test_and_}{set,clear,change}_bit() and test_bit()
    - remove generic_fls()
    - remove generic_fls64()
    - remove generic_hweight{32,16,8}()
    - remove find_{next,first}{,_zero}_bit()
    - remove ext2_{set,clear,test,find_first_zero,find_next_zero}_bit()
    - remove minix_{test,set,test_and_clear,test,find_first_zero}_bit()
    - remove sched_find_first_bit()

    Signed-off-by: Akinobu Mita
    Acked-by: Mikael Starvik
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Akinobu Mita
     
  • 67b0ad574   [PATCH] bitops: use non atomic operations for minix_*_bit() and ext2_*_bit() ... Browse Code »

    Bitmap functions for the minix filesystem and the ext2 filesystem except
    ext2_set_bit_atomic() and ext2_clear_bit_atomic() do not require the atomic
    guarantees.

    But these are defined by using atomic bit operations on several architectures.
    (cris, frv, h8300, ia64, m32r, m68k, m68knommu, mips, s390, sh, sh64, sparc,
    sparc64, v850, and xtensa)

    This patch switches to non atomic bit operation.

    Signed-off-by: Akinobu Mita
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Akinobu Mita
     
  • 72b61a3cf   [PATCH] bitops: cris: remove unnecessary local_irq_restore() ... Browse Code »

    remove unnecessary local_irq_restore() after cris_atomic_restore() in
    test_and_set_bit().

    Signed-off-by: Akinobu Mita
    Cc: Mikael Starvik
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Akinobu Mita
     

26 Mar, 2006

1 commit

  • f348d70a3   [PATCH] POLLRDHUP/EPOLLRDHUP handling for half-closed devices notifications ... Browse Code »

    Implement the half-closed devices notifiation, by adding a new POLLRDHUP
    (and its alias EPOLLRDHUP) bit to the existing poll/select sets. Since the
    existing POLLHUP handling, that does not report correctly half-closed
    devices, was feared to be changed, this implementation leaves the current
    POLLHUP reporting unchanged and simply add a new bit that is set in the few
    places where it makes sense. The same thing was discussed and conceptually
    agreed quite some time ago:

    http://lkml.org/lkml/2003/7/12/116

    Since this new event bit is added to the existing Linux poll infrastruture,
    even the existing poll/select system calls will be able to use it. As far
    as the existing POLLHUP handling, the patch leaves it as is. The
    pollrdhup-2.6.16.rc5-0.10.diff defines the POLLRDHUP for all the existing
    archs and sets the bit in the six relevant files. The other attached diff
    is the simple change required to sys/epoll.h to add the EPOLLRDHUP
    definition.

    There is "a stupid program" to test POLLRDHUP delivery here:

    http://www.xmailserver.org/pollrdhup-test.c

    It tests poll(2), but since the delivery is same epoll(2) will work equally.

    Signed-off-by: Davide Libenzi
    Cc: "David S. Miller"
    Cc: Michael Kerrisk
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Davide Libenzi
     

24 Mar, 2006

1 commit

  • cdb045278   [PATCH] kill include/linux/platform.h, default_idle() cleanup ... Browse Code »

    include/linux/platform.h contained nothing that was actually used except
    the default_idle() prototype, and is therefore removed by this patch.

    This patch does the following with the platform specific default_idle()
    functions on different architectures:
    - remove the unused function:
    - parisc
    - sparc64
    - make the needlessly global function static:
    - arm
    - h8300
    - m68k
    - m68knommu
    - s390
    - v850
    - x86_64
    - add a prototype in asm/system.h:
    - cris
    - i386
    - ia64

    Signed-off-by: Adrian Bunk
    Acked-by: Patrick Mochel
    Acked-by: Kyle McMartin
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Adrian Bunk
     

16 Feb, 2006

1 commit

  • 5f6164f30   [PATCH] add asm-generic/mman.h ... Browse Code »

    Make new MADV_REMOVE, MADV_DONTFORK, MADV_DOFORK consistent across all
    arches. The idea is to make it possible to use them portably even before
    distros include them in libc headers.

    Move common flags to asm-generic/mman.h

    Signed-off-by: Michael S. Tsirkin
    Cc: Roland Dreier
    Cc: Badari Pulavarty
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Michael S. Tsirkin
     

15 Feb, 2006

1 commit

  • f82256616   [PATCH] madvise MADV_DONTFORK/MADV_DOFORK ... Browse Code »

    Currently, copy-on-write may change the physical address of a page even if the
    user requested that the page is pinned in memory (either by mlock or by
    get_user_pages). This happens if the process forks meanwhile, and the parent
    writes to that page. As a result, the page is orphaned: in case of
    get_user_pages, the application will never see any data hardware DMA's into
    this page after the COW. In case of mlock'd memory, the parent is not getting
    the realtime/security benefits of mlock.

    In particular, this affects the Infiniband modules which do DMA from and into
    user pages all the time.

    This patch adds madvise options to control whether memory range is inherited
    across fork. Useful e.g. for when hardware is doing DMA from/into these
    pages. Could also be useful to an application wanting to speed up its forks
    by cutting large areas out of consideration.

    Signed-off-by: Michael S. Tsirkin
    Acked-by: Hugh Dickins
    Cc: Michael Kerrisk
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Michael S. Tsirkin
     

04 Feb, 2006

1 commit

  • bcc68b861   [PATCH] include/asm-*/bitops.h: fix more "~0UL >> size" typos ... Browse Code »

    "[PATCH] m68knommu: fix find_next_zero_bit in bitops.h" fixed a typo in
    m68knommu implementation of find_next_zero_bit().

    grep(1) shows that cris, frv, h8300, v850 are also affected.

