Memory Allocation and Deallocation Functions
The memory allocation and deallocation functions are:
- kmem_alloc()
Allocate kernel memory
- kmem_free()
Free kernel memory
- kmem_zalloc()
Allocate zero-filled kernel memory
The following functions allocate and free memory intended to be used for DMA. See
Direct Memory Access (DMA) Functions.
- ddi_dma_mem_alloc()
Allocate memory for DMA transfer
- ddi_dma_mem_free()
Free previously allocated DMA memory
The following functions allocate and free memory intended to be exported to user
space. See User Space Access Functions.
- ddi_umem_alloc()
Allocate page-aligned kernel memory
- ddi_umem_free()
Free page-aligned kernel memory
Table B-2 Deprecated Memory Allocation and Deallocation Functions
Deprecated Function |
Replacement |
|---|
ddi_iopb_alloc() |
ddi_dma_mem_alloc() |
ddi_iopb_free() |
ddi_dma_mem_free() |
ddi_mem_alloc() |
ddi_dma_mem_alloc() |
ddi_mem_free() |
ddi_dma_mem_free() |
