On Mon, 2010-11-29 at 15:26 +1100, Michael Ellerman wrote:
> The vmalloc code can track the physical address of a vma, when the
> vma is used for ioremap, if set it is displayed in /proc/vmallocinfo.
>
> Because get_vm_area_caller() doesn't know it's being called for
> ioremap() it's up to the arch code to set the phys_addr. A bunch
> of other arch's do this, I'm not sure why powerpc doesn't?
Because I never noticed ? :-)
Cheers,
Ben.
> Signed-off-by: Michael Ellerman <mich...@ellerman.id.au>
> ---
> arch/powerpc/mm/pgtable_32.c | 1 +
> arch/powerpc/mm/pgtable_64.c | 2 ++
> 2 files changed, 3 insertions(+), 0 deletions(-)
>
> diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
> index a87ead0..71932d0 100644
> --- a/arch/powerpc/mm/pgtable_32.c
> +++ b/arch/powerpc/mm/pgtable_32.c
> @@ -230,6 +230,7 @@ __ioremap_caller(phys_addr_t addr, unsigned long size,
> unsigned long flags,
> area = get_vm_area_caller(size, VM_IOREMAP, caller);
> if (area == 0)
> return NULL;
> + area->phys_addr = p;
> v = (unsigned long) area->addr;
> } else {
> v = (ioremap_bot -= size);
> diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c
> index 21d6dfa..88927a0 100644
> --- a/arch/powerpc/mm/pgtable_64.c
> +++ b/arch/powerpc/mm/pgtable_64.c
> @@ -223,6 +223,8 @@ void __iomem * __ioremap_caller(phys_addr_t addr,
> unsigned long size,
> caller);
> if (area == NULL)
> return NULL;
> +
> + area->phys_addr = paligned;
> ret = __ioremap_at(paligned, area->addr, size, flags);
> if (!ret)
> vunmap(area->addr);
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