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| author | Arnd Bergmann <arnd@arndb.de> | 2021-09-27 15:13:57 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-10-20 12:45:00 +0300 |
| commit | 2c5dd2a8af7704776376c8885d3b78d2442c32ed (patch) | |
| tree | b8808e75f309923bb6dba071521b986ad2150945 /drivers/misc | |
| parent | d40e193abd073d8bf39ae9979633761f032c0a75 (diff) | |
| download | linux-2c5dd2a8af7704776376c8885d3b78d2442c32ed.tar.xz | |
cb710: avoid NULL pointer subtraction
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>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/cb710/sgbuf2.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/misc/cb710/sgbuf2.c b/drivers/misc/cb710/sgbuf2.c index e5a4ed3701eb..a798fad5f03c 100644 --- a/drivers/misc/cb710/sgbuf2.c +++ b/drivers/misc/cb710/sgbuf2.c @@ -47,7 +47,7 @@ static inline bool needs_unaligned_copy(const void *ptr) #ifdef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS return false; #else - return ((ptr - NULL) & 3) != 0; + return ((uintptr_t)ptr & 3) != 0; #endif } |