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proc: introduce proc_create_single{,_data}

Browse source 
Variants of proc_create{,_data} that directly take a seq_file show
callback and drastically reduces the boilerplate code in the callers.

All trivial callers converted over.

Signed-off-by: Christoph Hellwig <[email protected]>
This commit is contained in:
Christoph Hellwig 2018-05-15 15:57:23 +02:00
commit 3f3942aca6
85 changed files with 235 additions and 1509 deletions
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2
fs/fscache/internal.h
View file

@ -295,7 +295,7 @@ static inline void fscache_stat_d(atomic_t *stat)
#define __fscache_stat(stat) (stat)
extern const struct file_operations fscache_stats_fops;
int fscache_stats_show(struct seq_file *m, void *v);
#else
#define __fscache_stat(stat) (NULL)

4
fs/fscache/proc.c
View file

@ -26,8 +26,8 @@ int __init fscache_proc_init(void)
goto error_dir;
#ifdef CONFIG_FSCACHE_STATS
if (!proc_create("fs/fscache/stats", S_IFREG | 0444, NULL,
&fscache_stats_fops))
if (!proc_create_single("fs/fscache/stats", S_IFREG | 0444, NULL,
fscache_stats_show))
goto error_stats;
#endif

17
fs/fscache/stats.c
View file

@ -138,7 +138,7 @@ atomic_t fscache_n_cache_culled_objects;
/*
* display the general statistics
*/
static int fscache_stats_show(struct seq_file *m, void *v)
int fscache_stats_show(struct seq_file *m, void *v)
{
seq_puts(m, "FS-Cache statistics\n");
@ -284,18 +284,3 @@ static int fscache_stats_show(struct seq_file *m, void *v)
atomic_read(&fscache_n_cache_culled_objects));
return 0;
}
/*
* open "/proc/fs/fscache/stats" allowing provision of a statistical summary
*/
static int fscache_stats_open(struct inode *inode, struct file *file)
{
return single_open(file, fscache_stats_show, NULL);
}
const struct file_operations fscache_stats_fops = {
.open = fscache_stats_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};