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| author | Oleg Nesterov <oleg@redhat.com> | 2014-10-09 15:25:21 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-10-09 22:25:48 -0400 |
| commit | 4db7d0ee198d417f4144c58048fcb173d90096ea (patch) | |
| tree | ae5739057a1eb8d65d5b24ad7c5b8af87a548fa0 /fs/proc | |
| parent | 46c298cf69d0e9a27d33ff992a81bd7b441c7933 (diff) | |
| download | lwn-4db7d0ee198d417f4144c58048fcb173d90096ea.tar.gz lwn-4db7d0ee198d417f4144c58048fcb173d90096ea.zip | |
fs/proc/task_mmu.c: unify/simplify do_maps_open() and numa_maps_open()
do_maps_open() and numa_maps_open() are overcomplicated, they could use
__seq_open_private(). Plus they do the same, just sizeof(*priv)
Change them to use a new simple helper, proc_maps_open(ops, psize). This
simplifies the code and allows us to do the next changes.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/proc')
| -rw-r--r-- | fs/proc/task_mmu.c | 44 |
1 files changed, 16 insertions, 28 deletions
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index 289dfdc0ec09..4d716a09d500 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -231,23 +231,23 @@ static void m_stop(struct seq_file *m, void *v) put_task_struct(priv->task); } +static int proc_maps_open(struct inode *inode, struct file *file, + const struct seq_operations *ops, int psize) +{ + struct proc_maps_private *priv = __seq_open_private(file, ops, psize); + + if (!priv) + return -ENOMEM; + + priv->pid = proc_pid(inode); + return 0; +} + static int do_maps_open(struct inode *inode, struct file *file, const struct seq_operations *ops) { - struct proc_maps_private *priv; - int ret = -ENOMEM; - priv = kzalloc(sizeof(*priv), GFP_KERNEL); - if (priv) { - priv->pid = proc_pid(inode); - ret = seq_open(file, ops); - if (!ret) { - struct seq_file *m = file->private_data; - m->private = priv; - } else { - kfree(priv); - } - } - return ret; + return proc_maps_open(inode, file, ops, + sizeof(struct proc_maps_private)); } static void @@ -1526,20 +1526,8 @@ static const struct seq_operations proc_tid_numa_maps_op = { static int numa_maps_open(struct inode *inode, struct file *file, const struct seq_operations *ops) { - struct numa_maps_private *priv; - int ret = -ENOMEM; - priv = kzalloc(sizeof(*priv), GFP_KERNEL); - if (priv) { - priv->proc_maps.pid = proc_pid(inode); - ret = seq_open(file, ops); - if (!ret) { - struct seq_file *m = file->private_data; - m->private = priv; - } else { - kfree(priv); - } - } - return ret; + return proc_maps_open(inode, file, ops, + sizeof(struct numa_maps_private)); } static int pid_numa_maps_open(struct inode *inode, struct file *file) |