From: Arnd Bergmann arnd@arndb.de
commit 42641042c10c757fe10cc09088cf3f436cec5007 upstream.
clang-14 complains about an unusual way of converting a pointer to an integer:
drivers/misc/cb710/sgbuf2.c:50:15: error: performing pointer subtraction with a null pointer has undefined behavior [-Werror,-Wnull-pointer-subtraction] return ((ptr - NULL) & 3) != 0;
Replace this with a normal cast to uintptr_t.
Fixes: 5f5bac8272be ("mmc: Driver for CB710/720 memory card reader (MMC part)") Cc: stable stable@vger.kernel.org Signed-off-by: Arnd Bergmann arnd@arndb.de Link: https://lore.kernel.org/r/20210927121408.939246-1-arnd@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/misc/cb710/sgbuf2.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/misc/cb710/sgbuf2.c +++ b/drivers/misc/cb710/sgbuf2.c @@ -47,7 +47,7 @@ static inline bool needs_unaligned_copy( #ifdef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS return false; #else - return ((ptr - NULL) & 3) != 0; + return ((uintptr_t)ptr & 3) != 0; #endif }