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Subject[PATCH 4.4 102/193] target/user: Fix cast from pointer to phys_addr_t
4.4-stable review patch.  If anyone has any objections, please let me know.


From: Arnd Bergmann <>

commit 0633e123465b61a12a262b742bebf2a9945f7964 upstream.

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 <>
Signed-off-by: Nicholas Bellinger <>
Signed-off-by: Greg Kroah-Hartman <>

drivers/target/target_core_user.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/target/target_core_user.c
+++ b/drivers/target/target_core_user.c
@@ -900,7 +900,7 @@ static int tcmu_configure_device(struct
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;

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