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| author | Maíra Canal <maira.canal@usp.br> | 2022-01-31 21:22:42 +0300 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2022-02-01 19:31:55 +0300 |
| commit | 90b2433edb6d995bd23d6adde753095b4ab26104 (patch) | |
| tree | 808609b1f7efc50d00639b0b0754008f821c1274 /fs/kernfs | |
| parent | 6692531df62d812de5d22c8bca0d90edc163aa84 (diff) | |
| download | linux-90b2433edb6d995bd23d6adde753095b4ab26104.tar.xz | |
seq_file: fix NULL pointer arithmetic warning
Implement conditional logic in order to replace NULL pointer arithmetic.
The use of NULL pointer arithmetic was pointed out by clang with the
following warning:
fs/kernfs/file.c:128:15: warning: performing pointer arithmetic on a
null pointer has undefined behavior [-Wnull-pointer-arithmetic]
return NULL + !*ppos;
~~~~ ^
fs/seq_file.c:559:14: warning: performing pointer arithmetic on a
null pointer has undefined behavior [-Wnull-pointer-arithmetic]
return NULL + (*pos == 0);
Signed-off-by: Maíra Canal <maira.canal@usp.br>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/kernfs')
| -rw-r--r-- | fs/kernfs/file.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/fs/kernfs/file.c b/fs/kernfs/file.c index 9414a7a60a9f..7aefaca876a0 100644 --- a/fs/kernfs/file.c +++ b/fs/kernfs/file.c @@ -120,13 +120,8 @@ static void *kernfs_seq_start(struct seq_file *sf, loff_t *ppos) if (next == ERR_PTR(-ENODEV)) kernfs_seq_stop_active(sf, next); return next; - } else { - /* - * The same behavior and code as single_open(). Returns - * !NULL if pos is at the beginning; otherwise, NULL. - */ - return NULL + !*ppos; } + return single_start(sf, ppos); } static void *kernfs_seq_next(struct seq_file *sf, void *v, loff_t *ppos) |