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block: remove __bdevname 

There is no good reason for __bdevname to exist.  Just open code
printing the string in the callers.  For three of them the format
string can be trivially merged into existing printk statements,
and in init/do_mounts.c we can at least do the scnprintf once at
the start of the function, and unconditional of CONFIG_BLOCK to
make the output for tiny configfs a little more helpful.

Acked-by: Theodore Ts'o <tytso@mit.edu> # for ext4
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2020-03-24 08:25:11 +01:00 committed by Jens Axboe
parent d2332c5c04
commit ea3edd4dc2
6 changed files with 9 additions and 33 deletions
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14
block/partition-generic.c
View File

@ -57,20 +57,6 @@ const char *bio_devname(struct bio *bio, char *buf)
}
EXPORT_SYMBOL(bio_devname);
/*
* There's very little reason to use this, you should really
* have a struct block_device just about everywhere and use
* bdevname() instead.
*/
const char *__bdevname(dev_t dev, char *buffer)
{
scnprintf(buffer, BDEVNAME_SIZE, "unknown-block(%u,%u)",
MAJOR(dev), MINOR(dev));
return buffer;
}
EXPORT_SYMBOL(__bdevname);
static ssize_t part_partition_show(struct device *dev,
struct device_attribute *attr, char *buf)
{

4
drivers/md/md.c
View File

@ -2491,12 +2491,12 @@ static int lock_rdev(struct md_rdev *rdev, dev_t dev, int shared)
{
int err = 0;
struct block_device *bdev;
char b[BDEVNAME_SIZE];
bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
shared ? (struct md_rdev *)lock_rdev : rdev);
if (IS_ERR(bdev)) {
pr_warn("md: could not open %s.\n", __bdevname(dev, b));
pr_warn("md: could not open device unknown-block(%u,%u).\n",
MAJOR(dev), MINOR(dev));
return PTR_ERR(bdev);
}
rdev->bdev = bdev;

6
fs/ext4/super.c
View File

@ -927,7 +927,6 @@ void ext4_update_dynamic_rev(struct super_block *sb)
static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb)
{
struct block_device *bdev;
char b[BDEVNAME_SIZE];
bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb);
if (IS_ERR(bdev))
@ -935,8 +934,9 @@ static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb)
return bdev;
fail:
ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld",
__bdevname(dev, b), PTR_ERR(bdev));
ext4_msg(sb, KERN_ERR,
"failed to open journal device unknown-block(%u,%u) %ld",
MAJOR(dev), MINOR(dev), PTR_ERR(bdev));
return NULL;
}

5
fs/reiserfs/journal.c
View File

@ -2599,7 +2599,6 @@ static int journal_init_dev(struct super_block *super,
int result;
dev_t jdev;
fmode_t blkdev_mode = FMODE_READ | FMODE_WRITE | FMODE_EXCL;
char b[BDEVNAME_SIZE];
result = 0;
@ -2621,8 +2620,8 @@ static int journal_init_dev(struct super_block *super,
result = PTR_ERR(journal->j_dev_bd);
journal->j_dev_bd = NULL;
reiserfs_warning(super, "sh-458",
"cannot init journal device '%s': %i",
__bdevname(jdev, b), result);
"cannot init journal device unknown-block(%u,%u): %i",
MAJOR(jdev), MINOR(jdev), result);
return result;
} else if (jdev != super->s_dev)
set_blocksize(journal->j_dev_bd, super->s_blocksize);

1
include/linux/fs.h
View File

@ -2699,7 +2699,6 @@ static inline void unregister_chrdev(unsigned int major, const char *name)
#ifdef CONFIG_BLOCK
#define BLKDEV_MAJOR_MAX 512
extern const char *__bdevname(dev_t, char *buffer);
extern const char *bdevname(struct block_device *bdev, char *buffer);
extern struct block_device *lookup_bdev(const char *);
extern void blkdev_show(struct seq_file *,off_t);

12
init/do_mounts.c
View File

@ -429,12 +429,10 @@ void __init mount_block_root(char *name, int flags)
struct page *page = alloc_page(GFP_KERNEL);
char *fs_names = page_address(page);
char *p;
#ifdef CONFIG_BLOCK
char b[BDEVNAME_SIZE];
#else
const char *b = name;
#endif
scnprintf(b, BDEVNAME_SIZE, "unknown-block(%u,%u)",
MAJOR(ROOT_DEV), MINOR(ROOT_DEV));
get_fs_names(fs_names);
retry:
for (p = fs_names; *p; p += strlen(p)+1) {
@ -451,9 +449,6 @@ retry:
* and bad superblock on root device.
* and give them a list of the available devices
*/
#ifdef CONFIG_BLOCK
__bdevname(ROOT_DEV, b);
#endif
printk("VFS: Cannot open root device \"%s\" or %s: error %d\n",
root_device_name, b, err);
printk("Please append a correct \"root=\" boot option; here are the available partitions:\n");
@ -476,9 +471,6 @@ retry:
for (p = fs_names; *p; p += strlen(p)+1)
printk(" %s", p);
printk("\n");
#ifdef CONFIG_BLOCK
__bdevname(ROOT_DEV, b);
#endif
panic("VFS: Unable to mount root fs on %s", b);
out:
put_page(page);