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staging: lustre: simplify ptlrpc_deactivate_and_unlock_import 

The locking scheme used in ptlrpc_deactivate_and_unlock_import and
ptlrpc_deactivate_import generates the followings sparse errors:
drivers/staging/lustre/lustre/ptlrpc/import.c:209:9: warning: context
imbalance in 'ptlrpc_deactivate_and_unlock_import' - unexpected unlock
drivers/staging/lustre/lustre/ptlrpc/import.c:221:6: warning: context
imbalance in 'ptlrpc_deactivate_import' - wrong count at exit

As ptlrpc_deactivate_and_unlock_import is only used by
ptlrpc_deactivate_import as a helper function, this patch moves its code
into ptlrpc_deactivatre_import to fix the sparse warnings.

Signed-off-by: Maxime Lorrillere <maxime.lorrillere@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Maxime Lorrillere 2015-08-17 14:04:49 +02:00 committed by Greg Kroah-Hartman
parent 6ff33f3902
commit 441fda8461
1 changed files with 8 additions and 15 deletions
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23
drivers/staging/lustre/lustre/ptlrpc/import.c
View File

@ -200,28 +200,21 @@ int ptlrpc_set_import_discon(struct obd_import *imp, __u32 conn_cnt)
return rc;
}
/* Must be called with imp_lock held! */
static void ptlrpc_deactivate_and_unlock_import(struct obd_import *imp)
{
assert_spin_locked(&imp->imp_lock);
CDEBUG(D_HA, "setting import %s INVALID\n", obd2cli_tgt(imp->imp_obd));
imp->imp_invalid = 1;
imp->imp_generation++;
spin_unlock(&imp->imp_lock);
ptlrpc_abort_inflight(imp);
obd_import_event(imp->imp_obd, imp, IMP_EVENT_INACTIVE);
}
/*
* This acts as a barrier; all existing requests are rejected, and
* no new requests will be accepted until the import is valid again.
*/
void ptlrpc_deactivate_import(struct obd_import *imp)
{
CDEBUG(D_HA, "setting import %s INVALID\n", obd2cli_tgt(imp->imp_obd));
spin_lock(&imp->imp_lock);
ptlrpc_deactivate_and_unlock_import(imp);
imp->imp_invalid = 1;
imp->imp_generation++;
spin_unlock(&imp->imp_lock);
ptlrpc_abort_inflight(imp);
obd_import_event(imp->imp_obd, imp, IMP_EVENT_INACTIVE);
}
EXPORT_SYMBOL(ptlrpc_deactivate_import);