Eric Lee / smarc-fsl-linux-kernel

31 Mar, 2011

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
     

04 Nov, 2007

1 commit

  • ebab89909   NTFS: Fix read regression. ... Browse Code »

    The regression was caused by:
    commit[a32ea1e1f925399e0d81ca3f7394a44a6dafa12c] Fix read/truncate race

    This causes ntfs_readpage() to be called for a zero i_size inode, which
    failed when the file was compressed and non-resident.

    Thanks a lot to Mike Galbraith for reporting the issue and tracking down
    the commit that caused the regression.

    Looking into it I found three bugs which the patch fixes.

    Signed-off-by: Anton Altaparmakov
    Tested-by: Mike Galbraith
    Signed-off-by: Linus Torvalds

    Anton Altaparmakov
     

13 Oct, 2007

1 commit

  • bfab36e81   NTFS: Fix a mount time deadlock. ... Browse Code »

    Big thanks go to Mathias Kolehmainen for reporting the bug, providing
    debug output and testing the patches I sent him to get it working.

    The fix was to stop calling ntfs_attr_set() at mount time as that causes
    balance_dirty_pages_ratelimited() to be called which on systems with
    little memory actually tries to go and balance the dirty pages which tries
    to take the s_umount semaphore but because we are still in fill_super()
    across which the VFS holds s_umount for writing this results in a
    deadlock.

    We now do the dirty work by hand by submitting individual buffers. This
    has the annoying "feature" that mounting can take a few seconds if the
    journal is large as we have clear it all. One day someone should improve
    on this by deferring the journal clearing to a helper kernel thread so it
    can be done in the background but I don't have time for this at the moment
    and the current solution works fine so I am leaving it like this for now.

    Signed-off-by: Anton Altaparmakov
    Signed-off-by: Linus Torvalds

    Anton Altaparmakov
     

08 May, 2007

1 commit

  • 6fe6900e1   mm: make read_cache_page synchronous ... Browse Code »

    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: Nick Piggin
    Cc: Hugh Dickins
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Nick Piggin
     

13 Feb, 2007

1 commit

08 Dec, 2006

1 commit

01 Oct, 2006

1 commit

23 Jun, 2006

1 commit

  • 090d2b185   [PATCH] read_mapping_page for address space ... Browse Code »

    Add read_mapping_page() which is used for callers that pass
    mapping->a_ops->readpage as the filler for read_cache_page. This removes
    some duplication from filesystem code.

    Signed-off-by: Pekka Enberg
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Pekka Enberg
     

23 Mar, 2006

3 commits

10 Jan, 2006

1 commit

24 Oct, 2005

1 commit

19 Oct, 2005

1 commit

11 Oct, 2005

1 commit

04 Oct, 2005

6 commits

09 Sep, 2005

3 commits

26 Jun, 2005

4 commits

27 May, 2005

1 commit

05 May, 2005

9 commits

04 May, 2005

1 commit