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md: remove MD_BUG()

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Most of the places that call this are doing so pointlessly.
A couple of the others a best replaced with WARN_ON().

Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
NeilBrown 2014-09-30 15:52:29 +10:00
parent 3adc28d85f
commit 403df47888
1 changed files with 12 additions and 46 deletions
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58
drivers/md/md.c
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@ -75,8 +75,6 @@ static struct workqueue_struct *md_misc_wq;
static int remove_and_add_spares(struct mddev *mddev,
struct md_rdev *this);
#define MD_BUG(x...) { printk("md: bug in file %s, line %d\n", __FILE__, __LINE__); md_print_devices(); }
/*
* Default number of read corrections we'll attempt on an rdev
* before ejecting it from the array. We divide the read error
@ -682,9 +680,6 @@ static inline sector_t calc_dev_sboffset(struct md_rdev *rdev)
static int alloc_disk_sb(struct md_rdev *rdev)
{
if (rdev->sb_page)
MD_BUG();
rdev->sb_page = alloc_page(GFP_KERNEL);
if (!rdev->sb_page) {
printk(KERN_ALERT "md: out of memory.\n");
@ -784,10 +779,7 @@ EXPORT_SYMBOL_GPL(sync_page_io);
static int read_disk_sb(struct md_rdev *rdev, int size)
{
char b[BDEVNAME_SIZE];
if (!rdev->sb_page) {
MD_BUG();
return -EINVAL;
}
if (rdev->sb_loaded)
return 0;
@ -2014,11 +2006,6 @@ static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev)
char *s;
int err;
if (rdev->mddev) {
MD_BUG();
return -EINVAL;
}
/* prevent duplicates */
if (find_rdev(mddev, rdev->bdev->bd_dev))
return -EEXIST;
@ -2100,10 +2087,7 @@ static void md_delayed_delete(struct work_struct *ws)
static void unbind_rdev_from_array(struct md_rdev *rdev)
{
char b[BDEVNAME_SIZE];
if (!rdev->mddev) {
MD_BUG();
return;
}
bd_unlink_disk_holder(rdev->bdev, rdev->mddev->gendisk);
list_del_rcu(&rdev->same_set);
printk(KERN_INFO "md: unbind<%s>\n", bdevname(rdev->bdev,b));
@ -2148,8 +2132,6 @@ static void unlock_rdev(struct md_rdev *rdev)
{
struct block_device *bdev = rdev->bdev;
rdev->bdev = NULL;
if (!bdev)
MD_BUG();
blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
}
@ -2158,10 +2140,9 @@ void md_autodetect_dev(dev_t dev);
static void export_rdev(struct md_rdev *rdev)
{
char b[BDEVNAME_SIZE];
printk(KERN_INFO "md: export_rdev(%s)\n",
bdevname(rdev->bdev,b));
if (rdev->mddev)
MD_BUG();
md_rdev_clear(rdev);
#ifndef MODULE
if (test_bit(AutoDetected, &rdev->flags))
@ -2427,15 +2408,12 @@ repeat:
mddev->can_decrease_events = nospares;
}
if (!mddev->events) {
/*
* oops, this 64-bit counter should never wrap.
* Either we are in around ~1 trillion A.C., assuming
* 1 reboot per second, or we have a bug:
*/
MD_BUG();
mddev->events --;
}
/*
* This 64-bit counter should never wrap.
* Either we are in around ~1 trillion A.C., assuming
* 1 reboot per second, or we have a bug...
*/
WARN_ON(mddev->events == 0);
rdev_for_each(rdev, mddev) {
if (rdev->badblocks.changed)
@ -6806,11 +6784,6 @@ void md_unregister_thread(struct md_thread **threadp)
void md_error(struct mddev *mddev, struct md_rdev *rdev)
{
if (!mddev) {
MD_BUG();
return;
}
if (!rdev || test_bit(Faulty, &rdev->flags))
return;
@ -6869,13 +6842,7 @@ static void status_resync(struct seq_file *seq, struct mddev *mddev)
else
max_sectors = mddev->dev_sectors;
/*
* Should not happen.
*/
if (!max_sectors) {
MD_BUG();
return;
}
WARN_ON(max_sectors == 0);
/* Pick 'scale' such that (resync>>scale)*1000 will fit
* in a sector_t, and (max_sectors>>scale) will fit in a
* u32, as those are the requirements for sector_div.
@ -8627,10 +8594,9 @@ static void autostart_arrays(int part)
if (IS_ERR(rdev))
continue;
if (test_bit(Faulty, &rdev->flags)) {
MD_BUG();
if (test_bit(Faulty, &rdev->flags))
continue;
}
set_bit(AutoDetected, &rdev->flags);
list_add(&rdev->same_set, &pending_raid_disks);
i_passed++;