On Thu, Dec 05, 2024 at 03:21:10PM +0200, Leon Romanovsky wrote: > From: Leon Romanovsky <leonro@xxxxxxxxxx> > > Introduce new sticky flag (HMM_PFN_DMA_MAPPED), which isn't overwritten > by HMM range fault. Such flag allows users to tag specific PFNs with information > if this specific PFN was already DMA mapped. Missing line wrap at 73 characters here. > > @@ -253,14 +262,14 @@ static int hmm_vma_handle_pte(struct mm_walk *walk, unsigned long addr, > cpu_flags = HMM_PFN_VALID; > if (is_writable_device_private_entry(entry)) > cpu_flags |= HMM_PFN_WRITE; > - *hmm_pfn = swp_offset_pfn(entry) | cpu_flags; > + *hmm_pfn = (*hmm_pfn & HMM_PFN_INOUT_FLAGS) | swp_offset_pfn(entry) | cpu_flags; Please avoid the overly long line here. That being said I hate the structure here. Can't we just have a local variable for the actual new pfn value, and then a single goto label at the end that takes the keeper flags from the argument and assigning the new out value to *hmm_pfn instead of duplicating this in half a dozen places?
