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staging: lustre: ptlrpc: list_for_each improvements.

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1/ use list_for_each_entry_safe() instead of
   list_for_each_safe() and similar.

2/ use list_first_entry() and list_last_entry() where appropriate.

3/ When removing everything from a list, use
     while ((x = list_first_entry_or_null()) {
   as it makes the intent clear

4/ No need to take a spinlock in a structure that is about
   to be freed - we must have exclusive access at this stage.

Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
NeilBrown 2018-02-20 13:23:38 +11:00 • committed by Greg Kroah-Hartman
commit ef8e5dbbb0
6 changed files with 59 additions and 126 deletions
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