slab: do ClearSlabPfmemalloc() for all pages of slab

[pandora-kernel.git] / kernel / sys.c

diff --git a/kernel/sys.c b/kernel/sys.c
index 2d39a84..241507f 100644 (file)
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -2015,7 +2015,6 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
                                break;
                        }
                        me->pdeath_signal = arg2;
-                       error = 0;
                        break;
                case PR_GET_PDEATHSIG:
                        error = put_user(me->pdeath_signal, (int __user *)arg2);
@@ -2029,7 +2028,6 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
                                break;
                        }
                        set_dumpable(me->mm, arg2);
-                       error = 0;
                        break;
 
                case PR_SET_UNALIGN:
@@ -2056,10 +2054,7 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
                case PR_SET_TIMING:
                        if (arg2 != PR_TIMING_STATISTICAL)
                                error = -EINVAL;
-                       else
-                               error = 0;
                        break;
-
                case PR_SET_NAME:
                        comm[sizeof(me->comm)-1] = 0;
                        if (strncpy_from_user(comm, (char __user *)arg2,
@@ -2067,20 +2062,19 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
                                return -EFAULT;
                        set_task_comm(me, comm);
                        proc_comm_connector(me);
-                       return 0;
+                       break;
                case PR_GET_NAME:
                        get_task_comm(comm, me);
                        if (copy_to_user((char __user *)arg2, comm,
                                         sizeof(comm)))
                                return -EFAULT;
-                       return 0;
+                       break;
                case PR_GET_ENDIAN:
                        error = GET_ENDIAN(me, arg2);
                        break;
                case PR_SET_ENDIAN:
                        error = SET_ENDIAN(me, arg2);
                        break;
-
                case PR_GET_SECCOMP:
                        error = prctl_get_seccomp();
                        break;
@@ -2108,7 +2102,6 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
                                        current->default_timer_slack_ns;
                        else
                                current->timer_slack_ns = arg2;
-                       error = 0;
                        break;
                case PR_MCE_KILL:
                        if (arg4 | arg5)
@@ -2134,7 +2127,6 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
                        default:
                                return -EINVAL;
                        }
-                       error = 0;
                        break;
                case PR_MCE_KILL_GET:
                        if (arg2 | arg3 | arg4 | arg5)
@@ -2153,7 +2145,6 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
                        break;
                case PR_SET_CHILD_SUBREAPER:
                        me->signal->is_child_subreaper = !!arg2;
-                       error = 0;
                        break;
                case PR_GET_CHILD_SUBREAPER:
                        error = put_user(me->signal->is_child_subreaper,
@@ -2195,46 +2186,52 @@ static void argv_cleanup(struct subprocess_info *info)
        argv_free(info->argv);
 }
 
-/**
- * orderly_poweroff - Trigger an orderly system poweroff
- * @force: force poweroff if command execution fails
- *
- * This may be called from any context to trigger a system shutdown.
- * If the orderly shutdown fails, it will force an immediate shutdown.
- */
-int orderly_poweroff(bool force)
+static int __orderly_poweroff(void)
 {
        int argc;
-       char **argv = argv_split(GFP_ATOMIC, poweroff_cmd, &argc);
+       char **argv;
        static char *envp[] = {
                "HOME=/",
                "PATH=/sbin:/bin:/usr/sbin:/usr/bin",
                NULL
        };
-       int ret = -ENOMEM;
+       int ret;
 
+       argv = argv_split(GFP_ATOMIC, poweroff_cmd, &argc);
        if (argv == NULL) {
                printk(KERN_WARNING "%s failed to allocate memory for \"%s\"\n",
                       __func__, poweroff_cmd);
-               goto out;
+               return -ENOMEM;
        }
 
        ret = call_usermodehelper_fns(argv[0], argv, envp, UMH_NO_WAIT,
                                      NULL, argv_cleanup, NULL);
-out:
-       if (likely(!ret))
-               return 0;
-
        if (ret == -ENOMEM)
                argv_free(argv);
 
-       if (force) {
+       return ret;
+}
+
+/**
+ * orderly_poweroff - Trigger an orderly system poweroff
+ * @force: force poweroff if command execution fails
+ *
+ * This may be called from any context to trigger a system shutdown.
+ * If the orderly shutdown fails, it will force an immediate shutdown.
+ */
+int orderly_poweroff(bool force)
+{
+       int ret = __orderly_poweroff();
+
+       if (ret && force) {
                printk(KERN_WARNING "Failed to start orderly shutdown: "
                       "forcing the issue\n");
 
-               /* I guess this should try to kick off some daemon to
-                  sync and poweroff asap.  Or not even bother syncing
-                  if we're doing an emergency shutdown? */
+               /*
+                * I guess this should try to kick off some daemon to sync and
+                * poweroff asap.  Or not even bother syncing if we're doing an
+                * emergency shutdown?
+                */
                emergency_sync();
                kernel_power_off();
        }