Scroll to navigation

DRM_MM_FOR_EACH_HOLE(9) DRM Core DRM_MM_FOR_EACH_HOLE(9)

NAME

drm_mm_for_each_hole - iterator to walk over all holes

SYNOPSIS

drm_mm_for_each_hole(entry, mm, hole_start, hole_end);

ARGUMENTS

entry
drm_mm_node used internally to track progress
mm
drm_mm allocator to walk
hole_start
ulong variable to assign the hole start to on each iteration
hole_end
ulong variable to assign the hole end to on each iteration

DESCRIPTION

This iterator walks over all holes in the range allocator. It is implemented with list_for_each, so not save against removal of elements. entry is used internally and will not reflect a real drm_mm_node for the very first hole. Hence users of this iterator may not access it.

IMPLEMENTATION NOTE

We need to inline list_for_each_entry in order to be able to set hole_start and hole_end on each iteration while keeping the macro sane.
The __drm_mm_for_each_hole version is similar, but with added support for going backwards.

AUTHORS

Jesse Barnes <jesse.barnes@intel.com>
 
Intel Corporation,
Initial version
Laurent Pinchart <laurent.pinchart@ideasonboard.com>
 
Ideas on board SPRL,
Driver internals
Daniel Vetter <daniel.vetter@ffwll.ch>
 
Intel Corporation,
Contributions all over the place

COPYRIGHT

February 2017 Kernel Hackers Manual 3.16