    Signed-off-by: Alexey Dobriyan
    Cc: Mikael Starvik
    Cc: David Howells
    Cc: Yoshinori Sato
    Cc: Miles Bader
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Alexey Dobriyan
     

13 Jan, 2006

3 commits

11 Jan, 2006

1 commit

10 Jan, 2006

2 commits

09 Jan, 2006

2 commits

  • f8aaeacec   [PATCH] consolidate asm/futex.h ... Browse Code »

    Most of the architectures have the same asm/futex.h. This consolidates them
    into asm-generic, with the arches including it from their own asm/futex.h.

    In the case of UML, this reverts the old broken futex.h and goes back to using
    the same one as almost everyone else.

    Signed-off-by: Jeff Dike
    Cc: Paolo 'Blaisorblade' Giarrusso
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Jeff Dike
     
  • 1fd73c6b6   [PATCH] Kill L1_CACHE_SHIFT_MAX ... Browse Code »

    Kill L1_CACHE_SHIFT from all arches. Since L1_CACHE_SHIFT_MAX is not used
    anymore with the introduction of INTERNODE_CACHE, kill L1_CACHE_SHIFT_MAX.

    Signed-off-by: Ravikiran Thirumalai
    Signed-off-by: Shai Fultheim
    Signed-off-by: Andi Kleen
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Ravikiran G Thirumalai
     

07 Jan, 2006

2 commits

  • d3cb48714   [PATCH] atomic_long_t & include/asm-generic/atomic.h V2 ... Browse Code »

    Several counters already have the need to use 64 atomic variables on 64 bit
    platforms (see mm_counter_t in sched.h). We have to do ugly ifdefs to fall
    back to 32 bit atomic on 32 bit platforms.

    The VM statistics patch that I am working on will also make more extensive
    use of atomic64.

    This patch introduces a new type atomic_long_t by providing definitions in
    asm-generic/atomic.h that works similar to the c "long" type. Its 32 bits
    on 32 bit platforms and 64 bits on 64 bit platforms.

    Also cleans up the determination of the mm_counter_t in sched.h.

    Signed-off-by: Christoph Lameter
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Christoph Lameter
     
  • f6b3ec238   [PATCH] madvise(MADV_REMOVE): remove pages from tmpfs shm backing store ... Browse Code »

    Here is the patch to implement madvise(MADV_REMOVE) - which frees up a
    given range of pages & its associated backing store. Current
    implementation supports only shmfs/tmpfs and other filesystems return
    -ENOSYS.

    "Some app allocates large tmpfs files, then when some task quits and some
    client disconnect, some memory can be released. However the only way to
    release tmpfs-swap is to MADV_REMOVE". - Andrea Arcangeli

    Databases want to use this feature to drop a section of their bufferpool
    (shared memory segments) - without writing back to disk/swap space.

    This feature is also useful for supporting hot-plug memory on UML.

    Concerns raised by Andrew Morton:

    - "We have no plan for holepunching! If we _do_ have such a plan (or
    might in the future) then what would the API look like? I think
    sys_holepunch(fd, start, len), so we should start out with that."

    - Using madvise is very weird, because people will ask "why do I need to
    mmap my file before I can stick a hole in it?"

    - None of the other madvise operations call into the filesystem in this
    manner. A broad question is: is this capability an MM operation or a
    filesytem operation? truncate, for example, is a filesystem operation
    which sometimes has MM side-effects. madvise is an mm operation and with
    this patch, it gains FS side-effects, only they're really, really
    significant ones."

    Comments:

    - Andrea suggested the fs operation too but then it's more efficient to
    have it as a mm operation with fs side effects, because they don't
    immediatly know fd and physical offset of the range. It's possible to
    fixup in userland and to use the fs operation but it's more expensive,
    the vmas are already in the kernel and we can use them.

    Short term plan & Future Direction:

    - We seem to need this interface only for shmfs/tmpfs files in the short
    term. We have to add hooks into the filesystem for correctness and
    completeness. This is what this patch does.

    - In the future, plan is to support both fs and mmap apis also. This
    also involves (other) filesystem specific functions to be implemented.

    - Current patch doesn't support VM_NONLINEAR - which can be addressed in
    the future.

    Signed-off-by: Badari Pulavarty
    Cc: Hugh Dickins
    Cc: Andrea Arcangeli
    Cc: Michael Kerrisk
    Cc: Ulrich Drepper
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Badari Pulavarty
     

04 Jan, 2006

1 commit

14 Nov, 2005

2 commits

  • 8426e1f6a   [PATCH] atomic: inc_not_zero ... Browse Code »

    Introduce an atomic_inc_not_zero operation. Make this a special case of
    atomic_add_unless because lockless pagecache actually wants
    atomic_inc_not_negativeone due to its offset refcount.

    Signed-off-by: Nick Piggin
    Cc: "Paul E. McKenney"
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Nick Piggin
     
  • 4a6dae6d3   [PATCH] atomic: cmpxchg ... Browse Code »

    Introduce an atomic_cmpxchg operation.

    Signed-off-by: Nick Piggin
    Cc: "Paul E. McKenney"
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Nick Piggin
     

07 Nov, 2005

3 commits

31 Oct, 2005

1 commit