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  1. 17 10月, 2007 1 次提交
  3. 03 10月, 2007 2 次提交
  5. 17 9月, 2007 1 次提交
  7. 12 7月, 2007 1 次提交
  9. 21 2月, 2007 1 次提交
  11. 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
  13. 24 1月, 2007 1 次提交
  15. 13 12月, 2006 1 次提交
  17. 09 12月, 2006 2 次提交
    • D
      [PATCH] LOG2: Implement a general integer log2 facility in the kernel · f0d1b0b3
      由 David Howells 提交于 
      This facility provides three entry points:

	ilog2()		Log base 2 of unsigned long
	ilog2_u32()	Log base 2 of u32
	ilog2_u64()	Log base 2 of u64

These facilities can either be used inside functions on dynamic data:

	int do_something(long q)
	{
		...;
		y = ilog2(x)
		...;
	}

Or can be used to statically initialise global variables with constant values:

	unsigned n = ilog2(27);

When performing static initialisation, the compiler will report "error:
initializer element is not constant" if asked to take a log of zero or of
something not reducible to a constant.  They treat negative numbers as
unsigned.

When not dealing with a constant, they fall back to using fls() which permits
them to use arch-specific log calculation instructions - such as BSR on
x86/x86_64 or SCAN on FRV - if available.

[akpm@osdl.org: MMC fix]
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: David Howells <dhowells@redhat.com>
Cc: Wojtek Kaniewski <wojtekka@toxygen.net>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      f0d1b0b3
    • J
      [PATCH] use generic BUG for ppc · a8605aef
      由 Judith Lebzelter 提交于 
      Switch ppc over to using the generic BUG implementation.
Signed-off-by: NJudith Lebzelter <judith@osdl.org>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Michael Ellerman <michael@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      a8605aef
  19. 04 12月, 2006 1 次提交
  21. 30 11月, 2006 1 次提交
  23. 04 10月, 2006 1 次提交
    • M
      Attack of "the the"s in arch · 4b3f686d
      由 Matt LaPlante 提交于 
      The patch below corrects multiple occurances of "the the"
typos across several files, both in source comments and KConfig files.
There is no actual code changed, only text.  Note this only affects the /arch
directory, and I believe I could find many more elsewhere. :)
Signed-off-by: NAdrian Bunk <bunk@stusta.de>
      4b3f686d
  25. 27 9月, 2006 1 次提交
  27. 13 9月, 2006 1 次提交
  29. 30 6月, 2006 1 次提交
  31. 24 5月, 2006 1 次提交
  33. 28 3月, 2006 1 次提交
    • P
      ppc: Remove CHRP, POWER3 and POWER4 support from arch/ppc · 0a26b136
      由 Paul Mackerras 提交于 
      32-bit CHRP machines are now supported only in arch/powerpc, as are
all 64-bit PowerPC processors.  This means that we don't use
Open Firmware on any platform in arch/ppc any more.

This makes PReP support a single-platform option like every other
platform support option in arch/ppc now, thus CONFIG_PPC_MULTIPLATFORM
is gone from arch/ppc.  CONFIG_PPC_PREP is the option that selects
PReP support and is generally what has replaced
CONFIG_PPC_MULTIPLATFORM within arch/ppc.

_machine is all but dead now, being #defined to 0.

Updated Makefiles, comments and Kconfig options generally to reflect
these changes.
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      0a26b136
  35. 27 3月, 2006 2 次提交
  37. 07 2月, 2006 1 次提交
  39. 15 1月, 2006 1 次提交
    • P
      [PATCH] ppc: Remove powermac support from ARCH=ppc · a7fdd90b
      由 Paul Mackerras 提交于 
      This makes it possible to build kernels for PReP and/or CHRP
with ARCH=ppc by removing the (non-building) powermac support.
It's now also possible to select PReP and CHRP independently.
Powermac users should now build with ARCH=powerpc instead of
ARCH=ppc.  (This does mean that it is no longer possible to
build a 32-bit kernel for a G5.)
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      a7fdd90b
  41. 11 1月, 2006 1 次提交
  43. 09 1月, 2006 1 次提交
  45. 05 12月, 2005 1 次提交
    • P
      ppc: Build in all three of powermac, PREP and CHRP support · b6d78157
      由 Paul Mackerras 提交于 
      This reverts commit da0825fd, making
it so that if you select CONFIG_PPC_MULTIPLATFORM you get support
for PMAC, PREP and CHRP built in.

The reason for not allowing PMAC, PREP and CHRP to be selected
individually for ARCH=ppc is that there is too much interdependency
between them in the platform support code.  For example, CHRP uses
the PMAC nvram code.

Configuring with ARCH=powerpc does allow you to select support for
PMAC and CHRP separately.  Support for PREP is not there yet but
should be there soon.
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      b6d78157
  47. 07 11月, 2005 2 次提交
  49. 26 10月, 2005 2 次提交
  51. 21 9月, 2005 3 次提交
  53. 19 9月, 2005 1 次提交
  55. 15 9月, 2005 1 次提交
    • D
      [LIB]: Consolidate _atomic_dec_and_lock() · 4db2ce01
      由 David S. Miller 提交于 
      Several implementations were essentialy a common piece of C code using
the cmpxchg() macro.  Put the implementation in one spot that everyone
can share, and convert sparc64 over to using this.

Alpha is the lone arch-specific implementation, which codes up a
special fast path for the common case in order to avoid GP reloading
which a pure C version would require.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      4db2ce01
  57. 11 9月, 2005 1 次提交
    • P
      [PATCH] ppc32: support hotplug cpu on powermacs · 31139971
      由 Paul Mackerras 提交于 
      This allows cpus to be off-lined on 32-bit SMP powermacs.  When a cpu
is off-lined, it is put into sleep mode with interrupts disabled.  It
can be on-lined again by asserting its soft-reset pin, which is
connected to a GPIO pin.

With this I can off-line the second cpu in my dual G4 powermac, which
means that I can then suspend the machine (the suspend/resume code
refuses to suspend if more than one cpu is online, and making it cope
with multiple cpus is surprisingly messy).
Signed-off-by: NPaul Mackerras <paulus@samba.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      31139971
  59. 10 9月, 2005 1 次提交
  61. 08 9月, 2005 1 次提交
    • V
      [PATCH] Kconfig fix (BLK_DEV_FD dependencies) · a08b6b79
      由 viro@ZenIV.linux.org.uk 提交于 
      Sanitized and fixed floppy dependencies: split the messy dependencies for
BLK_DEV_FD by introducing a new symbol (ARCH_MAY_HAVE_PC_FDC), making
BLK_DEV_FD depend on that one and taking declarations of ARCH_MAY_HAVE_PC_FDC
to arch/*/Kconfig.  While we are at it, fixed several obvious cases when
BLK_DEV_FD should have been excluded (architectures lacking asm/floppy.h
are *not* going to have floppy.c compile, let alone work).

If you can come up with better name for that ("this architecture might
have working PC-compatible floppy disk controller"), you are more than
welcome - just s/ARCH_MAY_HAVE_PC_FDC/your_prefered_name/g in the patch
below...
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      a08b6b79
  63. 05 9月, 2005 2 次提交