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| author | Arnd Bergmann <arnd@arndb.de> | 2021-09-27 14:13:57 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-10-20 10:42:03 +0200 |
| commit | cf79c98d528ee1b7c3b4e915fff434f6192664e0 (patch) | |
| tree | 2ca6cc6af26200885a6b658b41b44a7dc853a2c9 /drivers/misc | |
| parent | bf979fa5d0eb8345a48f577a53abc74374fa213f (diff) | |
| download | linux-stable-cf79c98d528ee1b7c3b4e915fff434f6192664e0.tar.gz linux-stable-cf79c98d528ee1b7c3b4e915fff434f6192664e0.tar.bz2 linux-stable-cf79c98d528ee1b7c3b4e915fff434f6192664e0.zip | |
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 2a40d0efdff5..4d2a72a537d4 100644 --- a/drivers/misc/cb710/sgbuf2.c +++ b/drivers/misc/cb710/sgbuf2.c @@ -50,7 +50,7 @@ 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 } |