block: make variable and argument names more consistent
In hd_struct, @partno is used to denote partition number and a number
of other places use @part to denote hd_struct. Functions use @part
and @index instead. This causes confusion and makes it difficult to
use consistent variable names for hd_struct. Always use @partno if a
variable represents partition number.
Also, print out functions use @f or @part for seq_file argument. Use
@seqf uniformly instead.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/block/genhd.c b/block/genhd.c
index 11038fb..dc9ad4c 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -43,14 +43,14 @@
}
#ifdef CONFIG_PROC_FS
-void blkdev_show(struct seq_file *f, off_t offset)
+void blkdev_show(struct seq_file *seqf, off_t offset)
{
struct blk_major_name *dp;
if (offset < BLKDEV_MAJOR_HASH_SIZE) {
mutex_lock(&block_class_lock);
for (dp = major_names[offset]; dp; dp = dp->next)
- seq_printf(f, "%3d %s\n", dp->major, dp->name);
+ seq_printf(seqf, "%3d %s\n", dp->major, dp->name);
mutex_unlock(&block_class_lock);
}
}
@@ -157,7 +157,7 @@
EXPORT_SYMBOL(blk_unregister_region);
-static struct kobject *exact_match(dev_t devt, int *part, void *data)
+static struct kobject *exact_match(dev_t devt, int *partno, void *data)
{
struct gendisk *p = data;
@@ -217,9 +217,9 @@
* This function gets the structure containing partitioning
* information for the given device @devt.
*/
-struct gendisk *get_gendisk(dev_t devt, int *part)
+struct gendisk *get_gendisk(dev_t devt, int *partno)
{
- struct kobject *kobj = kobj_lookup(bdev_map, devt, part);
+ struct kobject *kobj = kobj_lookup(bdev_map, devt, partno);
struct device *dev = kobj_to_dev(kobj);
return kobj ? dev_to_disk(dev) : NULL;
@@ -336,23 +336,12 @@
return p;
}
-static int show_partition(struct seq_file *part, void *v)
+static int show_partition(struct seq_file *seqf, void *v)
{
struct gendisk *sgp = v;
int n;
char buf[BDEVNAME_SIZE];
- /*
- * Print header if start told us to do. This is to preserve
- * the original behavior of not printing header if no
- * partition exists. This hackery will be removed later with
- * class iteration clean up.
- */
- if (part->private) {
- seq_puts(part, "major minor #blocks name\n\n");
- part->private = NULL;
- }
-
/* Don't show non-partitionable removeable devices or empty devices */
if (!get_capacity(sgp) ||
(sgp->minors == 1 && (sgp->flags & GENHD_FL_REMOVABLE)))
@@ -361,7 +350,7 @@
return 0;
/* show the full disk and all non-0 size partitions of it */
- seq_printf(part, "%4d %4d %10llu %s\n",
+ seq_printf(seqf, "%4d %4d %10llu %s\n",
sgp->major, sgp->first_minor,
(unsigned long long)get_capacity(sgp) >> 1,
disk_name(sgp, 0, buf));
@@ -370,7 +359,7 @@
continue;
if (sgp->part[n]->nr_sects == 0)
continue;
- seq_printf(part, "%4d %4d %10llu %s\n",
+ seq_printf(seqf, "%4d %4d %10llu %s\n",
sgp->major, n + 1 + sgp->first_minor,
(unsigned long long)sgp->part[n]->nr_sects >> 1 ,
disk_name(sgp, n + 1, buf));
@@ -388,7 +377,7 @@
#endif
-static struct kobject *base_probe(dev_t devt, int *part, void *data)
+static struct kobject *base_probe(dev_t devt, int *partno, void *data)
{
if (request_module("block-major-%d-%d", MAJOR(devt), MINOR(devt)) > 0)
/* Make old-style 2.4 aliases work */
@@ -564,7 +553,14 @@
};
#ifdef CONFIG_PROC_FS
-static int diskstats_show(struct seq_file *s, void *v)
+/*
+ * aggregate disk stat collector. Uses the same stats that the sysfs
+ * entries do, above, but makes them available through one seq_file.
+ *
+ * The output looks suspiciously like /proc/partitions with a bunch of
+ * extra fields.
+ */
+static int diskstats_show(struct seq_file *seqf, void *v)
{
struct gendisk *gp = v;
char buf[BDEVNAME_SIZE];
@@ -572,7 +568,7 @@
/*
if (&gp->dev.kobj.entry == block_class.devices.next)
- seq_puts(s, "major minor name"
+ seq_puts(seqf, "major minor name"
" rio rmerge rsect ruse wio wmerge "
"wsect wuse running use aveq"
"\n\n");
@@ -581,7 +577,7 @@
preempt_disable();
disk_round_stats(gp);
preempt_enable();
- seq_printf(s, "%4d %4d %s %lu %lu %llu %u %lu %lu %llu %u %u %u %u\n",
+ seq_printf(seqf, "%4d %4d %s %lu %lu %llu %u %lu %lu %llu %u %u %u %u\n",
gp->major, gp->first_minor, disk_name(gp, 0, buf),
disk_stat_read(gp, ios[0]), disk_stat_read(gp, merges[0]),
(unsigned long long)disk_stat_read(gp, sectors[0]),
@@ -603,7 +599,7 @@
preempt_disable();
part_round_stats(hd);
preempt_enable();
- seq_printf(s, "%4d %4d %s %lu %lu %llu "
+ seq_printf(seqf, "%4d %4d %s %lu %lu %llu "
"%u %lu %lu %llu %u %u %u %u\n",
gp->major, n + gp->first_minor + 1,
disk_name(gp, n + 1, buf),
@@ -655,7 +651,7 @@
EXPORT_SYMBOL_GPL(genhd_media_change_notify);
#endif /* 0 */
-dev_t blk_lookup_devt(const char *name, int part)
+dev_t blk_lookup_devt(const char *name, int partno)
{
dev_t devt = MKDEV(0, 0);
struct class_dev_iter iter;
@@ -665,9 +661,9 @@
while ((dev = class_dev_iter_next(&iter))) {
struct gendisk *disk = dev_to_disk(dev);
- if (!strcmp(dev->bus_id, name) && part < disk->minors) {
+ if (!strcmp(dev->bus_id, name) && partno < disk->minors) {
devt = MKDEV(MAJOR(dev->devt),
- MINOR(dev->devt) + part);
+ MINOR(dev->devt) + partno);
break;
}
}
@@ -777,10 +773,10 @@
EXPORT_SYMBOL(bdev_read_only);
-int invalidate_partition(struct gendisk *disk, int index)
+int invalidate_partition(struct gendisk *disk, int partno)
{
int res = 0;
- struct block_device *bdev = bdget_disk(disk, index);
+ struct block_device *bdev = bdget_disk(disk, partno);
if (bdev) {
fsync_bdev(bdev);
res = __invalidate_device(bdev);