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ubifs: Add comment on c->commit_sem

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Every single time I come across that code, I get confused
because it looks like a possible dead lock.
Help myself by adding a comment.

Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Richard Weinberger 2018-08-13 15:14:45 +02:00
parent 7e5471ce6d
commit 49d2e05fb4
1 changed files with 1 additions and 0 deletions
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fs/ubifs/journal.c
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@ -317,6 +317,7 @@ again:
down_read(&c->commit_sem);
err = reserve_space(c, jhead, len);
if (!err)
/* c->commit_sem will get released via finish_reservation(). */
return 0;
up_read(&c->commit_sem);