Commit 728e5ae0 authored by Baoquan He's avatar Baoquan He Committed by Andrew Morton
Browse files

powerpc: mm: add VM_IOREMAP flag to the vmalloc area 

Currently, for vmalloc areas with flag VM_IOREMAP set, except of the
specific alignment clamping in __get_vm_area_node(), they will be

 1) Shown as ioremap in /proc/vmallocinfo;

 2) Ignored by /proc/kcore reading via vread()

So for the io mapping in ioremap_phb() of ppc, we should set VM_IOREMAP in
flag to make it handled correctly as above.

Link: https://lkml.kernel.org/r/20230206084020.174506-7-bhe@redhat.com


Signed-off-by: default avatarBaoquan He <bhe@redhat.com>
Reviewed-by: default avatarLorenzo Stoakes <lstoakes@gmail.com>
Reviewed-by: default avatarUladzislau Rezki (Sony) <urezki@gmail.com>
Cc: Dan Carpenter <error27@gmail.com>
Cc: Stephen Brennan <stephen.s.brennan@oracle.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 30a7a9b1

arch/powerpc/kernel/pci_64.c

+1 −1
Original line number Diff line number Diff line
@@ -132,7 +132,7 @@ void __iomem *ioremap_phb(phys_addr_t paddr, unsigned long size) 
	 * address decoding but I'd rather not deal with those outside of the

	 * reserved 64K legacy region.

	 */

	area = __get_vm_area_caller(size, 0, PHB_IO_BASE, PHB_IO_END,

	area = __get_vm_area_caller(size, VM_IOREMAP, PHB_IO_BASE, PHB_IO_END,

				    __builtin_return_address(0));

	if (!area)

		return NULL;