[PATCH 1/2] mtd: st_spi_fsm: correct type issues
Lee Jones
lee.jones at linaro.org
Wed Apr 16 03:46:11 PDT 2014
> Compile-testing for a 64-bit arch uncovers several bad casts:
>
> In file included from include/linux/linkage.h:4:0,
> from include/linux/kernel.h:6,
> from drivers/mtd/devices/st_spi_fsm.c:15:
> drivers/mtd/devices/st_spi_fsm.c: In function ‘stfsm_read_fifo’:
> drivers/mtd/devices/st_spi_fsm.c:758:11: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
> BUG_ON((((uint32_t)buf) & 0x3) || (size & 0x3));
> ...
>
> Use uintptr_t instead of uint32_t, since it's guaranteed to be
> pointer-sized.
>
> We also see this warning, if size_t is not 32 bits wide:
>
> In file included from drivers/mtd/devices/st_spi_fsm.c:15:0:
> drivers/mtd/devices/st_spi_fsm.c: In function ‘stfsm_mtd_write’:
> include/linux/kernel.h:712:17: warning: comparison of distinct pointer types lacks a cast [enabled by default]
> (void) (&_min1 == &_min2); \
> ^
> drivers/mtd/devices/st_spi_fsm.c:1704:11: note: in expansion of macro ‘min’
> bytes = min(FLASH_PAGESIZE - page_offs, len);
> ^
>
> Just use min_t() to force the type conversion, since we don't really
> want to upgrade 'page_offs' and 'bytes' to size_t; they only should be
> handling <= 256 byte offsets.
>
> Signed-off-by: Brian Norris <computersforpeace at gmail.com>
> Cc: Lee Jones <lee.jones at linaro.org>
> ---
> drivers/mtd/devices/st_spi_fsm.c | 12 ++++++------
> 1 file changed, 6 insertions(+), 6 deletions(-)
Thanks for fixing Brian. Fixes look good.
Acked-by: Lee Jones <lee.jones at linaro.org>
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
More information about the linux-mtd
mailing list