env: spdk_vtophys buffer argument is now const

Indicate that this parameter is not modified.

Signed-off-by: Ben Walker <benjamin.walker@intel.com>
Change-Id: I1e68f6c5ed4cbfaed0495e969ee1a50c31e9ccac
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/4583
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Mellanox Build Bot
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>

include/spdk/env.h

@@ -640,7 +640,7 @@ bool spdk_iommu_is_enabled(void);
  * \return the physical address of this buffer on success, or SPDK_VTOPHYS_ERROR
  * on failure.
  */
-uint64_t spdk_vtophys(void *buf, uint64_t *size);
+uint64_t spdk_vtophys(const void *buf, uint64_t *size);
 
 struct spdk_pci_addr {
 	uint32_t			domain;

lib/env_dpdk/memory.c

@@ -1421,7 +1421,7 @@ vtophys_init(void)
 }
 
 uint64_t
-spdk_vtophys(void *buf, uint64_t *size)
+spdk_vtophys(const void *buf, uint64_t *size)
 {
 	uint64_t vaddr, paddr_2mb;
 

test/common/lib/test_env.c

@@ -276,7 +276,7 @@ spdk_dma_free(void *buf)
 #ifndef UNIT_TEST_NO_VTOPHYS
 DEFINE_RETURN_MOCK(spdk_vtophys, uint64_t);
 uint64_t
-spdk_vtophys(void *buf, uint64_t *size)
+spdk_vtophys(const void *buf, uint64_t *size)
 {
 	HANDLE_RETURN_MOCK(spdk_vtophys);
 

test/unit/lib/bdev/compress.c/compress_ut.c

@@ -303,7 +303,7 @@ int g_small_size_counter = 0;
 int g_small_size_modify = 0;
 uint64_t g_small_size = 0;
 uint64_t
-spdk_vtophys(void *buf, uint64_t *size)
+spdk_vtophys(const void *buf, uint64_t *size)
 {
 	g_small_size_counter++;
 	if (g_small_size_counter == g_small_size_modify) {

test/unit/lib/nvme/nvme_pcie.c/nvme_pcie_ut.c

@@ -130,7 +130,7 @@ static uint64_t g_vtophys_size = 0;
 
 DEFINE_RETURN_MOCK(spdk_vtophys, uint64_t);
 uint64_t
-spdk_vtophys(void *buf, uint64_t *size)
+spdk_vtophys(const void *buf, uint64_t *size)
 {
 	if (size) {
 		*size = g_vtophys_size;