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>

diff --git a/fs/proc/array.c b/fs/proc/array.c
index fff6572..842a656 100644 (file)
--- 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 1f24a3e..659ea6a 100644 (file)
--- 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 c126c83..c3755bd 100644 (file)
--- 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 cb6306e..b535d3e 100644 (file)
--- 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)) {