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  1. 02 Oct, 2007 1 commit
  3. 17 Sep, 2007 1 commit
  5. 11 Jul, 2007 1 commit
  7. 20 Feb, 2007 1 commit
  9. 11 Feb, 2007 1 commit
    • Christoph Lameter's avatar
      [PATCH] Set CONFIG_ZONE_DMA for arches with GENERIC_ISA_DMA · 5ac6da66
      Christoph Lameter authored 
      
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: default avatarChristoph Lameter <clameter@sgi.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      5ac6da66
  11. 24 Jan, 2007 1 commit
  13. 12 Dec, 2006 1 commit
  15. 08 Dec, 2006 2 commits
    • David Howells's avatar
      [PATCH] LOG2: Implement a general integer log2 facility in the kernel · f0d1b0b3
      David Howells authored 
      
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: default avatarDavid 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: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      f0d1b0b3
    • Judith Lebzelter's avatar
      [PATCH] use generic BUG for ppc · a8605aef
      Judith Lebzelter authored 
      
Switch ppc over to using the generic BUG implementation.
Signed-off-by: default avatarJudith 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: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      a8605aef
  17. 04 Dec, 2006 1 commit
  19. 30 Nov, 2006 1 commit
  21. 03 Oct, 2006 1 commit
    • Matt LaPlante's avatar
      Attack of "the the"s in arch · 4b3f686d
      Matt LaPlante authored 
      
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: default avatarAdrian Bunk <bunk@stusta.de>
      4b3f686d
  23. 27 Sep, 2006 1 commit
  25. 13 Sep, 2006 1 commit
  27. 29 Jun, 2006 1 commit
  29. 24 May, 2006 1 commit
  31. 27 Mar, 2006 2 commits
  33. 26 Mar, 2006 1 commit
  35. 07 Feb, 2006 1 commit
  37. 15 Jan, 2006 1 commit
    • Paul Mackerras's avatar
      [PATCH] ppc: Remove powermac support from ARCH=ppc · a7fdd90b
      Paul Mackerras authored 
      
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: default avatarPaul Mackerras <paulus@samba.org>
      a7fdd90b
  39. 11 Jan, 2006 1 commit
  41. 09 Jan, 2006 1 commit
  43. 05 Dec, 2005 1 commit
    • Paul Mackerras's avatar
      ppc: Build in all three of powermac, PREP and CHRP support · b6d78157
      Paul Mackerras authored 
      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: default avatarPaul Mackerras <paulus@samba.org>
      b6d78157
  45. 07 Nov, 2005 2 commits
  47. 26 Oct, 2005 2 commits
  49. 21 Sep, 2005 3 commits
  51. 18 Sep, 2005 1 commit
  53. 15 Sep, 2005 1 commit
    • David S. Miller's avatar
      [LIB]: Consolidate _atomic_dec_and_lock() · 4db2ce01
      David S. Miller authored 
      
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: default avatarDavid S. Miller <davem@davemloft.net>
      4db2ce01
  55. 10 Sep, 2005 1 commit
    • Paul Mackerras's avatar
      [PATCH] ppc32: support hotplug cpu on powermacs · 31139971
      Paul Mackerras authored 
      
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: default avatarPaul Mackerras <paulus@samba.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      31139971
  57. 09 Sep, 2005 1 commit
  59. 08 Sep, 2005 1 commit
    • viro@ZenIV.linux.org.uk's avatar
      [PATCH] Kconfig fix (BLK_DEV_FD dependencies) · a08b6b79
      viro@ZenIV.linux.org.uk authored 
      
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: default avatarAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      a08b6b79
  61. 05 Sep, 2005 4 commits
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