powerpc: Record vma->phys_addr in ioremap()

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?

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

2 files changed, 3 insertions, 0 deletions

diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
index a87ead0138b..71932d000a7 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 21d6dfab794..88927a05cdc 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);