On 3/20/26 23:39, Lorenzo Stoakes (Oracle) wrote: > A user can invoke mmap_action_map_kernel_pages() to specify that the > mapping should map kernel pages starting from desc->start of a specified > number of pages specified in an array. > > In order to implement this, adjust mmap_action_prepare() to be able to > return an error code, as it makes sense to assert that the specified > parameters are valid as quickly as possible as well as updating the VMA > flags to include VMA_MIXEDMAP_BIT as necessary. > > This provides an mmap_prepare equivalent of vm_insert_pages(). We > additionally update the existing vm_insert_pages() code to use > range_in_vma() and add a new range_in_vma_desc() helper function for the > mmap_prepare case, sharing the code between the two in range_is_subset(). > > We add both mmap_action_map_kernel_pages() and > mmap_action_map_kernel_pages_full() to allow for both partial and full VMA > mappings. > > We update the documentation to reflect the new features. > > Finally, we update the VMA tests accordingly to reflect the changes. > > Reviewed-by: Suren Baghdasaryan <[email protected]> > Signed-off-by: Lorenzo Stoakes (Oracle) <[email protected]>
Acked-by: Vlastimil Babka (SUSE) <[email protected]>
