Re: [PATCH] drm/ttm: use swap macro in ttm_bo_handle_move_mem
From: Christian KÃnig
Date: Fri Jul 13 2018 - 02:41:56 EST
Am 13.07.2018 um 04:37 schrieb Sinclair Yeh:
On Mon, Jul 09, 2018 at 10:24:47AM -0500, Gustavo A. R. Silva wrote:
Make use of the swap macro and remove unnecessary variable *tmp_mem*.
This makes the code easier to read and maintain. Also, reduces the
stack usage.
This code was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>
---
drivers/gpu/drm/ttm/ttm_bo.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 5d8688e52..5142dcb 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -287,12 +287,9 @@ static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
if (ret) {
if (bdev->driver->move_notify) {
- struct ttm_mem_reg tmp_mem = *mem;
- *mem = bo->mem;
- bo->mem = tmp_mem;
+ swap(*mem, bo->mem);
bdev->driver->move_notify(bo, false, mem);
- bo->mem = *mem;
- *mem = tmp_mem;
+ swap(*mem, bo->mem);
This code assumes bo->mem is the same as tmp_mem after the call to
move_notify. Is this always true?
Actually the old code assumed that. Using the swap macro now fixed that
little unclean implementation.
Christian.
}
goto out_err;
--
2.7.4
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