[PATCH 02/10] block: make variable and argument names more consistent

From: Tejun Heo
Date: Mon Jul 14 2008 - 03:15:49 EST

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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 instead.

Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
---
block/genhd.c | 50 ++++++++++++++++++++++++------------------------
block/ioctl.c | 14 ++++++------
fs/block_dev.c | 8 +++---
fs/partitions/check.c | 32 +++++++++++++++---------------
include/linux/genhd.h | 12 +++++-----
5 files changed, 58 insertions(+), 58 deletions(-)

diff --git a/block/genhd.c b/block/genhd.c
index 432c358..94c4203 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -43,14 +43,14 @@ static inline int major_to_index(int major)
}

#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 @@ void blk_unregister_region(dev_t devt, unsigned long range)

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;

@@ -214,9 +214,9 @@ void unlink_gendisk(struct gendisk *disk)
* This function gets the structure containing partitioning
* information for the given device @dev.
*/
-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;
@@ -280,7 +280,7 @@ void __init printk_all_partitions(void)

#ifdef CONFIG_PROC_FS
/* iterator */
-static void *part_start(struct seq_file *part, loff_t *pos)
+static void *part_start(struct seq_file *seqf, loff_t *pos)
{
loff_t k = *pos;
struct device *dev;
@@ -295,7 +295,7 @@ static void *part_start(struct seq_file *part, loff_t *pos)
return NULL;
}

-static void *part_next(struct seq_file *part, void *v, loff_t *pos)
+static void *part_next(struct seq_file *seqf, void *v, loff_t *pos)
{
struct gendisk *gp = v;
struct device *dev;
@@ -309,19 +309,19 @@ static void *part_next(struct seq_file *part, void *v, loff_t *pos)
return NULL;
}

-static void part_stop(struct seq_file *part, void *v)
+static void part_stop(struct seq_file *seqf, void *v)
{
up(&block_class.sem);
}

-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];

if (&sgp->dev.node == block_class.devices.next)
- seq_puts(part, "major minor #blocks name\n\n");
+ seq_puts(seqf, "major minor #blocks name\n\n");

/* Don't show non-partitionable removeable devices or empty devices */
if (!get_capacity(sgp) ||
@@ -331,7 +331,7 @@ static int show_partition(struct seq_file *part, void *v)
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));
@@ -340,7 +340,7 @@ static int show_partition(struct seq_file *part, void *v)
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));
@@ -358,7 +358,7 @@ const struct seq_operations partitions_op = {
#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 */
@@ -528,7 +528,7 @@ static struct device_type disk_type = {
* extra fields.
*/

-static void *diskstats_start(struct seq_file *part, loff_t *pos)
+static void *diskstats_start(struct seq_file *seqf, loff_t *pos)
{
loff_t k = *pos;
struct device *dev;
@@ -543,7 +543,7 @@ static void *diskstats_start(struct seq_file *part, loff_t *pos)
return NULL;
}

-static void *diskstats_next(struct seq_file *part, void *v, loff_t *pos)
+static void *diskstats_next(struct seq_file *seqf, void *v, loff_t *pos)
{
struct gendisk *gp = v;
struct device *dev;
@@ -558,12 +558,12 @@ static void *diskstats_next(struct seq_file *part, void *v, loff_t *pos)
return NULL;
}

-static void diskstats_stop(struct seq_file *part, void *v)
+static void diskstats_stop(struct seq_file *seqf, void *v)
{
up(&block_class.sem);
}

-static int diskstats_show(struct seq_file *s, void *v)
+static int diskstats_show(struct seq_file *seqf, void *v)
{
struct gendisk *gp = v;
char buf[BDEVNAME_SIZE];
@@ -571,7 +571,7 @@ static int diskstats_show(struct seq_file *s, void *v)

/*
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");
@@ -580,7 +580,7 @@ static int diskstats_show(struct seq_file *s, void *v)
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]),
@@ -602,7 +602,7 @@ static int diskstats_show(struct seq_file *s, void *v)
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),
@@ -653,7 +653,7 @@ void genhd_media_change_notify(struct gendisk *disk)
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)
{
struct device *dev;
dev_t devt = MKDEV(0, 0);
@@ -665,9 +665,9 @@ dev_t blk_lookup_devt(const char *name, int part)
if (strcmp(dev->bus_id, name) == 0) {
struct gendisk *disk = dev_to_disk(dev);

- if (part < disk->minors)
+ if (partno < disk->minors)
devt = MKDEV(MAJOR(dev->devt),
- MINOR(dev->devt) + part);
+ MINOR(dev->devt) + partno);
break;
}
}
@@ -778,10 +778,10 @@ int bdev_read_only(struct block_device *bdev)

