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Add cgroup write_uint() helper method

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Add write_uint() helper method for cgroup subsystems

This helper is analagous to the read_uint() helper method for
reporting u64 values to userspace. It's designed to reduce the amount
of boilerplate requierd for creating new cgroup subsystems.

Signed-off-by: Paul Menage <menage@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Paul Menage
2007-10-18 23:39:33 -07:00
committed by Linus Torvalds
parent bbcb81d091
commit 355e0c48b7
2 changed files with 46 additions and 4 deletions
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8
include/linux/cgroup.h
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@ -125,6 +125,14 @@ struct cftype {
ssize_t (*write) (struct cgroup *cont, struct cftype *cft,
struct file *file,
const char __user *buf, size_t nbytes, loff_t *ppos);
/*
* write_uint() is a shortcut for the common case of accepting
* a single integer (as parsed by simple_strtoull) from
* userspace. Use in place of write(); return 0 or error.
*/
int (*write_uint) (struct cgroup *cont, struct cftype *cft, u64 val);
int (*release) (struct inode *inode, struct file *file);
};