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authorTejun Heo <tj@kernel.org>2013-12-05 12:28:04 -0500
committerTejun Heo <tj@kernel.org>2013-12-05 12:28:04 -0500
commit2da8ca822d49c8b8781800ad155aaa00e7bb5f1a (patch)
tree9ec6b0a7a009d76d0c607640eae64d3e9ed666a9 /kernel/cpuset.c
parent7da112792753d71aed44b918395892a1fc53048a (diff)
downloadlinux-2da8ca822d49c8b8781800ad155aaa00e7bb5f1a.tar.bz2
cgroup: replace cftype->read_seq_string() with cftype->seq_show()
In preparation of conversion to kernfs, cgroup file handling is updated so that it can be easily mapped to kernfs. This patch replaces cftype->read_seq_string() with cftype->seq_show() which is not limited to single_open() operation and will map directcly to kernfs seq_file interface. The conversions are mechanical. As ->seq_show() doesn't have @css and @cft, the functions which make use of them are converted to use seq_css() and seq_cft() respectively. In several occassions, e.f. if it has seq_string in its name, the function name is updated to fit the new method better. This patch does not introduce any behavior changes. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Aristeu Rozanski <arozansk@redhat.com> Acked-by: Vivek Goyal <vgoyal@redhat.com> Acked-by: Michal Hocko <mhocko@suse.cz> Acked-by: Daniel Wagner <daniel.wagner@bmw-carit.de> Acked-by: Li Zefan <lizefan@huawei.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Ingo Molnar <mingo@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Balbir Singh <bsingharora@gmail.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Neil Horman <nhorman@tuxdriver.com>
Diffstat (limited to 'kernel/cpuset.c')
-rw-r--r--kernel/cpuset.c12
1 files changed, 5 insertions, 7 deletions
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 032929f91648..4410ac6a55f1 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -1732,12 +1732,10 @@ out_unlock:
* and since these maps can change value dynamically, one could read
* gibberish by doing partial reads while a list was changing.
*/
-static int cpuset_common_read_seq_string(struct cgroup_subsys_state *css,
- struct cftype *cft,
- struct seq_file *sf)
+static int cpuset_common_seq_show(struct seq_file *sf, void *v)
{
- struct cpuset *cs = css_cs(css);
- cpuset_filetype_t type = cft->private;
+ struct cpuset *cs = css_cs(seq_css(sf));
+ cpuset_filetype_t type = seq_cft(sf)->private;
ssize_t count;
char *buf, *s;
int ret = 0;
@@ -1824,7 +1822,7 @@ static s64 cpuset_read_s64(struct cgroup_subsys_state *css, struct cftype *cft)
static struct cftype files[] = {
{
.name = "cpus",
- .read_seq_string = cpuset_common_read_seq_string,
+ .seq_show = cpuset_common_seq_show,
.write_string = cpuset_write_resmask,
.max_write_len = (100U + 6 * NR_CPUS),
.private = FILE_CPULIST,
@@ -1832,7 +1830,7 @@ static struct cftype files[] = {
{
.name = "mems",
- .read_seq_string = cpuset_common_read_seq_string,
+ .seq_show = cpuset_common_seq_show,
.write_string = cpuset_write_resmask,
.max_write_len = (100U + 6 * MAX_NUMNODES),
.private = FILE_MEMLIST,