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Commit 0c28f287 authored by Akinobu Mita's avatar Akinobu Mita Committed by Linus Torvalds
Browse files

procfs: use simple_read_from_buffer() 



Cleanup using simple_read_from_buffer() in procfs.

Signed-off-by: default avatarAkinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 34633993

fs/proc/base.c

+7 −28
Original line number Diff line number Diff line
@@ -660,7 +660,6 @@ static ssize_t oom_adjust_read(struct file *file, char __user *buf, 
	char buffer[PROC_NUMBUF];

	size_t len;

	int oom_adjust;

	loff_t __ppos = *ppos;



	if (!task)

		return -ESRCH;
@@ -668,14 +667,8 @@ static ssize_t oom_adjust_read(struct file *file, char __user *buf, 
	put_task_struct(task);



	len = snprintf(buffer, sizeof(buffer), "%i\n", oom_adjust);

	if (__ppos >= len)

		return 0;

	if (count > len-__ppos)

		count = len-__ppos;

	if (copy_to_user(buf, buffer + __ppos, count))

		return -EFAULT;

	*ppos = __ppos + count;

	return count;



	return simple_read_from_buffer(buf, count, ppos, buffer, len);

}



static ssize_t oom_adjust_write(struct file *file, const char __user *buf,
@@ -823,7 +816,6 @@ static ssize_t seccomp_read(struct file *file, char __user *buf, 
{

	struct task_struct *tsk = get_proc_task(file->f_dentry->d_inode);

	char __buf[20];

	loff_t __ppos = *ppos;

	size_t len;



	if (!tsk)
@@ -831,14 +823,8 @@ static ssize_t seccomp_read(struct file *file, char __user *buf, 
	/* no need to print the trailing zero, so use only len */

	len = sprintf(__buf, "%u\n", tsk->seccomp.mode);

	put_task_struct(tsk);

	if (__ppos >= len)

		return 0;

	if (count > len - __ppos)

		count = len - __ppos;

	if (copy_to_user(buf, __buf + __ppos, count))

		return -EFAULT;

	*ppos = __ppos + count;

	return count;



	return simple_read_from_buffer(buf, count, ppos, __buf, len);

}



static ssize_t seccomp_write(struct file *file, const char __user *buf,
@@ -897,7 +883,6 @@ static ssize_t proc_fault_inject_read(struct file * file, char __user * buf, 
	char buffer[PROC_NUMBUF];

	size_t len;

	int make_it_fail;

	loff_t __ppos = *ppos;



	if (!task)

		return -ESRCH;
@@ -905,14 +890,8 @@ static ssize_t proc_fault_inject_read(struct file * file, char __user * buf, 
	put_task_struct(task);



	len = snprintf(buffer, sizeof(buffer), "%i\n", make_it_fail);

	if (__ppos >= len)

		return 0;

	if (count > len-__ppos)

		count = len-__ppos;

	if (copy_to_user(buf, buffer + __ppos, count))

		return -EFAULT;

	*ppos = __ppos + count;

	return count;



	return simple_read_from_buffer(buf, count, ppos, buffer, len);

}



static ssize_t proc_fault_inject_write(struct file * file,