From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <47D65A27.80605@cn.fujitsu.com> Date: Tue, 11 Mar 2008 19:08:39 +0900 From: Li Zefan MIME-Version: 1.0 Subject: [PATCH 1/3] res_counter: introduce res_counter_write_u64() Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton Cc: Balbir Singh , KAMEZAWA Hiroyuki , Pavel Emelianov , Paul Menage , LKML , linux-mm@kvack.org, Linux Containers List-ID: This function can be used to assign the value of a resource counter member. Signed-off-by: Li Zefan --- include/linux/res_counter.h | 9 ++++++--- kernel/res_counter.c | 9 +++++++++ 2 files changed, 15 insertions(+), 3 deletions(-) diff --git a/include/linux/res_counter.h b/include/linux/res_counter.h index 8cb1ecd..8c23f7f 100644 --- a/include/linux/res_counter.h +++ b/include/linux/res_counter.h @@ -41,9 +41,10 @@ struct res_counter { /** * Helpers to interact with userspace - * res_counter_read_u64() - returns the value of the specified member. - * res_counter_read/_write - put/get the specified fields from the - * res_counter struct to/from the user + * res_counter_read_64/_write_u64 - returns/assigns the value of the + * specified member + * res_counter_read/_write - puts/gets the specified fields from the + * res_counter struct to/from the user * * @counter: the counter in question * @member: the field to work with (see RES_xxx below) @@ -53,6 +54,8 @@ struct res_counter { */ u64 res_counter_read_u64(struct res_counter *counter, int member); +void res_counter_write_u64(struct res_counter *counter, int member, + unsigned long long val); ssize_t res_counter_read(struct res_counter *counter, int member, const char __user *buf, size_t nbytes, loff_t *pos, diff --git a/kernel/res_counter.c b/kernel/res_counter.c index 791ff2b..a16b727 100644 --- a/kernel/res_counter.c +++ b/kernel/res_counter.c @@ -97,6 +97,15 @@ u64 res_counter_read_u64(struct res_counter *counter, int member) return *res_counter_member(counter, member); } +void res_counter_write_u64(struct res_counter *counter, int member, + unsigned long long val) +{ + unsigned long long *tmp; + + tmp = res_counter_member(counter, member); + *tmp = val; +} + ssize_t res_counter_write(struct res_counter *counter, int member, const char __user *userbuf, size_t nbytes, loff_t *pos, int (*write_strategy)(char *st_buf, unsigned long long *val)) -- 1.5.4.rc3 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org