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| author | Alexey Dobriyan <adobriyan@gmail.com> | 2011-01-12 17:00:32 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-13 08:03:16 -0800 |
| commit | a2ade7b6ca37c808128810687cd56e8a44443e65 (patch) | |
| tree | d7ffb1be14e69f4ba22ca425c21369d4dd3a3032 /fs/proc | |
| parent | 34e49d4f635d6a800c4089c40fd254e12e451449 (diff) | |
| download | lwn-a2ade7b6ca37c808128810687cd56e8a44443e65.tar.gz lwn-a2ade7b6ca37c808128810687cd56e8a44443e65.zip | |
proc: use unsigned long inside /proc/*/statm
/proc/*/statm code needlessly truncates data from unsigned long to int.
One needs only 8+ TB of RAM to make truncation visible.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: WANG Cong <xiyou.wangcong@gmail.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/array.c | 6 | ||||
| -rw-r--r-- | fs/proc/internal.h | 3 | ||||
| -rw-r--r-- | fs/proc/task_mmu.c | 5 | ||||
| -rw-r--r-- | fs/proc/task_nommu.c | 7 |
4 files changed, 12 insertions, 9 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c index fff6572676ae..842a6564f2ce 100644 --- a/fs/proc/array.c +++ b/fs/proc/array.c @@ -535,15 +535,15 @@ int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns, int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns, struct pid *pid, struct task_struct *task) { - int size = 0, resident = 0, shared = 0, text = 0, lib = 0, data = 0; + unsigned long size = 0, resident = 0, shared = 0, text = 0, data = 0; struct mm_struct *mm = get_task_mm(task); if (mm) { size = task_statm(mm, &shared, &text, &data, &resident); mmput(mm); } - seq_printf(m, "%d %d %d %d %d %d %d\n", - size, resident, shared, text, lib, data, 0); + seq_printf(m, "%lu %lu %lu %lu 0 %lu 0\n", + size, resident, shared, text, data); return 0; } diff --git a/fs/proc/internal.h b/fs/proc/internal.h index 1f24a3eddd12..659ea6af379a 100644 --- a/fs/proc/internal.h +++ b/fs/proc/internal.h @@ -96,7 +96,8 @@ extern spinlock_t proc_subdir_lock; struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *); int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir); unsigned long task_vsize(struct mm_struct *); -int task_statm(struct mm_struct *, int *, int *, int *, int *); +unsigned long task_statm(struct mm_struct *, + unsigned long *, unsigned long *, unsigned long *, unsigned long *); void task_mem(struct seq_file *, struct mm_struct *); static inline struct proc_dir_entry *pde_get(struct proc_dir_entry *pde) diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index c126c83b9a45..c3755bd8dd3e 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -66,8 +66,9 @@ unsigned long task_vsize(struct mm_struct *mm) return PAGE_SIZE * mm->total_vm; } -int task_statm(struct mm_struct *mm, int *shared, int *text, - int *data, int *resident) +unsigned long task_statm(struct mm_struct *mm, + unsigned long *shared, unsigned long *text, + unsigned long *data, unsigned long *resident) { *shared = get_mm_counter(mm, MM_FILEPAGES); *text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c index cb6306e63843..b535d3e5d5f1 100644 --- a/fs/proc/task_nommu.c +++ b/fs/proc/task_nommu.c @@ -92,13 +92,14 @@ unsigned long task_vsize(struct mm_struct *mm) return vsize; } -int task_statm(struct mm_struct *mm, int *shared, int *text, - int *data, int *resident) +unsigned long task_statm(struct mm_struct *mm, + unsigned long *shared, unsigned long *text, + unsigned long *data, unsigned long *resident) { struct vm_area_struct *vma; struct vm_region *region; struct rb_node *p; - int size = kobjsize(mm); + unsigned long size = kobjsize(mm); down_read(&mm->mmap_sem); for (p = rb_first(&mm->mm_rb); p; p = rb_next(p)) { |