On Thu 09-08-12 17:01:11, Glauber Costa wrote:
> This is just a cleanup patch for clarity of expression. In earlier
> submissions, people asked it to be in a separate patch, so here it is.
>
> [ v2: use named enum as type throughout the file as well ]
>
> Signed-off-by: Glauber Costa <glommer@xxxxxxxxxxxxx>
> CC: Michal Hocko <mhocko@xxxxxxx>
> CC: Johannes Weiner <hannes@xxxxxxxxxxx>
> Acked-by: Kamezawa Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxx>
> ---
> mm/memcontrol.c | 26 ++++++++++++++++----------
> 1 file changed, 16 insertions(+), 10 deletions(-)
>
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index 2cef99a..b0e29f4 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -393,9 +393,12 @@ enum charge_type {
> };
>
> /* for encoding cft->private value on file */
> -#define _MEM (0)
> -#define _MEMSWAP (1)
> -#define _OOM_TYPE (2)
> +enum res_type {
> + _MEM,
> + _MEMSWAP,
> + _OOM_TYPE,
> +};
> +
> #define MEMFILE_PRIVATE(x, val) ((x) << 16 | (val))
> #define MEMFILE_TYPE(val) ((val) >> 16 & 0xffff)
> #define MEMFILE_ATTR(val) ((val) & 0xffff)
> @@ -3983,7 +3986,8 @@ static ssize_t mem_cgroup_read(struct cgroup *cont, struct cftype *cft,
> struct mem_cgroup *memcg = mem_cgroup_from_cont(cont);
> char str[64];
> u64 val;
> - int type, name, len;
> + int name, len;
> + enum res_type type;
>
> type = MEMFILE_TYPE(cft->private);
> name = MEMFILE_ATTR(cft->private);
> @@ -4019,7 +4023,8 @@ static int mem_cgroup_write(struct cgroup *cont, struct cftype *cft,
> const char *buffer)
> {
> struct mem_cgroup *memcg = mem_cgroup_from_cont(cont);
> - int type, name;
> + enum res_type type;
> + int name;
> unsigned long long val;
> int ret;
>
> @@ -4095,7 +4100,8 @@ out:
> static int mem_cgroup_reset(struct cgroup *cont, unsigned int event)
> {
> struct mem_cgroup *memcg = mem_cgroup_from_cont(cont);
> - int type, name;
> + int name;
> + enum res_type type;
>
> type = MEMFILE_TYPE(event);
> name = MEMFILE_ATTR(event);
> @@ -4423,7 +4429,7 @@ static int mem_cgroup_usage_register_event(struct cgroup *cgrp,
> struct mem_cgroup *memcg = mem_cgroup_from_cont(cgrp);
> struct mem_cgroup_thresholds *thresholds;
> struct mem_cgroup_threshold_ary *new;
> - int type = MEMFILE_TYPE(cft->private);
> + enum res_type type = MEMFILE_TYPE(cft->private);
> u64 threshold, usage;
> int i, size, ret;
>
> @@ -4506,7 +4512,7 @@ static void mem_cgroup_usage_unregister_event(struct cgroup *cgrp,
> struct mem_cgroup *memcg = mem_cgroup_from_cont(cgrp);
> struct mem_cgroup_thresholds *thresholds;
> struct mem_cgroup_threshold_ary *new;
> - int type = MEMFILE_TYPE(cft->private);
> + enum res_type type = MEMFILE_TYPE(cft->private);
> u64 usage;
> int i, j, size;
>
> @@ -4584,7 +4590,7 @@ static int mem_cgroup_oom_register_event(struct cgroup *cgrp,
> {
> struct mem_cgroup *memcg = mem_cgroup_from_cont(cgrp);
> struct mem_cgroup_eventfd_list *event;
> - int type = MEMFILE_TYPE(cft->private);
> + enum res_type type = MEMFILE_TYPE(cft->private);
>
> BUG_ON(type != _OOM_TYPE);
> event = kmalloc(sizeof(*event), GFP_KERNEL);
> @@ -4609,7 +4615,7 @@ static void mem_cgroup_oom_unregister_event(struct cgroup *cgrp,
> {
> struct mem_cgroup *memcg = mem_cgroup_from_cont(cgrp);
> struct mem_cgroup_eventfd_list *ev, *tmp;
> - int type = MEMFILE_TYPE(cft->private);
> + enum res_type type = MEMFILE_TYPE(cft->private);
>
> BUG_ON(type != _OOM_TYPE);
>
> --
> 1.7.11.2
>
> --
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--
Michal Hocko
SUSE Labs
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