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UBI: add some more comments

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Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This commit is contained in:
Artem Bityutskiy 2007-12-17 13:21:07 +02:00
parent cae0a77125
commit c63a491d37
1 changed files with 7 additions and 1 deletions
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8
drivers/mtd/ubi/eba.c
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@ -797,7 +797,7 @@ write_error:
/* /*
* ubi_eba_atomic_leb_change - change logical eraseblock atomically. * ubi_eba_atomic_leb_change - change logical eraseblock atomically.
* @ubi: UBI device description object * @ubi: UBI device description object
* @vol: volume escription object * @vol: volume description object
* @lnum: logical eraseblock number * @lnum: logical eraseblock number
* @buf: data to write * @buf: data to write
* @len: how many bytes to write * @len: how many bytes to write
@ -955,6 +955,12 @@ int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to,
/* /*
* We may race with volume deletion/re-size, so we have to hold * We may race with volume deletion/re-size, so we have to hold
* @ubi->volumes_lock. * @ubi->volumes_lock.
*
* Note, it is not a problem if we race with volume deletion or re-size
* here. If the volume is deleted or re-sized while we are moving an
* eraseblock which belongs to this volume, we'll end up with finding
* out that this LEB was unmapped at the end (see WL), and drop this
* PEB.
*/ */
spin_lock(&ubi->volumes_lock); spin_lock(&ubi->volumes_lock);
vol = ubi->volumes[idx]; vol = ubi->volumes[idx];