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Updated locking documentation for transaction_t 

We used LockDoc to derive locking rules for each member
of struct transaction_t.
Based on those results, we extended the existing documentation
by more members of struct transaction_t, and updated the existing
documentation.

Link: https://lore.kernel.org/r/10cfbef1-994c-c604-f8a6-b1042fcc622f@tu-dortmund.de
Signed-off-by: Alexander Lochmann <alexander.lochmann@tu-dortmund.de>
Signed-off-by: Horst Schirmeier <horst.schirmeier@tu-dortmund.de>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Alexander Lochmann 2020-10-15 15:24:52 +02:00 committed by Theodore Ts'o
parent 418baf2c28
commit 50a4952fd6
1 changed files with 3 additions and 2 deletions
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5
include/linux/jbd2.h
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@ -538,6 +538,7 @@ struct transaction_chp_stats_s {
* The transaction keeps track of all of the buffers modified by a
* running transaction, and all of the buffers committed but not yet
* flushed to home for finished transactions.
* (Locking Documentation improved by LockDoc)
*/
/*
@ -658,12 +659,12 @@ struct transaction_s
unsigned long t_start;
/*
* When commit was requested
* When commit was requested [j_state_lock]
*/
unsigned long t_requested;
/*
* Checkpointing stats [j_checkpoint_sem]
* Checkpointing stats [j_list_lock]
*/
struct transaction_chp_stats_s t_chp_stats;