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);
diff --git a/block/ioctl.c b/block/ioctl.c
index ecbdd74..54a468d 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -15,7 +15,7 @@ static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user
struct blkpg_ioctl_arg a;
struct blkpg_partition p;
long long start, length;
- int part;
+ int partno;
int i, rc;

if (!capable(CAP_SYS_ADMIN))
@@ -27,8 +27,8 @@ static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user
disk = bdev->bd_disk;
if (bdev != bdev->bd_contains)
return -EINVAL;
- part = p.pno;
- if (part <= 0 || part >= disk->minors)
+ partno = p.pno;
+ if (partno <= 0 || partno >= disk->minors)
return -EINVAL;
switch (a.op) {
case BLKPG_ADD_PARTITION:
@@ -59,16 +59,16 @@ static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user
}

/* all seems OK */
- rc = add_partition(disk, part, start, length,
+ rc = add_partition(disk, partno, start, length,
ADDPART_FLAG_NONE);

mutex_unlock(&bdev->bd_mutex);
return rc;

case BLKPG_DEL_PARTITION:
- if (!disk->part[part-1])
+ if (!disk->part[partno - 1])
return -ENXIO;
- bdevp = bdget_disk(disk, part);
+ bdevp = bdget_disk(disk, partno);
if (!bdevp)
return -ENOMEM;
mutex_lock(&bdevp->bd_mutex);
@@ -82,7 +82,7 @@ static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user
invalidate_bdev(bdevp);

mutex_lock_nested(&bdev->bd_mutex, 1);
- delete_partition(disk, part);
+ delete_partition(disk, partno);
mutex_unlock(&bdev->bd_mutex);
mutex_unlock(&bdevp->bd_mutex);
bdput(bdevp);
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 10d8a0a..6451120 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -930,7 +930,7 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part)
struct module *owner = NULL;
struct gendisk *disk;
int ret;
- int part;
+ int partno;
int perm = 0;

if (file->f_mode & FMODE_READ)
@@ -947,7 +947,7 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part)
ret = -ENXIO;
file->f_mapping = bdev->bd_inode->i_mapping;
lock_kernel();
- disk = get_gendisk(bdev->bd_dev, &part);
+ disk = get_gendisk(bdev->bd_dev, &partno);
if (!disk) {
unlock_kernel();
bdput(bdev);
@@ -959,7 +959,7 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part)
if (!bdev->bd_openers) {
bdev->bd_disk = disk;
bdev->bd_contains = bdev;
- if (!part) {
+ if (!partno) {
struct backing_dev_info *bdi;
if (disk->fops->open) {
ret = disk->fops->open(bdev->bd_inode, file);
@@ -987,7 +987,7 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part)
if (ret)
goto out_first;
bdev->bd_contains = whole;
- p = disk->part[part - 1];
+ p = disk->part[partno - 1];
bdev->bd_inode->i_data.backing_dev_info =
whole->bd_inode->i_data.backing_dev_info;
if (!(disk->flags & GENHD_FL_UP) || !p || !p->nr_sects) {
diff --git a/fs/partitions/check.c b/fs/partitions/check.c
index b75ca08..fa27fdb 100644
--- a/fs/partitions/check.c
+++ b/fs/partitions/check.c
@@ -120,22 +120,22 @@ static int (*check_part[])(struct parsed_partitions *, struct block_device *) =
* a pointer to that same buffer (for convenience).
*/

-char *disk_name(struct gendisk *hd, int part, char *buf)
+char *disk_name(struct gendisk *hd, int partno, char *buf)
{
- if (!part)
+ if (!partno)
snprintf(buf, BDEVNAME_SIZE, "%s", hd->disk_name);
else if (isdigit(hd->disk_name[strlen(hd->disk_name)-1]))
- snprintf(buf, BDEVNAME_SIZE, "%sp%d", hd->disk_name, part);
+ snprintf(buf, BDEVNAME_SIZE, "%sp%d", hd->disk_name, partno);
else
- snprintf(buf, BDEVNAME_SIZE, "%s%d", hd->disk_name, part);
+ snprintf(buf, BDEVNAME_SIZE, "%s%d", hd->disk_name, partno);

return buf;
}

const char *bdevname(struct block_device *bdev, char *buf)
{
- int part = MINOR(bdev->bd_dev) - bdev->bd_disk->first_minor;
- return disk_name(bdev->bd_disk, part, buf);
+ int partno = MINOR(bdev->bd_dev) - bdev->bd_disk->first_minor;
+ return disk_name(bdev->bd_disk, partno, buf);
}

