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Diffstat (limited to 'mm/mempolicy.c')
-rw-r--r--mm/mempolicy.c29
1 files changed, 17 insertions, 12 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index acb5ee3587c3..1311dc4a3888 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -114,7 +114,7 @@ static void mpol_rebind_policy(struct mempolicy *pol,
const nodemask_t *newmask);
/* Do sanity checking on a policy */
-static int mpol_check_policy(int mode, nodemask_t *nodes)
+static int mpol_check_policy(unsigned short mode, nodemask_t *nodes)
{
int was_empty, is_empty;
@@ -159,6 +159,8 @@ static int mpol_check_policy(int mode, nodemask_t *nodes)
if (!was_empty && is_empty)
return -EINVAL;
break;
+ default:
+ BUG();
}
return 0;
}
@@ -185,7 +187,7 @@ static int is_valid_nodemask(nodemask_t *nodemask)
}
/* Create a new policy */
-static struct mempolicy *mpol_new(int mode, nodemask_t *nodes)
+static struct mempolicy *mpol_new(unsigned short mode, nodemask_t *nodes)
{
struct mempolicy *policy;
@@ -218,6 +220,8 @@ static struct mempolicy *mpol_new(int mode, nodemask_t *nodes)
}
policy->v.nodes = *nodes;
break;
+ default:
+ BUG();
}
policy->policy = mode;
policy->cpuset_mems_allowed = cpuset_mems_allowed(current);
@@ -462,7 +466,7 @@ static void mpol_set_task_struct_flag(void)
}
/* Set the process memory policy */
-static long do_set_mempolicy(int mode, nodemask_t *nodes)
+static long do_set_mempolicy(unsigned short mode, nodemask_t *nodes)
{
struct mempolicy *new;
@@ -759,7 +763,7 @@ static struct page *new_vma_page(struct page *page, unsigned long private, int *
#endif
static long do_mbind(unsigned long start, unsigned long len,
- unsigned long mode, nodemask_t *nmask,
+ unsigned short mode, nodemask_t *nmask,
unsigned long flags)
{
struct vm_area_struct *vma;
@@ -769,9 +773,8 @@ static long do_mbind(unsigned long start, unsigned long len,
int err;
LIST_HEAD(pagelist);
- if ((flags & ~(unsigned long)(MPOL_MF_STRICT |
- MPOL_MF_MOVE | MPOL_MF_MOVE_ALL))
- || mode > MPOL_MAX)
+ if (flags & ~(unsigned long)(MPOL_MF_STRICT |
+ MPOL_MF_MOVE | MPOL_MF_MOVE_ALL))
return -EINVAL;
if ((flags & MPOL_MF_MOVE_ALL) && !capable(CAP_SYS_NICE))
return -EPERM;
@@ -804,7 +807,7 @@ static long do_mbind(unsigned long start, unsigned long len,
if (!new)
flags |= MPOL_MF_DISCONTIG_OK;
- pr_debug("mbind %lx-%lx mode:%ld nodes:%lx\n",start,start+len,
+ pr_debug("mbind %lx-%lx mode:%d nodes:%lx\n", start, start + len,
mode, nmask ? nodes_addr(*nmask)[0] : -1);
down_write(&mm->mmap_sem);
@@ -905,6 +908,8 @@ asmlinkage long sys_mbind(unsigned long start, unsigned long len,
nodemask_t nodes;
int err;
+ if (mode >= MPOL_MAX)
+ return -EINVAL;
err = get_nodes(&nodes, nmask, maxnode);
if (err)
return err;
@@ -918,7 +923,7 @@ asmlinkage long sys_set_mempolicy(int mode, unsigned long __user *nmask,
int err;
nodemask_t nodes;
- if (mode < 0 || mode > MPOL_MAX)
+ if (mode < 0 || mode >= MPOL_MAX)
return -EINVAL;
err = get_nodes(&nodes, nmask, maxnode);
if (err)
@@ -1201,7 +1206,7 @@ static unsigned interleave_nodes(struct mempolicy *policy)
*/
unsigned slab_node(struct mempolicy *policy)
{
- int pol = policy ? policy->policy : MPOL_DEFAULT;
+ unsigned short pol = policy ? policy->policy : MPOL_DEFAULT;
switch (pol) {
case MPOL_INTERLEAVE:
@@ -1635,7 +1640,7 @@ restart:
return 0;
}
-void mpol_shared_policy_init(struct shared_policy *info, int policy,
+void mpol_shared_policy_init(struct shared_policy *info, unsigned short policy,
nodemask_t *policy_nodes)
{
info->root = RB_ROOT;
@@ -1830,7 +1835,7 @@ static inline int mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol)
char *p = buffer;
int l;
nodemask_t nodes;
- int mode = pol ? pol->policy : MPOL_DEFAULT;
+ unsigned short mode = pol ? pol->policy : MPOL_DEFAULT;
switch (mode) {
case MPOL_DEFAULT: