diff options
Diffstat (limited to 'fs/proc/task_mmu.c')
| -rw-r--r-- | fs/proc/task_mmu.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index b0ae0be..6f61b7c 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -204,6 +204,7 @@ static void show_map_vma(struct seq_file *m, struct vm_area_struct *vma) struct file *file = vma->vm_file; int flags = vma->vm_flags; unsigned long ino = 0; + unsigned long long pgoff = 0; dev_t dev = 0; int len; @@ -211,6 +212,7 @@ static void show_map_vma(struct seq_file *m, struct vm_area_struct *vma) struct inode *inode = vma->vm_file->f_path.dentry->d_inode; dev = inode->i_sb->s_dev; ino = inode->i_ino; + pgoff = ((loff_t)vma->vm_pgoff) << PAGE_SHIFT; } seq_printf(m, "%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu %n", @@ -220,7 +222,7 @@ static void show_map_vma(struct seq_file *m, struct vm_area_struct *vma) flags & VM_WRITE ? 'w' : '-', flags & VM_EXEC ? 'x' : '-', flags & VM_MAYSHARE ? 's' : 'p', - ((loff_t)vma->vm_pgoff) << PAGE_SHIFT, + pgoff, MAJOR(dev), MINOR(dev), ino, &len); /* @@ -663,6 +665,10 @@ static ssize_t pagemap_read(struct file *file, char __user *buf, goto out_task; ret = 0; + + if (!count) + goto out_task; + mm = get_task_mm(task); if (!mm) goto out_task; |