From ba630e4940924ad1962883c207a62890778ced63 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Tue, 12 Mar 2013 11:30:04 -0700 Subject: cpumask: implement cpumask_parse() We have cpulist_parse() but not cpumask_parse(). Implement it using bitmap_parse(). bitmap_parse() is weird in that it takes @len for a string in kernel-memory which also is inconsistent with bitmap_parselist(). Make cpumask_parse() calculate the length and don't expose the inconsistency to cpumask users. Maybe we can fix up bitmap_parse() later. This will be used to expose workqueue cpumask knobs to userland via sysfs. Signed-off-by: Tejun Heo Cc: Rusty Russell --- include/linux/cpumask.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'include/linux/cpumask.h') diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h index 032560295fcb..d08e4d2a9b92 100644 --- a/include/linux/cpumask.h +++ b/include/linux/cpumask.h @@ -590,6 +590,21 @@ static inline int cpulist_scnprintf(char *buf, int len, nr_cpumask_bits); } +/** + * cpumask_parse - extract a cpumask from from a string + * @buf: the buffer to extract from + * @dstp: the cpumask to set. + * + * Returns -errno, or 0 for success. + */ +static inline int cpumask_parse(const char *buf, struct cpumask *dstp) +{ + char *nl = strchr(buf, '\n'); + int len = nl ? nl - buf : strlen(buf); + + return bitmap_parse(buf, len, cpumask_bits(dstp), nr_cpumask_bits); +} + /** * cpulist_parse - extract a cpumask from a user string of ranges * @buf: the buffer to extract from -- cgit v1.2.3-59-g8ed1b