• Michael Ellerman's avatar
    powerpc: Remove more traces of bootmem · e39f223f
    Michael Ellerman authored
    Although we are now selecting NO_BOOTMEM, we still have some traces of
    bootmem lying around. That is because even with NO_BOOTMEM there is
    still a shim that converts bootmem calls into memblock calls, but
    ultimately we want to remove all traces of bootmem.
    
    Most of the patch is conversions from alloc_bootmem() to
    memblock_virt_alloc(). In general a call such as:
    
      p = (struct foo *)alloc_bootmem(x);
    
    Becomes:
    
      p = memblock_virt_alloc(x, 0);
    
    We don't need the cast because memblock_virt_alloc() returns a void *.
    The alignment value of zero tells memblock to use the default alignment,
    which is SMP_CACHE_BYTES, the same value alloc_bootmem() uses.
    
    We remove a number of NULL checks on the result of
    memblock_virt_alloc(). That is because memblock_virt_alloc() will panic
    if it can't allocate, in exactly the same way as alloc_bootmem(), so the
    NULL checks are and always have been redundant.
    
    The memory returned by memblock_virt_alloc() is already zeroed, so we
    remove several memsets of the result of memblock_virt_alloc().
    
    Finally we convert a few uses of __alloc_bootmem(x, y, MAX_DMA_ADDRESS)
    to just plain memblock_virt_alloc(). We don't use memblock_alloc_base()
    because MAX_DMA_ADDRESS is ~0ul on powerpc, so limiting the allocation
    to that is pointless, 16XB ought to be enough for anyone.
    Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
    e39f223f
mmu_context_nohash.c 12.3 KB