]> pilppa.com Git - linux-2.6-omap-h63xx.git/commit
[AGP] Allocate AGP pages with GFP_DMA32 by default
authorLinus Torvalds <torvalds@woody.osdl.org>
Wed, 22 Nov 2006 22:55:29 +0000 (14:55 -0800)
committerLinus Torvalds <torvalds@woody.osdl.org>
Wed, 22 Nov 2006 22:55:29 +0000 (14:55 -0800)
commit66c669baa7d70b8d135da67f36c8dba12cea71b8
tree8839924101a47a08d9da70f9bfcd8abb4023e466
parent7d915a38985d2826acbdc9dc9cca8a93e23e5278
[AGP] Allocate AGP pages with GFP_DMA32 by default

Not all graphic page remappers support physical addresses over the 4GB
mark for remapping, so while some do (the AMD64 GART always did, and I
just fixed the i965 to do so properly), we're safest off just forcing
GFP_DMA32 allocations to make sure graphics pages get allocated in the
low 32-bit address space by default.

AGP sub-drivers that really care, and can do better, could just choose
to implement their own allocator (or we could add another "64-bit safe"
default allocator for their use), but quite frankly, you're not likely
to care in practice.

So for now, this trivial change means that we won't be allocating pages
that we can't map correctly by mistake on x86-64.

[ On traditional 32-bit x86, this could never happen, because GFP_KERNEL
  would never allocate any highmem memory anyway ]

Acked-by: Andi Kleen <ak@suse.de>
Acked-by: Dave Jones <davej@redhat.com>
Cc: Eric Anholt <eric@anholt.net>
Cc: Keith Packard <keithp@keithp.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
drivers/char/agp/generic.c
drivers/char/agp/intel-agp.c