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  1. 30 3月, 2010 1 次提交
    • T
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking... · 5a0e3ad6
      由 Tejun Heo 提交于 
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit 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: NTejun Heo <tj@kernel.org>
Guess-its-ok-by: NChristoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
      5a0e3ad6
  3. 18 1月, 2009 1 次提交
  5. 06 12月, 2008 1 次提交
  7. 30 9月, 2008 1 次提交
  9. 31 7月, 2008 1 次提交
    • V
      IB/ipath: Use unsigned long for irq flags · 52fd8ca6
      由 Vegard Nossum 提交于 
      A few functions in the ipath driver incorrectly use unsigned int to
hold irq flags for spin_lock_irqsave().

This patch was generated using the Coccinelle framework with the
following semantic patch:

The semantic patch I used was this:

@@
expression lock;
identifier flags;
expression subclass;
@@

- unsigned int flags;
+ unsigned long flags;

...

<+...

(
 spin_lock_irqsave(lock, flags)
|
 _spin_lock_irqsave(lock)
|
 spin_unlock_irqrestore(lock, flags)
|
 _spin_unlock_irqrestore(lock, flags)
|
 read_lock_irqsave(lock, flags)
|
 _read_lock_irqsave(lock)
|
 read_unlock_irqrestore(lock, flags)
|
 _read_unlock_irqrestore(lock, flags)
|
 write_lock_irqsave(lock, flags)
|
 _write_lock_irqsave(lock)
|
 write_unlock_irqrestore(lock, flags)
|
 _write_unlock_irqrestore(lock, flags)
|
 spin_lock_irqsave_nested(lock, flags, subclass)
|
 _spin_lock_irqsave_nested(lock, subclass)
|
 spin_unlock_irqrestore(lock, flags)
|
 _spin_unlock_irqrestore(lock, flags)
|
 _raw_spin_lock_flags(lock, flags)
|
 __raw_spin_lock_flags(lock, flags)
)

...+>

Cc: Ralph Campbell <ralph.campbell@qlogic.com>
Cc: Julia Lawall <julia@diku.dk>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: NVegard Nossum <vegard.nossum@gmail.com>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      52fd8ca6
  11. 15 7月, 2008 1 次提交
    • R
      IB/ipath: Use IEEE OUI for vendor_id reported by ibv_query_device() · df866619
      由 Ralph Campbell 提交于 
      The IB spe. for SubnGet(NodeInfo) and query HCA says that the vendor
ID field should be the IEEE OUI assigned to the vendor.  The ipath
driver was returning the PCI vendor ID instead.  This will affect
applications which call ibv_query_device().  The old value was
0x001fc1 or 0x001077, the new value is 0x001175.

The vendor ID doesn't appear to be exported via /sys so that should
reduce possible compatibility issues.  I'm only aware of Open MPI as a
major application which depends on this change, and they have made
necessary adjustments.
Signed-off-by: NRalph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      df866619
  13. 27 5月, 2008 1 次提交
  15. 19 5月, 2008 1 次提交
  17. 14 5月, 2008 2 次提交
  19. 08 5月, 2008 1 次提交
  21. 22 4月, 2008 3 次提交
  23. 20 4月, 2008 1 次提交
  25. 17 4月, 2008 5 次提交
  27. 26 1月, 2008 3 次提交
  29. 21 11月, 2007 1 次提交
  31. 10 10月, 2007 5 次提交
  33. 18 7月, 2007 1 次提交
    • R
      IB/ipath: Make a few functions static · da9aec7b
      由 Roland Dreier 提交于 
      Make some functions that are only used in a single .c file static.  In
addition to being a cleanup, this shrinks the generated code.  On x86_64:

add/remove: 1/3 grow/shrink: 2/1 up/down: 4777/-4956 (-179)
function                                     old     new   delta
handle_errors                                  -    3994   +3994
__verbs_timer                                 42     710    +668
ipath_do_ruc_send                           2131    2246    +115
ipath_no_bufs_available                      136       -    -136
ipath_disarm_senderrbufs                     639       -    -639
ipath_ib_timer                               658       -    -658
ipath_intr                                  5878    2355   -3523
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      da9aec7b
  35. 10 7月, 2007 7 次提交
  37. 15 5月, 2007 1 次提交
    • A
      IB/ipath: Shadow the gpio_mask register · 8f140b40
      由 Arthur Jones 提交于 
      Once upon a time, GPIO interrupts were rare.  But then a chip bug in
the waldo series forced the use of a GPIO interrupt to signal packet
reception.  This greatly increased the frequency of GPIO interrupts
which have the gpio_mask bits set on the waldo chips.  Other bits in
the gpio_status register are used for I2C clock and data lines, these
bits are usually on.  An "unlikely" annotation leftover from the old
days was improperly applied to these bits, and an unnecessary chip
mmio read was being accessed in the interrupt fast path on waldo.

Remove the stagnant unlikely annotation in the interrupt handler and
keep a shadow copy of the gpio_mask register to avoid the slow mmio
read when testing for interruptable GPIO bits.
Signed-off-by: NArthur Jones <arthur.jones@qlogic.com>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      8f140b40
  39. 07 5月, 2007 1 次提交
    • M
      IB: Add CQ comp_vector support · f4fd0b22
      由 Michael S. Tsirkin 提交于 
      Add a num_comp_vectors member to struct ib_device and extend
ib_create_cq() to pass in a comp_vector parameter -- this parallels
the userspace libibverbs API.  Update all hardware drivers to set
num_comp_vectors to 1 and have all ULPs pass 0 for the comp_vector
value.  Pass the value of num_comp_vectors to userspace rather than
hard-coding a value of 1.

We want multiple CQ event vector support (via MSI-X or similar for
adapters that can generate multiple interrupts), but it's not clear
how many vectors we want, or how we want to deal with policy issues
such as how to decide which vector to use or how to set up interrupt
affinity.  This patch is useful for experimenting, since no core
changes will be necessary when updating a driver to support multiple
vectors, and we know that we want to make at least these changes
anyway.
Signed-off-by: NMichael S. Tsirkin <mst@dev.mellanox.co.il>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      f4fd0b22
  41. 01 5月, 2007 1 次提交