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authorJens Axboe <jens.axboe@oracle.com>2006-12-04 09:27:41 +0100
committerJens Axboe <jens.axboe@oracle.com>2006-12-04 09:27:41 +0100
commitd3d9d2a5ea9770db07aeb13a07f999aa48e8f865 (patch)
treecd8ccab813677737bf7b65a941566b56b39fb008 /block
parentd916faace3efc0bf19fe9a615a1ab8fa1a24cd93 (diff)
downloadlinux-linaro-stable-d3d9d2a5ea9770db07aeb13a07f999aa48e8f865.tar.gz
[PATCH] blktrace: uninline trace_note()
It's too large to inline. Additionally clean it up, by fast pathing the likely path. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block')
-rw-r--r--block/blktrace.c30
1 files changed, 15 insertions, 15 deletions
diff --git a/block/blktrace.c b/block/blktrace.c
index 562ca7cbf858..17bbdb811aa7 100644
--- a/block/blktrace.c
+++ b/block/blktrace.c
@@ -31,25 +31,25 @@ static unsigned int blktrace_seq __read_mostly = 1;
/*
* Send out a notify message.
*/
-static inline unsigned int trace_note(struct blk_trace *bt,
- pid_t pid, int action,
- const void *data, size_t len)
+static unsigned int trace_note(struct blk_trace *bt, pid_t pid, int action,
+ const void *data, size_t len)
{
struct blk_io_trace *t;
- int cpu = smp_processor_id();
t = relay_reserve(bt->rchan, sizeof(*t) + len);
- if (t == NULL)
- return 0;
-
- t->magic = BLK_IO_TRACE_MAGIC | BLK_IO_TRACE_VERSION;
- t->time = sched_clock() - per_cpu(blk_trace_cpu_offset, cpu);
- t->device = bt->dev;
- t->action = action;
- t->pid = pid;
- t->cpu = cpu;
- t->pdu_len = len;
- memcpy((void *) t + sizeof(*t), data, len);
+ if (t) {
+ const int cpu = smp_processor_id();
+
+ t->magic = BLK_IO_TRACE_MAGIC | BLK_IO_TRACE_VERSION;
+ t->time = sched_clock() - per_cpu(blk_trace_cpu_offset, cpu);
+ t->device = bt->dev;
+ t->action = action;
+ t->pid = pid;
+ t->cpu = cpu;
+ t->pdu_len = len;
+ memcpy((void *) t + sizeof(*t), data, len);
+ }
+
return blktrace_seq;
}