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memory.h
/** @file @brief Linux kernel memory management interface wrapper @details Copyright (c) 2017-2018 Acronis International GmbH @author Mikhail Krivtsov (mikhail.krivtsov@acronis.com) @since $Id: $ */ #pragma once #include <linux/mm.h> // is_vmalloc_addr() #include <linux/slab.h> // kmalloc(), kzalloc(), kfree() #include <linux/vmalloc.h> // vmalloc(), vfree() #define mem_alloc_with_alloc_flags(size, nowait) kmalloc(size, (nowait) ? (GFP_ATOMIC) : (GFP_KERNEL)) #define mem_alloc0_with_alloc_flags(size, nowait) kzalloc(size, (nowait) ? (GFP_ATOMIC) : (GFP_KERNEL)) #define mem_alloc(size) mem_alloc_with_alloc_flags(size, false) #define mem_alloc0(size) mem_alloc0_with_alloc_flags(size, false) #define mem_alloc_nowait(size) mem_alloc_with_alloc_flags(size, true) #define mem_alloc0_nowait(size) mem_alloc0_with_alloc_flags(size, true) #define mem_free(p) kfree(p) static inline void *kvmalloc_compat(size_t size, gfp_t flags) { void *ret; ret = kmalloc(size, flags | __GFP_NOWARN); if (ret) { return ret; } return vmalloc(size); } static inline void kvfree_compat(void *addr) { if (is_vmalloc_addr(addr)) vfree(addr); else kfree(addr); } #define large_mem_alloc(size) kvmalloc_compat(size, GFP_KERNEL) #define large_mem_free(p) kvfree_compat(p) #define vmem_alloc(size) vmalloc(size) #define vmem_free(p) vfree(p)
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