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block: restore original behavior of /proc/partition when there's no partition

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/proc/partitions didn't use to write out the header if there was no
partition.  However, recent commit 66c64afe changed the behavior.
This is nothing major but there's no reason to change user visible
behavior without a good rationale.  Restore the original behavior.

Note that 2.6.28 has clean up changes scheduled which will replace
this rather hacky implementation.

Signed-off-by: Tejun Heo <[email protected]>
Cc: Greg KH <[email protected]>
Cc: Kay Sievers <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Tejun Heo 2008-09-01 08:55:10 +02:00 • committed by Jens Axboe
commit ddef43a843
1 changed files with 12 additions and 1 deletions
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13
block/genhd.c
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@ -307,7 +307,7 @@ static void *part_start(struct seq_file *part, loff_t *pos)
loff_t k = *pos;
if (!k)
seq_puts(part, "major minor #blocks name\n\n");
part->private = (void *)1LU; /* tell show to print header */
mutex_lock(&block_class_lock);
dev = class_find_device(&block_class, NULL, &k, find_start);
@ -349,6 +349,17 @@ static int show_partition(struct seq_file *part, void *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)))