From 2da8ca822d49c8b8781800ad155aaa00e7bb5f1a Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Thu, 5 Dec 2013 12:28:04 -0500 Subject: 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 Acked-by: Aristeu Rozanski Acked-by: Vivek Goyal Acked-by: Michal Hocko Acked-by: Daniel Wagner Acked-by: Li Zefan Cc: Jens Axboe Cc: Ingo Molnar Cc: Peter Zijlstra Cc: Johannes Weiner Cc: Balbir Singh Cc: KAMEZAWA Hiroyuki Cc: Neil Horman --- kernel/cpuset.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) (limited to 'kernel/cpuset.c') 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, -- cgit v1.2.3