DSS2: Add DSS2 support for SDP, Beagle, Overo, EVM

[pandora-kernel.git] / fs / ioprio.c

diff --git a/fs/ioprio.c b/fs/ioprio.c
index d6ff77e..da3cc46 100644 (file)
--- a/fs/ioprio.c
+++ b/fs/ioprio.c
@@ -41,18 +41,28 @@ static int set_task_ioprio(struct task_struct *task, int ioprio)
                return err;
 
        task_lock(task);
+       do {
+               ioc = task->io_context;
+               /* see wmb() in current_io_context() */
+               smp_read_barrier_depends();
+               if (ioc)
+                       break;
 
-       task->ioprio = ioprio;
-
-       ioc = task->io_context;
-       /* see wmb() in current_io_context() */
-       smp_read_barrier_depends();
+               ioc = alloc_io_context(GFP_ATOMIC, -1);
+               if (!ioc) {
+                       err = -ENOMEM;
+                       break;
+               }
+               task->io_context = ioc;
+       } while (1);
 
-       if (ioc)
+       if (!err) {
+               ioc->ioprio = ioprio;
                ioc->ioprio_changed = 1;
+       }
 
        task_unlock(task);
-       return 0;
+       return err;
 }
 
 asmlinkage long sys_ioprio_set(int which, int who, int ioprio)
@@ -75,8 +85,10 @@ asmlinkage long sys_ioprio_set(int which, int who, int ioprio)
 
                        break;
                case IOPRIO_CLASS_IDLE:
-                       if (!capable(CAP_SYS_ADMIN))
-                               return -EPERM;
+                       break;
+               case IOPRIO_CLASS_NONE:
+                       if (data)
+                               return -EINVAL;
                        break;
                default:
                        return -EINVAL;
@@ -103,11 +115,11 @@ asmlinkage long sys_ioprio_set(int which, int who, int ioprio)
                                pgrp = task_pgrp(current);
                        else
                                pgrp = find_vpid(who);
-                       do_each_pid_task(pgrp, PIDTYPE_PGID, p) {
+                       do_each_pid_thread(pgrp, PIDTYPE_PGID, p) {
                                ret = set_task_ioprio(p, ioprio);
                                if (ret)
                                        break;
-                       } while_each_pid_task(pgrp, PIDTYPE_PGID, p);
+                       } while_each_pid_thread(pgrp, PIDTYPE_PGID, p);
                        break;
                case IOPRIO_WHO_USER:
                        if (!who)
@@ -144,7 +156,9 @@ static int get_task_ioprio(struct task_struct *p)
        ret = security_task_getioprio(p);
        if (ret)
                goto out;
-       ret = p->ioprio;
+       ret = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_NONE, IOPRIO_NORM);
+       if (p->io_context)
+               ret = p->io_context->ioprio;
 out:
        return ret;
 }
@@ -190,7 +204,7 @@ asmlinkage long sys_ioprio_get(int which, int who)
                                pgrp = task_pgrp(current);
                        else
                                pgrp = find_vpid(who);
-                       do_each_pid_task(pgrp, PIDTYPE_PGID, p) {
+                       do_each_pid_thread(pgrp, PIDTYPE_PGID, p) {
                                tmpio = get_task_ioprio(p);
                                if (tmpio < 0)
                                        continue;
@@ -198,7 +212,7 @@ asmlinkage long sys_ioprio_get(int which, int who)
                                        ret = tmpio;
                                else
                                        ret = ioprio_best(ret, tmpio);
-                       } while_each_pid_task(pgrp, PIDTYPE_PGID, p);
+                       } while_each_pid_thread(pgrp, PIDTYPE_PGID, p);
                        break;
                case IOPRIO_WHO_USER:
                        if (!who)