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drm: Fix conflicting macro parameter in drm_mm_for_each_node_in_range() 

start is being used as both a macro parameter and as a member of struct
drm_mm_node (node->start). This causes a conflict as cpp then tries to
replace node->start with the passed in string for "start". Work just
fine so long as you also happened to using local variables called start!

Fixes: 522e85dd86 ("drm: Define drm_mm_for_each_node_in_range()")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Christian König <christian.koenig@amd.com>.
[danvet: Fixup kerneldoc.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161127111623.11124-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2016-11-27 11:16:23 +00:00 committed by Daniel Vetter
parent 218adc17b0
commit 8b2fb7b651
1 changed files with 8 additions and 8 deletions
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16
include/drm/drm_mm.h
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@ -313,10 +313,10 @@ __drm_mm_interval_first(struct drm_mm *mm, u64 start, u64 last);
/**
* drm_mm_for_each_node_in_range - iterator to walk over a range of
* allocated nodes
* @node: drm_mm_node structure to assign to in each iteration step
* @mm: drm_mm allocator to walk
* @start: starting offset, the first node will overlap this
* @end: ending offset, the last node will start before this (but may overlap)
* @node__: drm_mm_node structure to assign to in each iteration step
* @mm__: drm_mm allocator to walk
* @start__: starting offset, the first node will overlap this
* @end__: ending offset, the last node will start before this (but may overlap)
*
* This iterator walks over all nodes in the range allocator that lie
* between @start and @end. It is implemented similarly to list_for_each(),
@ -324,10 +324,10 @@ __drm_mm_interval_first(struct drm_mm *mm, u64 start, u64 last);
* starting node, and so not safe against removal of elements. It assumes
* that @end is within (or is the upper limit of) the drm_mm allocator.
*/
#define drm_mm_for_each_node_in_range(node, mm, start, end) \
for (node = __drm_mm_interval_first((mm), (start), (end)-1); \
node && node->start < (end); \
node = list_next_entry(node, node_list)) \
#define drm_mm_for_each_node_in_range(node__, mm__, start__, end__) \
for (node__ = __drm_mm_interval_first((mm__), (start__), (end__)-1); \
node__ && node__->start < (end__); \
node__ = list_next_entry(node__, node_list))
void drm_mm_init_scan(struct drm_mm *mm,
u64 size,