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authorDavid S. Miller <davem@davemloft.net>2016-02-23 00:09:14 -0500
committerDavid S. Miller <davem@davemloft.net>2016-02-23 00:09:14 -0500
commitb633353115e352d3c31c12d4c61978c810f05ea1 (patch)
tree055174a1b31a3e10fd2c505788fe6487b0028d00 /fs/proc/task_nommu.c
parentb1d95ae5c5bd3deba84d00c4f83d7d0836b5936f (diff)
parentdea08e604408d0303e2332896c5fdd8c1f7d79a2 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts: drivers/net/phy/bcm7xxx.c drivers/net/phy/marvell.c drivers/net/vxlan.c All three conflicts were cases of simple overlapping changes. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'fs/proc/task_nommu.c')
-rw-r--r--fs/proc/task_nommu.c49
1 files changed, 20 insertions, 29 deletions
diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c
index e0d64c92e4f6..faacb0c0d857 100644
--- a/fs/proc/task_nommu.c
+++ b/fs/proc/task_nommu.c
@@ -123,23 +123,26 @@ unsigned long task_statm(struct mm_struct *mm,
return size;
}
-static pid_t pid_of_stack(struct proc_maps_private *priv,
- struct vm_area_struct *vma, bool is_pid)
+static int is_stack(struct proc_maps_private *priv,
+ struct vm_area_struct *vma, int is_pid)
{
- struct inode *inode = priv->inode;
- struct task_struct *task;
- pid_t ret = 0;
-
- rcu_read_lock();
- task = pid_task(proc_pid(inode), PIDTYPE_PID);
- if (task) {
- task = task_of_stack(task, vma, is_pid);
+ struct mm_struct *mm = vma->vm_mm;
+ int stack = 0;
+
+ if (is_pid) {
+ stack = vma->vm_start <= mm->start_stack &&
+ vma->vm_end >= mm->start_stack;
+ } else {
+ struct inode *inode = priv->inode;
+ struct task_struct *task;
+
+ rcu_read_lock();
+ task = pid_task(proc_pid(inode), PIDTYPE_PID);
if (task)
- ret = task_pid_nr_ns(task, inode->i_sb->s_fs_info);
+ stack = vma_is_stack_for_task(vma, task);
+ rcu_read_unlock();
}
- rcu_read_unlock();
-
- return ret;
+ return stack;
}
/*
@@ -181,21 +184,9 @@ static int nommu_vma_show(struct seq_file *m, struct vm_area_struct *vma,
if (file) {
seq_pad(m, ' ');
seq_file_path(m, file, "");
- } else if (mm) {
- pid_t tid = pid_of_stack(priv, vma, is_pid);
-
- if (tid != 0) {
- seq_pad(m, ' ');
- /*
- * Thread stack in /proc/PID/task/TID/maps or
- * the main process stack.
- */
- if (!is_pid || (vma->vm_start <= mm->start_stack &&
- vma->vm_end >= mm->start_stack))
- seq_printf(m, "[stack]");
- else
- seq_printf(m, "[stack:%d]", tid);
- }
+ } else if (mm && is_stack(priv, vma, is_pid)) {
+ seq_pad(m, ' ');
+ seq_printf(m, "[stack]");
}
seq_putc(m, '\n');