Commit cf342e52 authored by Oleg Nesterov's avatar Oleg Nesterov Committed by Jens Axboe

[PATCH] Don't need to disable interrupts for tasklist_lock

Signed-off-by: default avatarOleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 25034d7a
......@@ -81,7 +81,12 @@ asmlinkage long sys_ioprio_set(int which, int who, int ioprio)
}
ret = -ESRCH;
read_lock_irq(&tasklist_lock);
/*
* We want IOPRIO_WHO_PGRP/IOPRIO_WHO_USER to be "atomic",
* so we can't use rcu_read_lock(). See re-copy of ->ioprio
* in copy_process().
*/
read_lock(&tasklist_lock);
switch (which) {
case IOPRIO_WHO_PROCESS:
if (!who)
......@@ -124,7 +129,7 @@ asmlinkage long sys_ioprio_set(int which, int who, int ioprio)
ret = -EINVAL;
}
read_unlock_irq(&tasklist_lock);
read_unlock(&tasklist_lock);
return ret;
}
......@@ -170,7 +175,7 @@ asmlinkage long sys_ioprio_get(int which, int who)
int ret = -ESRCH;
int tmpio;
read_lock_irq(&tasklist_lock);
read_lock(&tasklist_lock);
switch (which) {
case IOPRIO_WHO_PROCESS:
if (!who)
......@@ -221,7 +226,7 @@ asmlinkage long sys_ioprio_get(int which, int who)
ret = -EINVAL;
}
read_unlock_irq(&tasklist_lock);
read_unlock(&tasklist_lock);
return ret;
}
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