EXPORT_SYMBOL(bdevname);
@@ -319,13 +319,13 @@ static inline void disk_sysfs_add_subdirs(struct gendisk *disk)
kobject_put(k);
}

-void delete_partition(struct gendisk *disk, int part)
+void delete_partition(struct gendisk *disk, int partno)
{
- struct hd_struct *p = disk->part[part-1];
+ struct hd_struct *p = disk->part[partno-1];

if (!p)
return;
- disk->part[part-1] = NULL;
+ disk->part[partno-1] = NULL;
p->start_sect = 0;
p->nr_sects = 0;
part_stat_set_all(p, 0);
@@ -342,13 +342,13 @@ static ssize_t whole_disk_show(struct device *dev,
static DEVICE_ATTR(whole_disk, S_IRUSR | S_IRGRP | S_IROTH,
whole_disk_show, NULL);

-int add_partition(struct gendisk *disk, int part,
+int add_partition(struct gendisk *disk, int partno,
sector_t start, sector_t len, int flags)
{
struct hd_struct *p = NULL;
int err;

- if (disk->part[part - 1]) {
+ if (disk->part[partno - 1]) {
err = -EBUSY;
goto fail;
}
@@ -362,22 +362,22 @@ int add_partition(struct gendisk *disk, int part,

p->start_sect = start;
p->nr_sects = len;
- p->partno = part;
+ p->partno = partno;
p->policy = disk->policy;

if (isdigit(disk->dev.bus_id[strlen(disk->dev.bus_id)-1]))
snprintf(p->dev.bus_id, BUS_ID_SIZE,
- "%sp%d", disk->dev.bus_id, part);
+ "%sp%d", disk->dev.bus_id, partno);
else
snprintf(p->dev.bus_id, BUS_ID_SIZE,
- "%s%d", disk->dev.bus_id, part);
+ "%s%d", disk->dev.bus_id, partno);

device_initialize(&p->dev);
- p->dev.devt = MKDEV(disk->major, disk->first_minor + part);
+ p->dev.devt = MKDEV(disk->major, disk->first_minor + partno);
p->dev.class = &block_class;
p->dev.type = &part_type;
p->dev.parent = &disk->dev;
- disk->part[part-1] = p;
+ disk->part[partno-1] = p;

/* delay uevent until 'holders' subdir is created */
p->dev.uevent_suppress = 1;
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 68d50a2..f8a54bb 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -363,7 +363,7 @@ extern int get_blkdev_list(char *, int);
extern void add_disk(struct gendisk *disk);
extern void del_gendisk(struct gendisk *gp);
extern void unlink_gendisk(struct gendisk *gp);
-extern struct gendisk *get_gendisk(dev_t dev, int *part);
+extern struct gendisk *get_gendisk(dev_t dev, int *partno);

extern void set_device_ro(struct block_device *bdev, int flag);
extern void set_disk_ro(struct gendisk *disk, int flag);
@@ -532,8 +532,8 @@ struct unixware_disklabel {
#define ADDPART_FLAG_RAID 1
#define ADDPART_FLAG_WHOLEDISK 2

-extern dev_t blk_lookup_devt(const char *name, int part);
-extern char *disk_name (struct gendisk *hd, int part, char *buf);
+extern dev_t blk_lookup_devt(const char *name, int partno);
+extern char *disk_name (struct gendisk *hd, int partno, char *buf);

extern int rescan_partitions(struct gendisk *disk, struct block_device *bdev);
extern int add_partition(struct gendisk *, int, sector_t, sector_t, int);
@@ -551,16 +551,16 @@ extern void blk_register_region(dev_t devt, unsigned long range,
void *data);
extern void blk_unregister_region(dev_t devt, unsigned long range);

-static inline struct block_device *bdget_disk(struct gendisk *disk, int index)
+static inline struct block_device *bdget_disk(struct gendisk *disk, int partno)
{
- return bdget(MKDEV(disk->major, disk->first_minor) + index);
+ return bdget(MKDEV(disk->major, disk->first_minor) + partno);
}

#else /* CONFIG_BLOCK */

static inline void printk_all_partitions(void) { }

-static inline dev_t blk_lookup_devt(const char *name, int part)
+static inline dev_t blk_lookup_devt(const char *name, int partno)
{
dev_t devt = MKDEV(0, 0);
return devt;
--
1.5.4.5

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Next message: Yinghai Lu: "Re: [PATCH] x86_64: reserve crashkernel bootmem before reserve dma32 bootmem"
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