drm: replace drm_[cm]alloc* by kvmalloc alternatives

drm_[cm]alloc* has grown their own kvmalloc with vmalloc fallback
implementations. MM has grown kvmalloc* helpers in the meantime. Let's
use those because it a) reduces the code and b) MM has a better idea
how to implement fallbacks (e.g. do not vmalloc before kmalloc is tried
with __GFP_NORETRY).

drm_calloc_large needs to get __GFP_ZERO explicitly but it is the same
thing as kvmalloc_array in principle.
Signed-off-by: NMichal Hocko <mhocko@suse.com>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170517065509.18659-1-mhocko@kernel.org

include/drm/drm_mem_util.h

-/*
- * Copyright © 2008 Intel Corporation
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
- * IN THE SOFTWARE.
- *
- * Authors:
- *     Jesse Barnes <jbarnes@virtuousgeek.org>
- *
- */
-#ifndef _DRM_MEM_UTIL_H_
-#define _DRM_MEM_UTIL_H_
-
-#include <linux/vmalloc.h>
-
-static __inline__ void *drm_calloc_large(size_t nmemb, size_t size)
-{
-	if (size != 0 && nmemb > SIZE_MAX / size)
-		return NULL;
-
-	if (size * nmemb <= PAGE_SIZE)
-	    return kcalloc(nmemb, size, GFP_KERNEL);
-
-	return vzalloc(size * nmemb);
-}
-
-/* Modeled after cairo's malloc_ab, it's like calloc but without the zeroing. */
-static __inline__ void *drm_malloc_ab(size_t nmemb, size_t size)
-{
-	if (size != 0 && nmemb > SIZE_MAX / size)
-		return NULL;
-
-	if (size * nmemb <= PAGE_SIZE)
-	    return kmalloc(nmemb * size, GFP_KERNEL);
-
-	return vmalloc(size * nmemb);
-}
-
-static __inline__ void *drm_malloc_gfp(size_t nmemb, size_t size, gfp_t gfp)
-{
-	if (size != 0 && nmemb > SIZE_MAX / size)
-		return NULL;
-
-	if (size * nmemb <= PAGE_SIZE)
-		return kmalloc(nmemb * size, gfp);
-
-	if (gfp & __GFP_RECLAIMABLE) {
-		void *ptr = kmalloc(nmemb * size,
-				    gfp | __GFP_NOWARN | __GFP_NORETRY);
-		if (ptr)
-			return ptr;
-	}
-
-	return __vmalloc(size * nmemb, gfp, PAGE_KERNEL);
-}
-
-static __inline void drm_free_large(void *ptr)
-{
-	kvfree(ptr);
-}
-
-#endif