[PATCH] Don't need to disable interrupts for tasklist_lock (cf342e52) · Commits · e / devices / android_kernel_teracube_2e

fs/ioprio.c

+9 −4

Original line number	Original line	Diff line number	Diff line
	@@ -81,7 +81,12 @@ asmlinkage long sys_ioprio_set(int which, int who, int ioprio)
	}		}

	ret = -ESRCH;		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) {		switch (which) {
	case IOPRIO_WHO_PROCESS:		case IOPRIO_WHO_PROCESS:
	if (!who)		if (!who)
	@@ -124,7 +129,7 @@ asmlinkage long sys_ioprio_set(int which, int who, int ioprio)
	ret = -EINVAL;		ret = -EINVAL;
	}		}

	read_unlock_irq(&tasklist_lock);		read_unlock(&tasklist_lock);
	return ret;		return ret;
	}		}

	@@ -170,7 +175,7 @@ asmlinkage long sys_ioprio_get(int which, int who)
	int ret = -ESRCH;		int ret = -ESRCH;
	int tmpio;		int tmpio;

	read_lock_irq(&tasklist_lock);		read_lock(&tasklist_lock);
	switch (which) {		switch (which) {
	case IOPRIO_WHO_PROCESS:		case IOPRIO_WHO_PROCESS:
	if (!who)		if (!who)
	@@ -221,7 +226,7 @@ asmlinkage long sys_ioprio_get(int which, int who)
	ret = -EINVAL;		ret = -EINVAL;
	}		}

	read_unlock_irq(&tasklist_lock);		read_unlock(&tasklist_lock);
	return ret;		return ret;
	}		}