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Diffstat (limited to 'mm/mempolicy.c')
-rw-r--r--mm/mempolicy.c50
1 files changed, 32 insertions, 18 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 643f66e1018..8034abd3a13 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -806,9 +806,13 @@ static long do_get_mempolicy(int *policy, nodemask_t *nmask,
err = 0;
if (nmask) {
- task_lock(current);
- get_policy_nodemask(pol, nmask);
- task_unlock(current);
+ if (mpol_store_user_nodemask(pol)) {
+ *nmask = pol->w.user_nodemask;
+ } else {
+ task_lock(current);
+ get_policy_nodemask(pol, nmask);
+ task_unlock(current);
+ }
}
out:
@@ -2195,8 +2199,8 @@ int mpol_parse_str(char *str, struct mempolicy **mpol, int no_context)
char *rest = nodelist;
while (isdigit(*rest))
rest++;
- if (!*rest)
- err = 0;
+ if (*rest)
+ goto out;
}
break;
case MPOL_INTERLEAVE:
@@ -2205,7 +2209,6 @@ int mpol_parse_str(char *str, struct mempolicy **mpol, int no_context)
*/
if (!nodelist)
nodes = node_states[N_HIGH_MEMORY];
- err = 0;
break;
case MPOL_LOCAL:
/*
@@ -2215,11 +2218,19 @@ int mpol_parse_str(char *str, struct mempolicy **mpol, int no_context)
goto out;
mode = MPOL_PREFERRED;
break;
-
- /*
- * case MPOL_BIND: mpol_new() enforces non-empty nodemask.
- * case MPOL_DEFAULT: mpol_new() enforces empty nodemask, ignores flags.
- */
+ case MPOL_DEFAULT:
+ /*
+ * Insist on a empty nodelist
+ */
+ if (!nodelist)
+ err = 0;
+ goto out;
+ case MPOL_BIND:
+ /*
+ * Insist on a nodelist
+ */
+ if (!nodelist)
+ goto out;
}
mode_flags = 0;
@@ -2233,13 +2244,14 @@ int mpol_parse_str(char *str, struct mempolicy **mpol, int no_context)
else if (!strcmp(flags, "relative"))
mode_flags |= MPOL_F_RELATIVE_NODES;
else
- err = 1;
+ goto out;
}
new = mpol_new(mode, mode_flags, &nodes);
if (IS_ERR(new))
- err = 1;
- else {
+ goto out;
+
+ {
int ret;
NODEMASK_SCRATCH(scratch);
if (scratch) {
@@ -2250,13 +2262,15 @@ int mpol_parse_str(char *str, struct mempolicy **mpol, int no_context)
ret = -ENOMEM;
NODEMASK_SCRATCH_FREE(scratch);
if (ret) {
- err = 1;
mpol_put(new);
- } else if (no_context) {
- /* save for contextualization */
- new->w.user_nodemask = nodes;
+ goto out;
}
}
+ err = 0;
+ if (no_context) {
+ /* save for contextualization */
+ new->w.user_nodemask = nodes;
+ }
out:
/* Restore string for error message */