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Minor performance improvement

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git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@630 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Vladislav Bolkhovitin
2009-01-04 17:53:57 +00:00
parent c89d549bbe
commit 606a02d963
1 changed files with 9 additions and 9 deletions
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scst/src/dev_handlers/scst_user.c
+9 -9
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@@ -1489,7 +1489,7 @@ static int dev_user_reply_cmd(struct file *file, void __user *arg)
mutex_lock(&dev_priv_mutex);
dev = (struct scst_user_dev *)file->private_data;
res = dev_user_check_reg(dev);
if (res != 0) {
if (unlikely(res != 0)) {
mutex_unlock(&dev_priv_mutex);
goto out;
}
@@ -1497,7 +1497,7 @@ static int dev_user_reply_cmd(struct file *file, void __user *arg)
mutex_unlock(&dev_priv_mutex);
res = copy_from_user(&reply, arg, sizeof(reply));
if (res < 0)
if (unlikely(res < 0))
goto out_up;
TRACE_MGMT_DBG("Reply for dev %s", dev->name);
@@ -1505,7 +1505,7 @@ static int dev_user_reply_cmd(struct file *file, void __user *arg)
TRACE_BUFFER("Reply", &reply, sizeof(reply));
res = dev_user_process_reply(dev, &reply);
if (res < 0)
if (unlikely(res < 0))
goto out_up;
out_up:
@@ -1675,7 +1675,7 @@ static int dev_user_reply_get_cmd(struct file *file, void __user *arg)
mutex_lock(&dev_priv_mutex);
dev = (struct scst_user_dev *)file->private_data;
res = dev_user_check_reg(dev);
if (res != 0) {
if (unlikely(res != 0)) {
mutex_unlock(&dev_priv_mutex);
goto out;
}
@@ -1686,14 +1686,14 @@ static int dev_user_reply_get_cmd(struct file *file, void __user *arg)
res = copy_from_user(&ureply, (uint64_t __user *)
&((struct scst_user_get_cmd *)arg)->preply,
sizeof(ureply));
if (res < 0)
if (unlikely(res < 0))
goto out_up;
TRACE_DBG("ureply %lld (dev %s)", (long long unsigned int)ureply,
dev->name);
cmd = kmem_cache_alloc(user_get_cmd_cachep, GFP_KERNEL);
if (cmd == NULL) {
if (unlikely(cmd == NULL)) {
res = -ENOMEM;
goto out_up;
}
@@ -1702,13 +1702,13 @@ static int dev_user_reply_get_cmd(struct file *file, void __user *arg)
unsigned long u = (unsigned long)ureply;
reply = (struct scst_user_reply_cmd *)cmd;
res = copy_from_user(reply, (void __user *)u, sizeof(*reply));
if (res < 0)
if (unlikely(res < 0))
goto out_free;
TRACE_BUFFER("Reply", reply, sizeof(*reply));
res = dev_user_process_reply(dev, reply);
if (res < 0)
if (unlikely(res < 0))
goto out_free;
}
@@ -1811,7 +1811,7 @@ static unsigned int dev_user_poll(struct file *file, poll_table *wait)
mutex_lock(&dev_priv_mutex);
dev = (struct scst_user_dev *)file->private_data;
res = dev_user_check_reg(dev);
if (res != 0) {
if (unlikely(res != 0)) {
mutex_unlock(&dev_priv_mutex);
goto out;
}