On 05/17/2012 07:54 PM, Marek Szyprowski wrote: > Add new type of vm_area intented to be used for consisten mappings > created by dma-mapping framework. > > Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> > Reviewed-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx> > --- > include/linux/vmalloc.h | 1 + > mm/vmalloc.c | 3 +++ > 2 files changed, 4 insertions(+) > > diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h > index 6071e91..8a9555a 100644 > --- a/include/linux/vmalloc.h > +++ b/include/linux/vmalloc.h > @@ -14,6 +14,7 @@ struct vm_area_struct; /* vma defining user mapping in mm_types.h */ > #define VM_USERMAP 0x00000008 /* suitable for remap_vmalloc_range */ > #define VM_VPAGES 0x00000010 /* buffer for pages was vmalloc'ed */ > #define VM_UNLIST 0x00000020 /* vm_struct is not listed in vmlist */ > +#define VM_DMA 0x00000040 /* used by dma-mapping framework */ > /* bits [20..32] reserved for arch specific ioremap internals */ > > /* > diff --git a/mm/vmalloc.c b/mm/vmalloc.c > index 8cb7f22..9c13bab 100644 > --- a/mm/vmalloc.c > +++ b/mm/vmalloc.c > @@ -2582,6 +2582,9 @@ static int s_show(struct seq_file *m, void *p) > if (v->flags & VM_IOREMAP) > seq_printf(m, " ioremap"); > > + if (v->flags & VM_DMA) > + seq_printf(m, " dma"); > + Hmm, VM_DMA would become generic flag? AFAIU, maybe VM_DMA would be used only on ARM arch. Of course, it isn't performance sensitive part but there in no reason to check it, either in other architecture except ARM. I suggest following as #ifdef CONFIG_ARM #define VM_DMA 0x00000040 #else #define VM_DMA 0x0 #end Maybe it could remove check code at compile time. > if (v->flags & VM_ALLOC) > seq_printf(m, " vmalloc"); > -- Kind regards, Minchan Kim -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>