[PATCH] lockdep: annotate on-stack completions
lockdep needs to have the waitqueue lock initialized for on-stack waitqueues
implicitly initialized by DECLARE_COMPLETION(). Annotate on-stack completions
accordingly.
Has no effect on non-lockdep kernels.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/x86_64/kernel/smpboot.c b/arch/x86_64/kernel/smpboot.c
index 9705a6a..b7c7059 100644
--- a/arch/x86_64/kernel/smpboot.c
+++ b/arch/x86_64/kernel/smpboot.c
@@ -775,6 +775,8 @@
};
DECLARE_WORK(work, do_fork_idle, &c_idle);
+ lockdep_set_class(&c_idle.done.wait.lock, &waitqueue_lock_key);
+
/* allocate memory for gdts of secondary cpus. Hotplug is considered */
if (!cpu_gdt_descr[cpu].address &&
!(cpu_gdt_descr[cpu].address = get_zeroed_page(GFP_KERNEL))) {
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c
index 5813d63..ab17c72 100644
--- a/block/ll_rw_blk.c
+++ b/block/ll_rw_blk.c
@@ -2516,7 +2516,7 @@
int blk_execute_rq(request_queue_t *q, struct gendisk *bd_disk,
struct request *rq, int at_head)
{
- DECLARE_COMPLETION(wait);
+ DECLARE_COMPLETION_ONSTACK(wait);
char sense[SCSI_SENSE_BUFFERSIZE];
int err = 0;
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index d6bf1ec..fb67952 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -1705,7 +1705,7 @@
{
unsigned long flags;
ide_hwgroup_t *hwgroup = HWGROUP(drive);
- DECLARE_COMPLETION(wait);
+ DECLARE_COMPLETION_ONSTACK(wait);
int where = ELEVATOR_INSERT_BACK, err;
int must_wait = (action == ide_wait || action == ide_head_wait);
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 82caba4..1c960ac 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -1001,7 +1001,7 @@
struct ata_queued_cmd *qc;
unsigned int tag, preempted_tag;
u32 preempted_sactive, preempted_qc_active;
- DECLARE_COMPLETION(wait);
+ DECLARE_COMPLETION_ONSTACK(wait);
unsigned long flags;
unsigned int err_mask;
int rc;
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index ed1cdf6..146298a 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -510,7 +510,7 @@
*/
int spi_sync(struct spi_device *spi, struct spi_message *message)
{
- DECLARE_COMPLETION(done);
+ DECLARE_COMPLETION_ONSTACK(done);
int status;
message->complete = spi_complete;
diff --git a/kernel/kmod.c b/kernel/kmod.c
index 1b7157a..1d32def 100644
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -233,7 +233,7 @@
int call_usermodehelper_keys(char *path, char **argv, char **envp,
struct key *session_keyring, int wait)
{
- DECLARE_COMPLETION(done);
+ DECLARE_COMPLETION_ONSTACK(done);
struct subprocess_info sub_info = {
.complete = &done,
.path = path,