19809c2da2
__vmalloc* allows users to provide gfp flags for the underlying allocation. This API is quite popular $ git grep "=[[:space:]]__vmalloc\|return[[:space:]]*__vmalloc" | wc -l 77 The only problem is that many people are not aware that they really want to give __GFP_HIGHMEM along with other flags because there is really no reason to consume precious lowmemory on CONFIG_HIGHMEM systems for pages which are mapped to the kernel vmalloc space. About half of users don't use this flag, though. This signals that we make the API unnecessarily too complex. This patch simply uses __GFP_HIGHMEM implicitly when allocating pages to be mapped to the vmalloc space. Current users which add __GFP_HIGHMEM are simplified and drop the flag. Link: http://lkml.kernel.org/r/20170307141020.29107-1-mhocko@kernel.org Signed-off-by: Michal Hocko <mhocko@suse.com> Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: David Rientjes <rientjes@google.com> Cc: Cristopher Lameter <cl@linux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
79 lines
2.3 KiB
C
79 lines
2.3 KiB
C
/*
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* Copyright © 2008 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors:
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* Jesse Barnes <jbarnes@virtuousgeek.org>
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*
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*/
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#ifndef _DRM_MEM_UTIL_H_
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#define _DRM_MEM_UTIL_H_
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#include <linux/vmalloc.h>
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static __inline__ void *drm_calloc_large(size_t nmemb, size_t size)
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{
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if (size != 0 && nmemb > SIZE_MAX / size)
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return NULL;
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if (size * nmemb <= PAGE_SIZE)
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return kcalloc(nmemb, size, GFP_KERNEL);
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return vzalloc(size * nmemb);
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}
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/* Modeled after cairo's malloc_ab, it's like calloc but without the zeroing. */
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static __inline__ void *drm_malloc_ab(size_t nmemb, size_t size)
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{
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if (size != 0 && nmemb > SIZE_MAX / size)
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return NULL;
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if (size * nmemb <= PAGE_SIZE)
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return kmalloc(nmemb * size, GFP_KERNEL);
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return vmalloc(size * nmemb);
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}
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static __inline__ void *drm_malloc_gfp(size_t nmemb, size_t size, gfp_t gfp)
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{
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if (size != 0 && nmemb > SIZE_MAX / size)
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return NULL;
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if (size * nmemb <= PAGE_SIZE)
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return kmalloc(nmemb * size, gfp);
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if (gfp & __GFP_RECLAIMABLE) {
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void *ptr = kmalloc(nmemb * size,
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gfp | __GFP_NOWARN | __GFP_NORETRY);
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if (ptr)
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return ptr;
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}
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return __vmalloc(size * nmemb, gfp, PAGE_KERNEL);
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}
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static __inline void drm_free_large(void *ptr)
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{
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kvfree(ptr);
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}
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#endif
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