Messages in this thread Patch in this message | | | Date | Tue, 11 Mar 2008 19:08:39 +0900 | From | Li Zefan <> | Subject | [PATCH 1/3] res_counter: introduce res_counter_write_u64() |
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This function can be used to assign the value of a resource counter member.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> --- 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
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