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| author | H. Peter Anvin <hpa@linux.intel.com> | 2010-10-11 17:05:11 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2010-10-11 17:05:11 -0700 |
| commit | 8e4029ee3517084ae00fbfbcb51cc365d8857061 (patch) | |
| tree | 3d86578dc6160781a0c2fdad461e5195e73bfafc /block | |
| parent | cd79481d27b9f90aad80c9b972292c42c25bbf8e (diff) | |
| parent | 73cf624d029d776a33d0a80c695485b3f9b36231 (diff) | |
| download | linux-3.10-8e4029ee3517084ae00fbfbcb51cc365d8857061.tar.gz linux-3.10-8e4029ee3517084ae00fbfbcb51cc365d8857061.tar.bz2 linux-3.10-8e4029ee3517084ae00fbfbcb51cc365d8857061.zip | |
Merge branch 'x86/urgent' into core/memblock
Reason for merge:
Forward-port urgent change to arch/x86/mm/srat_64.c to the memblock tree.
Resolved Conflicts:
arch/x86/mm/srat_64.c
Originally-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/elevator.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/block/elevator.c b/block/elevator.c index 205b09a5bd9..4e11559aa2b 100644 --- a/block/elevator.c +++ b/block/elevator.c @@ -938,6 +938,7 @@ int elv_register_queue(struct request_queue *q) } } kobject_uevent(&e->kobj, KOBJ_ADD); + e->registered = 1; } return error; } @@ -947,6 +948,7 @@ static void __elv_unregister_queue(struct elevator_queue *e) { kobject_uevent(&e->kobj, KOBJ_REMOVE); kobject_del(&e->kobj); + e->registered = 0; } void elv_unregister_queue(struct request_queue *q) @@ -1042,11 +1044,13 @@ static int elevator_switch(struct request_queue *q, struct elevator_type *new_e) spin_unlock_irq(q->queue_lock); - __elv_unregister_queue(old_elevator); + if (old_elevator->registered) { + __elv_unregister_queue(old_elevator); - err = elv_register_queue(q); - if (err) - goto fail_register; + err = elv_register_queue(q); + if (err) + goto fail_register; + } /* * finally exit old elevator and turn off BYPASS. |