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  1. 14 2月, 2007 1 次提交
  3. 12 2月, 2007 1 次提交
    • C
      [PATCH] Set CONFIG_ZONE_DMA for arches with GENERIC_ISA_DMA · 5ac6da66
      由 Christoph Lameter 提交于 
      As Andi pointed out: CONFIG_GENERIC_ISA_DMA only disables the ISA DMA
channel management.  Other functionality may still expect GFP_DMA to
provide memory below 16M.  So we need to make sure that CONFIG_ZONE_DMA is
set independent of CONFIG_GENERIC_ISA_DMA.  Undo the modifications to
mm/Kconfig where we made ZONE_DMA dependent on GENERIC_ISA_DMA and set
theses explicitly in each arches Kconfig.

Reviews must occur for each arch in order to determine if ZONE_DMA can be
switched off.  It can only be switched off if we know that all devices
supported by a platform are capable of performing DMA transfers to all of
memory (Some arches already support this: uml, avr32, sh sh64, parisc and
IA64/Altix).

In order to switch ZONE_DMA off conditionally, one would have to establish
a scheme by which one can assure that no drivers are enabled that are only
capable of doing I/O to a part of memory, or one needs to provide an
alternate means of performing an allocation from a specific range of memory
(like provided by alloc_pages_range()) and insure that all drivers use that
call.  In that case the arches alloc_dma_coherent() may need to be modified
to call alloc_pages_range() instead of relying on GFP_DMA.
Signed-off-by: NChristoph Lameter <clameter@sgi.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      5ac6da66
  5. 11 2月, 2007 1 次提交
  7. 10 2月, 2007 1 次提交
  9. 07 2月, 2007 2 次提交
  11. 24 1月, 2007 1 次提交
    • R
      [MIPS] SMTC: Instant IPI replay. · ac8be955
      由 Ralf Baechle 提交于 
      SMTC pseudo-interrupts between TCs are deferred and queued if the target
TC is interrupt-inhibited (IXMT). In the first SMTC prototypes, these
queued IPIs were serviced on return to user mode, or on entry into the
kernel idle loop. The INSTANT_REPLAY option dispatches them as part of
local_irq_restore() processing, which adds runtime overhead (hence the
option to turn it off), but ensures that IPIs are handled promptly even
under heavy I/O interrupt load.
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
      ac8be955
  13. 09 12月, 2006 4 次提交
  15. 07 12月, 2006 1 次提交
    • F
      [MIPS] Compile __do_IRQ() when really needed · e77c232c
      由 Franck Bui-Huu 提交于 
      __do_IRQ() is needed only by irq handlers that can't use
default handlers defined in kernel/irq/chip.c.

For others platforms there's no need to compile this function
since it won't be used. For those platforms this patch defines
GENERIC_HARDIRQS_NO__DO_IRQ symbol which is used exactly for
this purpose.

Futhermore for platforms which do not use __do_IRQ(), end()
method which is part of the 'irq_chip' structure is not used.
This patch simply removes this method in this case.
Signed-off-by: NFranck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
      e77c232c
  17. 05 12月, 2006 3 次提交
  19. 30 11月, 2006 3 次提交
  21. 03 11月, 2006 3 次提交
  23. 31 10月, 2006 2 次提交
  25. 10 10月, 2006 1 次提交
  27. 08 10月, 2006 1 次提交
  29. 05 10月, 2006 1 次提交
  31. 04 10月, 2006 2 次提交
  33. 02 10月, 2006 2 次提交
  35. 27 9月, 2006 5 次提交
  37. 14 7月, 2006 4 次提交
  39. 30 6月, 2006 1 次提交