[SCSI] sg: remove sg_mutex

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With the exception of the detached field, sg_mutex no longer adds any
locking.  detached handling has been broken before and is still broken
and this patch does not seem to make things worse than they were to
begin with.

However, I have observed cases of tasks being blocked for >200s waiting
for sg_mutex.  So the removal clearly adds value for very little cost.

Signed-off-by: Joern Engel <joern@logfs.org>
Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

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Jörn Engel 2012-04-12 17:35:05 -04:00 • committed by James Bottomley

parent 035d12e658

commit 37b9d1e001

1 changed files with 2 additions and 17 deletions

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19

drivers/scsi/sg.c

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