1 files changed, 13 insertions, 19 deletions

diff --git a/block/blktrace.c b/block/blktrace.c
index 2b4ef2b89b8d..135593c8e45b 100644
--- a/block/blktrace.c
+++ b/block/blktrace.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2006 Jens Axboe <axboe@suse.de>
+ * Copyright (C) 2006 Jens Axboe <axboe@kernel.dk>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -69,7 +69,7 @@ static u32 ddir_act[2] __read_mostly = { BLK_TC_ACT(BLK_TC_READ), BLK_TC_ACT(BLK
 /*
  * Bio action bits of interest
  */
-static u32 bio_act[5] __read_mostly = { 0, BLK_TC_ACT(BLK_TC_BARRIER), BLK_TC_ACT(BLK_TC_SYNC), 0, BLK_TC_ACT(BLK_TC_AHEAD) };
+static u32 bio_act[9] __read_mostly = { 0, BLK_TC_ACT(BLK_TC_BARRIER), BLK_TC_ACT(BLK_TC_SYNC), 0, BLK_TC_ACT(BLK_TC_AHEAD), 0, 0, 0, BLK_TC_ACT(BLK_TC_META) };
 
 /*
  * More could be added as needed, taking care to increment the decrementer
@@ -81,6 +81,8 @@ static u32 bio_act[5] __read_mostly = { 0, BLK_TC_ACT(BLK_TC_BARRIER), BLK_TC_AC
         (((rw) & (1 << BIO_RW_SYNC)) >> (BIO_RW_SYNC - 1))
 #define trace_ahead_bit(rw)     \
         (((rw) & (1 << BIO_RW_AHEAD)) << (2 - BIO_RW_AHEAD))
+#define trace_meta_bit(rw)      \
+        (((rw) & (1 << BIO_RW_META)) >> (BIO_RW_META - 3))
 
 /*
  * The worker for the various blk_add_trace*() types. Fills out a
@@ -103,6 +105,7 @@ void __blk_add_trace(struct blk_trace *bt, sector_t sector, int bytes,
         what |= bio_act[trace_barrier_bit(rw)];
         what |= bio_act[trace_sync_bit(rw)];
         what |= bio_act[trace_ahead_bit(rw)];
+        what |= bio_act[trace_meta_bit(rw)];
 
         pid = tsk->pid;
         if (unlikely(act_log_check(bt, what, sector, pid)))
@@ -450,8 +453,10 @@ int blk_trace_ioctl(struct block_device *bdev, unsigned cmd, char __user *arg)
  **/
 void blk_trace_shutdown(request_queue_t *q)
 {
-        blk_trace_startstop(q, 0);
-        blk_trace_remove(q);
+        if (q->blk_trace) {
+                blk_trace_startstop(q, 0);
+                blk_trace_remove(q);
+        }
 }
 
 /*
@@ -471,6 +476,9 @@ static void blk_check_time(unsigned long long *t)
         *t -= (a + b) / 2;
 }
 
+/*
+ * calibrate our inter-CPU timings
+ */
 static void blk_trace_check_cpu_time(void *data)
 {
         unsigned long long *t;
@@ -488,20 +496,6 @@ static void blk_trace_check_cpu_time(void *data)
         put_cpu();
 }
 
-/*
- * Call blk_trace_check_cpu_time() on each CPU to calibrate our inter-CPU
- * timings
- */
-static void blk_trace_calibrate_offsets(void)
-{
-        unsigned long flags;
-
-        smp_call_function(blk_trace_check_cpu_time, NULL, 1, 1);
-        local_irq_save(flags);
-        blk_trace_check_cpu_time(NULL);
-        local_irq_restore(flags);
-}
-
 static void blk_trace_set_ht_offsets(void)
 {
 #if defined(CONFIG_SCHED_SMT)
@@ -530,7 +524,7 @@ static void blk_trace_set_ht_offsets(void)
 static __init int blk_trace_init(void)
 {
         mutex_init(&blk_tree_mutex);
-        blk_trace_calibrate_offsets();
+        on_each_cpu(blk_trace_check_cpu_time, NULL, 1, 1);
         blk_trace_set_ht_offsets();
 
         return 0;