diff options
Diffstat (limited to 'kernel/cgroup.c')
| -rw-r--r-- | kernel/cgroup.c | 39 |
1 files changed, 18 insertions, 21 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 657f8f8d93a5..13932abde159 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -355,6 +355,17 @@ static struct css_set *find_existing_css_set( return NULL; } +static void free_cg_links(struct list_head *tmp) +{ + struct cg_cgroup_link *link; + struct cg_cgroup_link *saved_link; + + list_for_each_entry_safe(link, saved_link, tmp, cgrp_link_list) { + list_del(&link->cgrp_link_list); + kfree(link); + } +} + /* * allocate_cg_links() allocates "count" cg_cgroup_link structures * and chains them on tmp through their cgrp_link_list fields. Returns 0 on @@ -363,17 +374,12 @@ static struct css_set *find_existing_css_set( static int allocate_cg_links(int count, struct list_head *tmp) { struct cg_cgroup_link *link; - struct cg_cgroup_link *saved_link; int i; INIT_LIST_HEAD(tmp); for (i = 0; i < count; i++) { link = kmalloc(sizeof(*link), GFP_KERNEL); if (!link) { - list_for_each_entry_safe(link, saved_link, tmp, - cgrp_link_list) { - list_del(&link->cgrp_link_list); - kfree(link); - } + free_cg_links(tmp); return -ENOMEM; } list_add(&link->cgrp_link_list, tmp); @@ -381,17 +387,6 @@ static int allocate_cg_links(int count, struct list_head *tmp) return 0; } -static void free_cg_links(struct list_head *tmp) -{ - struct cg_cgroup_link *link; - struct cg_cgroup_link *saved_link; - - list_for_each_entry_safe(link, saved_link, tmp, cgrp_link_list) { - list_del(&link->cgrp_link_list); - kfree(link); - } -} - /* * find_css_set() takes an existing cgroup group and a * cgroup object, and returns a css_set object that's @@ -956,7 +951,6 @@ static int cgroup_get_sb(struct file_system_type *fs_type, struct super_block *sb; struct cgroupfs_root *root; struct list_head tmp_cg_links; - INIT_LIST_HEAD(&tmp_cg_links); /* First find the desired set of subsystems */ ret = parse_cgroupfs_options(data, &opts); @@ -1424,14 +1418,17 @@ static ssize_t cgroup_write_string(struct cgroup *cgrp, struct cftype *cft, if (buffer == NULL) return -ENOMEM; } - if (nbytes && copy_from_user(buffer, userbuf, nbytes)) - return -EFAULT; + if (nbytes && copy_from_user(buffer, userbuf, nbytes)) { + retval = -EFAULT; + goto out; + } buffer[nbytes] = 0; /* nul-terminate */ strstrip(buffer); retval = cft->write_string(cgrp, cft, buffer); if (!retval) retval = nbytes; +out: if (buffer != local_buffer) kfree(buffer); return retval; @@ -2371,7 +2368,7 @@ static int cgroup_mkdir(struct inode *dir, struct dentry *dentry, int mode) return cgroup_create(c_parent, dentry, mode | S_IFDIR); } -static inline int cgroup_has_css_refs(struct cgroup *cgrp) +static int cgroup_has_css_refs(struct cgroup *cgrp) { /* Check the reference count on each subsystem. Since we * already established that there are no tasks in the |