diff options
author | Tim Gardner <tim.gardner@canonical.com> | 2014-08-28 11:26:03 -0600 |
---|---|---|
committer | Al Viro <viro@zeniv.linux.org.uk> | 2014-10-09 02:39:10 -0400 |
commit | b8850d1fa8e2f6653e57daf6d08e58c5f5eb2c85 (patch) | |
tree | 5648df7e01da32afbbf962a8c73b54111fd50f5f /fs/namespace.c | |
parent | 8ba7f6c2faada3ad553518b9febbdce7a988359b (diff) | |
download | op-kernel-dev-b8850d1fa8e2f6653e57daf6d08e58c5f5eb2c85.zip op-kernel-dev-b8850d1fa8e2f6653e57daf6d08e58c5f5eb2c85.tar.gz |
fs: namespace: suppress 'may be used uninitialized' warnings
The gcc version 4.9.1 compiler complains Even though it isn't possible for
these variables to not get initialized before they are used.
fs/namespace.c: In function ‘SyS_mount’:
fs/namespace.c:2720:8: warning: ‘kernel_dev’ may be used uninitialized in this function [-Wmaybe-uninitialized]
ret = do_mount(kernel_dev, kernel_dir->name, kernel_type, flags,
^
fs/namespace.c:2699:8: note: ‘kernel_dev’ was declared here
char *kernel_dev;
^
fs/namespace.c:2720:8: warning: ‘kernel_type’ may be used uninitialized in this function [-Wmaybe-uninitialized]
ret = do_mount(kernel_dev, kernel_dir->name, kernel_type, flags,
^
fs/namespace.c:2697:8: note: ‘kernel_type’ was declared here
char *kernel_type;
^
Fix the warnings by simplifying copy_mount_string() as suggested by Al Viro.
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/namespace.c')
-rw-r--r-- | fs/namespace.c | 26 |
1 files changed, 8 insertions, 18 deletions
diff --git a/fs/namespace.c b/fs/namespace.c index 00e5b1e..abd3abb 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -2514,21 +2514,9 @@ int copy_mount_options(const void __user * data, unsigned long *where) return 0; } -int copy_mount_string(const void __user *data, char **where) +char *copy_mount_string(const void __user *data) { - char *tmp; - - if (!data) { - *where = NULL; - return 0; - } - - tmp = strndup_user(data, PAGE_SIZE); - if (IS_ERR(tmp)) - return PTR_ERR(tmp); - - *where = tmp; - return 0; + return data ? strndup_user(data, PAGE_SIZE) : NULL; } /* @@ -2794,8 +2782,9 @@ SYSCALL_DEFINE5(mount, char __user *, dev_name, char __user *, dir_name, char *kernel_dev; unsigned long data_page; - ret = copy_mount_string(type, &kernel_type); - if (ret < 0) + kernel_type = copy_mount_string(type); + ret = PTR_ERR(kernel_type); + if (IS_ERR(kernel_type)) goto out_type; kernel_dir = getname(dir_name); @@ -2804,8 +2793,9 @@ SYSCALL_DEFINE5(mount, char __user *, dev_name, char __user *, dir_name, goto out_dir; } - ret = copy_mount_string(dev_name, &kernel_dev); - if (ret < 0) + kernel_dev = copy_mount_string(dev_name); + ret = PTR_ERR(kernel_dev); + if (IS_ERR(kernel_dev)) goto out_dev; ret = copy_mount_options(data, &data_page); |