target/user: Fix cast from pointer to phys_addr_t

The uio_mem structure has a member that is a phys_addr_t, but can
be a number of other types too. The target core driver attempts
to assign a pointer from vmalloc() to it, by casting it to
phys_addr_t, but that causes a warning when phys_addr_t is longer
than a pointer:

drivers/target/target_core_user.c: In function 'tcmu_configure_device':
drivers/target/target_core_user.c:906:22: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast]

This adds another cast to uintptr_t to shut up the warning.
A nicer fix might be to have additional fields in uio_mem
for the different purposes, so we can assign a pointer directly.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Orabug: 25395066
(cherry picked from commit 0633e123465b61a12a262b742bebf2a9945f7964)
Signed-off-by: Kyle Fortin <kyle.fortin@oracle.com>
Reviewed-by: Shan Hai <shan.hai@oracle.com>

diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c
index 08446dc44d9e65575fec9b13780418a6a8d2e9fd..1fda29594114c548112fead45a7b96ebe6faa0ae 100644 (file)
--- a/drivers/target/target_core_user.c
+++ b/drivers/target/target_core_user.c
@@ -901,7 +901,7 @@ static int tcmu_configure_device(struct se_device *dev)
        info->version = __stringify(TCMU_MAILBOX_VERSION);
 
        info->mem[0].name = "tcm-user command & data buffer";
-       info->mem[0].addr = (phys_addr_t) udev->mb_addr;
+       info->mem[0].addr = (phys_addr_t)(uintptr_t)udev->mb_addr;
        info->mem[0].size = TCMU_RING_SIZE;
        info->mem[0].memtype = UIO_MEM_VIRTUAL;