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Benjamin Herrenschmidt 84532a0fc3 Revert "powerpc: Rework dma-noncoherent to use generic vmalloc layer" 
This reverts commit 33f00dcedb.

    While it was a good idea to try to use the mm/vmalloc.c allocator instead
    of our own (in fact, ours is itself a dup on an old variant of the vmalloc
    one), unfortunately, the approach is terminally busted since
    dma_alloc_coherent() can be called at interrupt time or in atomic contexts
    and there's little chances we'll make the code in mm/vmalloc.c cope with\       that :-(

    Until we can get the generic code to forbid that idiocy and fix all
    drivers abusing it, we pretty much have no choice but revert to
    our custom virtual space allocator.

    There's also a problem with SMP safety since freeing such mapping
    would require an IPI which cannot be done at interrupt time.

    However, right now, I don't think we support any platform that is
    both SMP and has non-coherent DMA (don't laugh, I know such things
    do exist !) so we can sort that out later.

    Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
 		2009-05-27 13:33:14 +10:00
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boot Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2009-05-15 08:05:02 -07:00
configs powerpc/ps3: Update ps3_defconfig 2009-05-18 15:19:05 +10:00
include/asm Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2009-05-15 08:05:02 -07:00
kernel powerpc: Explicit alignment for .data.cacheline_aligned 2009-05-18 15:19:05 +10:00
kvm
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lib Revert "powerpc: Rework dma-noncoherent to use generic vmalloc layer" 2009-05-27 13:33:14 +10:00
math-emu
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mm powerpc/mm: Fix broken MMU PID stealing on !SMP 2009-05-26 13:46:49 +10:00
oprofile powerpc: Fix oprofile sampling of marked events on POWER7 2009-05-15 16:43:41 +10:00
platforms powerpc/maple: Add a quirk to disable MSI for IPR on Bimini 2009-05-22 16:01:11 +10:00
sysdev powerpc/mpic: Fix incorrect allocation of interrupt rev-map 2009-05-15 16:43:41 +10:00
xmon
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Kconfig Revert "powerpc: Rework dma-noncoherent to use generic vmalloc layer" 2009-05-27 13:33:14 +10:00
Kconfig.debug
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Makefile
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