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seq_file: add seq_cpumask_list(), seq_nodemask_list() 

seq_cpumask_list(), seq_nodemask_list() are very like seq_cpumask(),
seq_nodemask(), but they print human readable string.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Paul Menage <menage@google.com>
Cc: Paul Jackson <pj@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Lai Jiangshan 2008-10-18 20:28:19 -07:00 committed by Linus Torvalds
parent 85dd030edb
commit 3eda201180
2 changed files with 29 additions and 0 deletions
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16
fs/seq_file.c
View File

@ -465,6 +465,22 @@ int seq_bitmap(struct seq_file *m, unsigned long *bits, unsigned int nr_bits)
}
EXPORT_SYMBOL(seq_bitmap);
int seq_bitmap_list(struct seq_file *m, unsigned long *bits,
unsigned int nr_bits)
{
if (m->count < m->size) {
int len = bitmap_scnlistprintf(m->buf + m->count,
m->size - m->count, bits, nr_bits);
if (m->count + len < m->size) {
m->count += len;
return 0;
}
}
m->count = m->size;
return -1;
}
EXPORT_SYMBOL(seq_bitmap_list);
static void *single_start(struct seq_file *p, loff_t *pos)
{
return NULL + (*pos == 0);

13
include/linux/seq_file.h
View File

@ -60,6 +60,19 @@ static inline int seq_nodemask(struct seq_file *m, nodemask_t *mask)
return seq_bitmap(m, mask->bits, MAX_NUMNODES);
}
int seq_bitmap_list(struct seq_file *m, unsigned long *bits,
unsigned int nr_bits);
static inline int seq_cpumask_list(struct seq_file *m, cpumask_t *mask)
{
return seq_bitmap_list(m, mask->bits, NR_CPUS);
}
static inline int seq_nodemask_list(struct seq_file *m, nodemask_t *mask)
{
return seq_bitmap_list(m, mask->bits, MAX_NUMNODES);
}
int single_open(struct file *, int (*)(struct seq_file *, void *), void *);
int single_release(struct inode *, struct file *);
void *__seq_open_private(struct file *, const struct seq_operations *, int);