cris: use simple_read_from_buffer()

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 7 insertions, 10 deletions

diff --git a/arch/cris/kernel/profile.c b/arch/cris/kernel/profile.c
index 44f7b4f79476..9aa571169bcc 100644
--- a/arch/cris/kernel/profile.c
+++ b/arch/cris/kernel/profile.c
@@ -35,19 +35,16 @@ read_cris_profile(struct file *file, char __user *buf,
                   size_t count, loff_t *ppos)
 {
         unsigned long p = *ppos;
+        ssize_t ret;
 
-        if (p > SAMPLE_BUFFER_SIZE)
-                return 0;
+        ret = simple_read_from_buffer(buf, count, ppos, sample_buffer,
+                                                SAMPLE_BUFFER_SIZE);
+        if (ret < 0)
+                return ret;
 
-        if (p + count > SAMPLE_BUFFER_SIZE)
-                count = SAMPLE_BUFFER_SIZE - p;
-        if (copy_to_user(buf, sample_buffer + p,count))
-                return -EFAULT;
+        memset(sample_buffer + p, 0, ret);
 
-        memset(sample_buffer + p, 0, count);
-        *ppos += count;
-
-        return count;
+        return ret;
 }
 
 static ssize_t