From: Arnd Bergmann <arnd@xxxxxxxx>
[ Upstream commit d9594e0409651a237903a13c9718df889f43d43b ]
clang warns about additions on NULL pointers being undefined in C:
security/tomoyo/securityfs_if.c:226:59: warning: arithmetic on a null pointer treated as a cast from integer to pointer is a GNU extension [-Wnull-pointer-arithmetic]
securityfs_create_file(name, mode, parent, ((u8 *) NULL) + key,
Change the code to instead use a cast through uintptr_t to avoid
the warning.
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
security/tomoyo/securityfs_if.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/security/tomoyo/securityfs_if.c b/security/tomoyo/securityfs_if.c
index 179a955b319df..1e6a4ed5ae54d 100644
--- a/security/tomoyo/securityfs_if.c
+++ b/security/tomoyo/securityfs_if.c
@@ -135,8 +135,8 @@ static const struct file_operations tomoyo_self_operations = {
*/
static int tomoyo_open(struct inode *inode, struct file *file)
{
- const int key = ((u8 *) file_inode(file)->i_private)
- - ((u8 *) NULL);
+ const u8 key = (uintptr_t) file_inode(file)->i_private;
+
return tomoyo_open_control(key, file);
}
@@ -227,7 +227,7 @@ static const struct file_operations tomoyo_operations = {
static void __init tomoyo_create_entry(const char *name, const umode_t mode,
struct dentry *parent, const u8 key)
{
- securityfs_create_file(name, mode, parent, ((u8 *) NULL) + key,
+ securityfs_create_file(name, mode, parent, (void *) (uintptr_t) key,
&tomoyo_operations);
}
--
2.27.0
