A new clear-refs type will be added in the next patch, so prepare
code for that.
Signed-off-by: Pavel Emelyanov <xemul@xxxxxxxxxxxxx>
---
fs/proc/task_mmu.c | 17 ++++++++++-------
1 files changed, 10 insertions(+), 7 deletions(-)
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 3e636d8..67c2586 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -688,6 +688,13 @@ const struct file_operations proc_tid_smaps_operations = {
.release = seq_release_private,
};
+enum clear_refs_types {
+ CLEAR_REFS_ALL = 1,
+ CLEAR_REFS_ANON,
+ CLEAR_REFS_MAPPED,
+ CLEAR_REFS_LAST,
+};
+
static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
unsigned long end, struct mm_walk *walk)
{
@@ -719,10 +726,6 @@ static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
return 0;
}
-#define CLEAR_REFS_ALL 1
-#define CLEAR_REFS_ANON 2
-#define CLEAR_REFS_MAPPED 3
-
static ssize_t clear_refs_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
@@ -730,7 +733,7 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf,
char buffer[PROC_NUMBUF];
struct mm_struct *mm;
struct vm_area_struct *vma;
- int type;
+ enum clear_refs_types type;
int rv;
memset(buffer, 0, sizeof(buffer));
@@ -738,10 +741,10 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf,
count = sizeof(buffer) - 1;
if (copy_from_user(buffer, buf, count))
return -EFAULT;
- rv = kstrtoint(strstrip(buffer), 10, &type);
+ rv = kstrtoint(strstrip(buffer), 10, (int *)&type);
if (rv < 0)
return rv;
- if (type < CLEAR_REFS_ALL || type > CLEAR_REFS_MAPPED)
+ if (type < CLEAR_REFS_ALL || type >= CLEAR_REFS_LAST)
return -EINVAL;
task = get_proc_task(file_inode(file));
if (!task)
--
1.7.6.5
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