Doug / smarc-fsl-linux-kernel

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
     

21 Sep, 2009

1 commit

28 Apr, 2008

1 commit

  • e4c690e06   fb: add support for foreign endianness ... Browse Code »

    Add support for the framebuffers with non-native endianness. This is done via
    FBINFO_FOREIGN_ENDIAN flag that will be used by the drivers. Depending on the
    host endianness this flag will be overwritten by FBINFO_BE_MATH internal flag,
    or cleared.

    Tested to work on MPC8360E-RDK (BE) + Fujitsu MINT framebuffer (LE).

    Signed-off-by: Anton Vorontsov
    Cc: "Antonino A. Daplas"
    Cc: Benjamin Herrenschmidt
    Cc: Paul Mackerras
    Cc:
    Cc: Clemens Koller
    Cc: Krzysztof Helt
    Cc: Geert Uytterhoeven
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Anton Vorontsov
     

17 Oct, 2007

2 commits

  • 15afdd433   fbdev: copyarea function taught to fully support swapped pixel order in byte ... Browse Code »

    This correct case, when source and destination X coordinates difference is n
    multiple of pixels in byte. This is probably rare case, but this case should
    supported for completeness.

    Reorganization of FB_READL and FB_WRITEL calls results in code size decrease
    for normal build without swapping support and size with support enabled is
    reasonable too.

    [adaplas]
    Add missing fb_rev_pixels_in_long() prototype.

    Signed-off-by: Pavel Pisa
    Signed-off-by: Antonino Daplas
    [akpm@linux-foundation.org: coding-style fixes]
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Pavel Pisa
     
  • 779121e9f   fbdev: Support for byte-reversed framebuffer formats ... Browse Code »

    Allow generic frame-buffer code to correctly write texts and blit images for
    1, 2 and 4 bit per pixel frame-buffer organizations when pixels in bytes are
    organized to in opposite order than bytes in long type.

    Overhead should be reasonable. If option is not selected, than compiler
    should eliminate completely all overhead.

    The feature is disabled at compile time if CONFIG_FB_CFB_REV_PIXELS_IN_BYTE is
    not set.

    [adaplas]
    Convert helper functions to macros if feature is not enabled.

    Signed-off-by: Pavel Pisa
    Signed-off-by: Antonino Daplas
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Pavel Pisa
     

09 May, 2007

1 commit

01 Jul, 2006

1 commit

13 Dec, 2005

1 commit

  • be0d9b6c7   [PATCH] fbdev: Fix incorrect unaligned access in little-endian machines ... Browse Code »

    The drawing function cfbfillrect does not work correctly when access is not
    unsigned-long aligned. It manifests as extra lines of pixels that are not
    complete drawn. Reversing the shift operator solves the problem, so I would
    presume that this bug would manifest only on little endian machines. The
    function cfbcopyarea may also have this bug.

    Aligned access should present no problems.

    Signed-off-by: Antonino Daplas
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Antonino A. Daplas
     

07 Nov, 2005

1 commit

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