Eric Lee / smarc-fsl-linux-kernel

31 Oct, 2011

1 commit

  • 9984de1a5   kernel: Map most files to use export.h instead of module.h ... Browse Code »

    The changed files were only including linux/module.h for the
    EXPORT_SYMBOL infrastructure, and nothing else. Revector them
    onto the isolated export header for faster compile times.

    Nothing to see here but a whole lot of instances of:

    -#include
    +#include

    This commit is only changing the kernel dir; next targets
    will probably be mm, fs, the arch dirs, etc.

    Signed-off-by: Paul Gortmaker

    Paul Gortmaker
     

15 Sep, 2011

1 commit

  • 124ff4e53   async: uninitialized warning corrections ... Browse Code »

    The variables here are really not used uninitialized.

    kernel/async.c: In function 'async_synchronize_cookie_domain':
    kernel/async.c:270:10: warning: 'starttime.tv64' may be used uninitialized in this function
    kernel/async.c: In function 'async_run_entry_fn':
    kernel/async.c:122:10: warning: 'calltime.tv64' may be used uninitialized in this function

    Signed-off-by: Vitaliy Ivanov
    Signed-off-by: Konstantin Khlebnikov
    Signed-off-by: Viresh Kumar
    Signed-off-by: Jiri Kosina

    Vitaliy Ivanov
     

15 Jun, 2011

1 commit

14 Jul, 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
     

09 Jun, 2009

1 commit

  • 3af968e06   async: Fix lack of boot-time console due to insufficient synchronization ... Browse Code »

    Our async work synchronization was broken by "async: make sure
    independent async domains can't accidentally entangle" (commit
    d5a877e8dd409d8c702986d06485c374b705d340), because it would report
    the wrong lowest active async ID when there was both running and
    pending async work.

    This caused things like no being able to read the root filesystem,
    resulting in missing console devices and inability to run 'init',
    causing a boot-time panic.

    This fixes it by properly returning the lowest pending async ID: if
    there is any running async work, that will have a lower ID than any
    pending work, and we should _not_ look at the pending work list.

    There were alternative patches from Jaswinder and James, but this one
    also cleans up the code by removing the pointless 'ret' variable and
    the unnecesary testing for an empty list around 'for_each_entry()' (if
    the list is empty, the for_each_entry() thing just won't execute).

    Fixes-bug: http://bugzilla.kernel.org/show_bug.cgi?id=13474
    Reported-and-tested-by: Chris Clayton
    Cc: Jaswinder Singh Rajput
    Cc: James Bottomley
    Cc: Arjan van de Ven
    Signed-off-by: Linus Torvalds

    Linus Torvalds
     

25 May, 2009

1 commit

  • d5a877e8d   async: make sure independent async domains can't accidentally entangle ... Browse Code »

    The problem occurs when async_synchronize_full_domain() is called when
    the async_pending list is not empty. This will cause lowest_running()
    to return the cookie of the first entry on the async_pending list, which
    might be nothing at all to do with the domain being asked for and thus
    cause the domain synchronization to wait for an unrelated domain. This
    can cause a deadlock if domain synchronization is used from one domain
    to wait for another.

    Fix by running over the async_pending list to see if any pending items
    actually belong to our domain (and return their cookies if they do).

    Signed-off-by: James Bottomley
    Signed-off-by: Arjan van de Ven
    Signed-off-by: Linus Torvalds

    James Bottomley
     

29 Mar, 2009

1 commit

09 Feb, 2009

5 commits

06 Feb, 2009

1 commit

  • 58763a297   kernel/async.c: fix printk warnings ... Browse Code »

    alpha:

    kernel/async.c: In function 'run_one_entry':
    kernel/async.c:141: warning: format '%lli' expects type 'long long int', but argument 2 has type 'async_cookie_t'
    kernel/async.c:149: warning: format '%lli' expects type 'long long int', but argument 2 has type 'async_cookie_t'
    kernel/async.c:149: warning: format '%lld' expects type 'long long int', but argument 4 has type 's64'
    kernel/async.c: In function 'async_synchronize_cookie_special':
    kernel/async.c:250: warning: format '%lli' expects type 'long long int', but argument 3 has type 's64'

    Cc: Arjan van de Ven
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Andrew Morton
     

13 Jan, 2009

1 commit

  • 37a76bd4f   async: fix __lowest_in_progress() ... Browse Code »

    At 37000 feet somewhere near Greenland I woke up from a half-sleep with the
    realisation that __lowest_in_progress() is buggy. After landing I checked
    and there were indeed 2 problems with it; this patch fixes both:
    * The order of the list checks was wrong
    * The locking was not correct.

    Signed-off-by: Arjan van de Ven
    Signed-off-by: Linus Torvalds

    Arjan van de Ven
     

10 Jan, 2009

1 commit

09 Jan, 2009

1 commit

  • 33b04b930   async: make async_synchronize_full() more serializing ... Browse Code »

    turns out that there are real problems with allowing async
    tasks that are scheduled from async tasks to run after
    the async_synchronize_full() returns.

    This patch makes the _full more strict and a complete
    synchronization. Later I might need to add back a lighter
    form of synchronization for other uses.. but not right now.

    Signed-off-by: Arjan van de Ven
    Signed-off-by: Linus Torvalds

    Arjan van de Ven
     

08 Jan, 2009

2 commits

  • ad160d231   async: don't do the initcall stuff post boot ... Browse Code »

    while tracking the asynchronous calls during boot using the initcall_debug
    convention is useful, doing it once the kernel is done is actually
    bad now that we use asynchronous operations post boot as well...

    Signed-off-by: Arjan van de Ven

    Arjan van de Ven
     
  • 22a9d6456   async: Asynchronous function calls to speed up kernel boot ... Browse Code »

    Right now, most of the kernel boot is strictly synchronous, such that
    various hardware delays are done sequentially.

    In order to make the kernel boot faster, this patch introduces
    infrastructure to allow doing some of the initialization steps
    asynchronously, which will hide significant portions of the hardware delays
    in practice.

    In order to not change device order and other similar observables, this
    patch does NOT do full parallel initialization.

    Rather, it operates more in the way an out of order CPU does; the work may
    be done out of order and asynchronous, but the observable effects
    (instruction retiring for the CPU) are still done in the original sequence.

    Signed-off-by: Arjan van de Ven

    Arjan van de Ven