#ifndef __BACKPORT_MM_H #define __BACKPORT_MM_H #include_next #include #include #include #include #include #if LINUX_VERSION_IS_LESS(4,12,0) #define kvmalloc LINUX_BACKPORT(kvmalloc) static inline void *kvmalloc(size_t size, gfp_t flags) { gfp_t kmalloc_flags = flags; void *ret; if ((flags & GFP_KERNEL) != GFP_KERNEL) return kmalloc(size, flags); if (size > PAGE_SIZE) kmalloc_flags |= __GFP_NOWARN | __GFP_NORETRY; ret = kmalloc(size, flags); if (ret || size < PAGE_SIZE) return ret; return vmalloc(size); } #define kvmalloc_array LINUX_BACKPORT(kvmalloc_array) static inline void *kvmalloc_array(size_t n, size_t size, gfp_t flags) { size_t bytes; if (unlikely(check_mul_overflow(n, size, &bytes))) return NULL; return kvmalloc(bytes, flags); } #define kvzalloc LINUX_BACKPORT(kvzalloc) static inline void *kvzalloc(size_t size, gfp_t flags) { return kvmalloc(size, flags | __GFP_ZERO); } #endif #if LINUX_VERSION_IS_LESS(4,18,0) #define kvcalloc LINUX_BACKPORT(kvcalloc) static inline void *kvcalloc(size_t n, size_t size, gfp_t flags) { return kvmalloc_array(n, size, flags | __GFP_ZERO); } #endif /* < 4.18 */ #endif /* __BACKPORT_MM_H */