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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
..
alloc.c
checksum_32.S
checksum_64.S
code-patching.c PAGE_ALIGN(): correctly handle 64-bit values on 32-bit architectures 2008-07-24 10:47:21 -07:00
copy_32.S
copypage_64.S powerpc: New copy_4K_page() 2008-09-15 11:07:42 -07:00
copyuser_64.S powerpc: Fix 64bit __copy_tofrom_user() regression 2009-02-26 14:02:54 +11:00
crtsavres.S
devres.c
div64.S
dma-noncoherent.c Revert "powerpc: Rework dma-noncoherent to use generic vmalloc layer" 2009-05-27 13:33:14 +10:00
feature-fixups-test.S powerpc: Fixup lwsync at runtime 2008-07-03 16:58:10 +10:00
feature-fixups.c powerpc: Unify opcode definitions and support 2009-02-23 10:48:56 +11:00
locks.c
Makefile powerpc/ppc32: static ftrace fixes for PPC32 2008-11-28 14:08:07 +01:00
mem_64.S
memcpy_64.S powerpc: Fix 64bit memcpy() regression 2009-02-26 14:02:53 +11:00
rheap.c powerpc: Fix corruption error in rh_alloc_fixed() 2008-12-17 10:06:14 -06:00
sstep.c powerpc: Don't emulate mr. instructions 2009-02-10 14:39:07 +11:00
string.S powerpc: Use PPC_LONG and PPC_LONG_ALIGN in lib/string.S 2008-07-22 10:39:35 +10:00
usercopy_64.c