Eric Lee / smarc-fsl-linux-kernel

28 Oct, 2010

1 commit

30 Mar, 2010

1 commit

  • 5a0e3ad6a   include cleanup: Update gfp.h and slab.h includes to prepare for breaking implic… ... Browse Code »

    …it slab.h inclusion from percpu.h

    percpu.h is included by sched.h and module.h and thus ends up being
    included when building most .c files. percpu.h includes slab.h which
    in turn includes gfp.h making everything defined by the two files
    universally available and complicating inclusion dependencies.

    percpu.h -> slab.h dependency is about to be removed. Prepare for
    this change by updating users of gfp and slab facilities include those
    headers directly instead of assuming availability. As this conversion
    needs to touch large number of source files, the following script is
    used as the basis of conversion.

    http://userweb.kernel.org/~tj/misc/slabh-sweep.py

    The script does the followings.

    * Scan files for gfp and slab usages and update includes such that
    only the necessary includes are there. ie. if only gfp is used,
    gfp.h, if slab is used, slab.h.

    * When the script inserts a new include, it looks at the include
    blocks and try to put the new include such that its order conforms
    to its surrounding. It's put in the include block which contains
    core kernel includes, in the same order that the rest are ordered -
    alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
    doesn't seem to be any matching order.

    * If the script can't find a place to put a new include (mostly
    because the file doesn't have fitting include block), it prints out
    an error message indicating which .h file needs to be added to the
    file.

    The conversion was done in the following steps.

    1. The initial automatic conversion of all .c files updated slightly
    over 4000 files, deleting around 700 includes and adding ~480 gfp.h
    and ~3000 slab.h inclusions. The script emitted errors for ~400
    files.

    2. Each error was manually checked. Some didn't need the inclusion,
    some needed manual addition while adding it to implementation .h or
    embedding .c file was more appropriate for others. This step added
    inclusions to around 150 files.

    3. The script was run again and the output was compared to the edits
    from #2 to make sure no file was left behind.

    4. Several build tests were done and a couple of problems were fixed.
    e.g. lib/decompress_*.c used malloc/free() wrappers around slab
    APIs requiring slab.h to be added manually.

    5. The script was run on all .h files but without automatically
    editing them as sprinkling gfp.h and slab.h inclusions around .h
    files could easily lead to inclusion dependency hell. Most gfp.h
    inclusion directives were ignored as stuff from gfp.h was usually
    wildly available and often used in preprocessor macros. Each
    slab.h inclusion directive was examined and added manually as
    necessary.

    6. percpu.h was updated not to include slab.h.

    7. Build test were done on the following configurations and failures
    were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
    distributed build env didn't work with gcov compiles) and a few
    more options had to be turned off depending on archs to make things
    build (like ipr on powerpc/64 which failed due to missing writeq).

    * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
    * powerpc and powerpc64 SMP allmodconfig
    * sparc and sparc64 SMP allmodconfig
    * ia64 SMP allmodconfig
    * s390 SMP allmodconfig
    * alpha SMP allmodconfig
    * um on x86_64 SMP allmodconfig

    8. percpu.h modifications were reverted so that it could be applied as
    a separate patch and serve as bisection point.

    Given the fact that I had only a couple of failures from tests on step
    6, I'm fairly confident about the coverage of this conversion patch.
    If there is a breakage, it's likely to be something in one of the arch
    headers which should be easily discoverable easily on most builds of
    the specific arch.

    Signed-off-by: Tejun Heo <tj@kernel.org>
    Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>

    Tejun Heo
     

07 Jul, 2007

1 commit

09 May, 2007

1 commit

  • af7c693f1   Cap shmmax at INT_MAX in compat shminfo ... Browse Code »

    The value of shmmax may be larger than will fit in the struct used by
    the 32bit compat version of sys_shmctl. This change mirrors what the
    normal sys_shmctl does when called with the old IPC_INFO command.

    Signed-off-by: Guy Streeter
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Guy Streeter
     

08 Dec, 2006

1 commit

  • 651971cb7   [PATCH] Fix the size limit of compat space msgsize ... Browse Code »

    Currently we allocate 64k space on the user stack and use it the msgbuf for
    sys_{msgrcv,msgsnd} for compat and the results are later copied in user [
    by copy_in_user]. This patch introduces helper routines for
    sys_{msgrcv,msgsnd} as below:

    do_msgsnd() : Accepts the mtype and user space ptr to the buffer along with
    the msqid and msgflg.

    do_msgrcv() : Accepts a kernel space ptr to mtype and a userspace ptr to
    the buffer. The mtype has to be copied back the user space msgbuf by the
    caller.

    These changes avoid the need to allocate the msgsize on the userspace (
    thus removing the size limt ) and the overhead of an extra copy_in_user().

    Signed-off-by: Suzuki K P
    Cc: Arnd Bergmann
    Cc: "David S. Miller"
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    suzuki
     

01 Jul, 2006

1 commit

27 Mar, 2006

1 commit

  • 5f921ae96   [PATCH] sem2mutex: ipc, id.sem ... Browse Code »

    Semaphore to mutex conversion.

    The conversion was generated via scripts, and the result was validated
    automatically via a script as well.

    Signed-off-by: Ingo Molnar
    Cc: Manfred Spraul
    Signed-off-by: Lee Schermerhorn
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Ingo Molnar
     

08 Sep, 2005

1 commit

  • 202e5979a   [PATCH] compat: be more consistent about [ug]id_t ... Browse Code »

    When I first wrote the compat layer patches, I was somewhat cavalier about
    the definition of compat_uid_t and compat_gid_t (or maybe I just
    misunderstood :-)). This patch makes the compat types much more consistent
    with the types we are being compatible with and hopefully will fix a few
    bugs along the way.

    compat type type in compat arch
    __compat_[ug]id_t __kernel_[ug]id_t
    __compat_[ug]id32_t __kernel_[ug]id32_t
    compat_[ug]id_t [ug]id_t

    The difference is that compat_uid_t is always 32 bits (for the archs we
    care about) but __compat_uid_t may be 16 bits on some.

    Signed-off-by: Stephen Rothwell
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Stephen Rothwell
     

08 Jul, 2005

1 commit

  • 214a627cb   [PATCH] put_compat_shminfo() warning fix ... Browse Code »

    GCC 4 complains because the function put_compat_shminfo() can't get to its
    return statement if there is no error... If the function does not return
    -EFAULT, it doesn't return anything at all. Looks like a typo.

    Signed-off-by: Jesse Millan
    Signed-off-by: Domen Puncer
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Jesse Millan
     

17 Apr, 2005

1 commit

  • 1da177e4c   Linux-2.6.12-rc2 ... Browse Code »

    Initial git repository build. I'm not bothering with the full history,
    even though we have it. We can create a separate "historical" git
    archive of that later if we want to, and in the meantime it's about
    3.2GB when imported into git - space that would just make the early
    git days unnecessarily complicated, when we don't have a lot of good
    infrastructure for it.

    Let it rip!

    Linus Torvalds