Am 08.02.2018 um 10:09 schrieb Michel Dänzer: > On 2018-02-08 09:32 AM, Chunming Zhou wrote: >> it will be used to check if the driver needs swiotlb >> >> Change-Id: Idbe47af8f12032d4803bb3d47273e807f19169c3 >> Signed-off-by: Chunming Zhou <david1.zhou at amd.com> >> Reviewed-by: Monk Liu <monk.liu at amd.com> >> --- >> include/drm/drm_cache.h | 13 +++++++++++++ >> 1 file changed, 13 insertions(+) >> >> diff --git a/include/drm/drm_cache.h b/include/drm/drm_cache.h >> index beab0f0d0cfb..442c9ba63d03 100644 >> --- a/include/drm/drm_cache.h >> +++ b/include/drm/drm_cache.h >> @@ -39,6 +39,19 @@ void drm_clflush_pages(struct page *pages[], unsigned long num_pages); >> void drm_clflush_sg(struct sg_table *st); >> void drm_clflush_virt_range(void *addr, unsigned long length); >> >> +static inline u64 drm_get_max_iomem(void) >> +{ >> + struct resource *tmp; >> + u64 max_iomem = 0; >> + >> + for (tmp = iomem_resource.child; tmp; tmp = tmp->sibling) { >> + max_iomem = max(max_iomem, tmp->end); >> + } >> + >> + return max_iomem; >> +} > I don't think this needs to be an inline function, does it? Well it is defined in a header, so it must be inline because of this. But if you know a good place, we could also move it into some C file. Christian.