Adds a function for returning the value of a resource counter member, in a form suitable for use in a cgroup read_u64 control file method. Signed-off-by: Paul Menage --- include/linux/res_counter.h | 5 ++++- kernel/res_counter.c | 5 +++++ 2 files changed, 9 insertions(+), 1 deletion(-) Index: cgroup-2.6.25-rc2-mm1/include/linux/res_counter.h =================================================================== --- cgroup-2.6.25-rc2-mm1.orig/include/linux/res_counter.h +++ cgroup-2.6.25-rc2-mm1/include/linux/res_counter.h @@ -39,8 +39,9 @@ struct res_counter { spinlock_t lock; }; -/* +/** * 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 * @@ -51,6 +52,8 @@ struct res_counter { * @pos: and the offset. */ +u64 res_counter_read_u64(struct res_counter *counter, int member); + ssize_t res_counter_read(struct res_counter *counter, int member, const char __user *buf, size_t nbytes, loff_t *pos, int (*read_strategy)(unsigned long long val, char *s)); Index: cgroup-2.6.25-rc2-mm1/kernel/res_counter.c =================================================================== --- cgroup-2.6.25-rc2-mm1.orig/kernel/res_counter.c +++ cgroup-2.6.25-rc2-mm1/kernel/res_counter.c @@ -92,6 +92,11 @@ ssize_t res_counter_read(struct res_coun pos, buf, s - buf); } +u64 res_counter_read_u64(struct res_counter *counter, int member) +{ + return *res_counter_member(counter, member); +} + 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)) -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/