From 6f94a4c45a6f744383f9f695dde019998db3df55 Mon Sep 17 00:00:00 2001 From: Joe Thornber Date: Wed, 28 Mar 2012 18:41:23 +0100 Subject: [PATCH] dm thin: fix stacked bi_next usage Avoid using the bi_next field for the holder of a cell when deferring bios because a stacked device below might change it. Store the holder in a new field in struct cell instead. When a cell is created, the bio that triggered creation (the holder) was added to the same bio list as subsequent bios. In some cases we pass this holder bio directly to devices underneath. If those devices use the bi_next field there will be trouble... This also simplifies some code that had to work out which bio was the holder. Signed-off-by: Joe Thornber Cc: stable@kernel.org Signed-off-by: Mike Snitzer Signed-off-by: Alasdair G Kergon --- Reading git-format-patch failed