Author: Julia Lawall <Julia.Lawall@lip6.fr> Remove unneeded NULL test. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // @@ expression x; @@ -if (x != NULL) \(kmem_cache_destroy\|mempool_destroy\|dma_pool_destroy\)(x); // Signed-off-by: Julia Lawall Signed-off-by: Daniel Vetter — drivers/gpu/drm/i915/i915_dma.c | 19 ++++++————- 1 file changed, 6 insertions(+), 13 deletions(-) diff –git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index 817b05c..ae1ba47 …