oprofile: simplify add_sample()

This patch removes add_us_sample() and simplifies add_sample(). Code
is much more readable now.

Signed-off-by: Robert Richter <robert.richter@amd.com>

diff --git a/drivers/oprofile/buffer_sync.c b/drivers/oprofile/buffer_sync.c
index d295d92..0abe29e 100644 (file)
--- a/drivers/oprofile/buffer_sync.c
+++ b/drivers/oprofile/buffer_sync.c
@@ -392,11 +392,29 @@ static void add_sample_entry(unsigned long offset, unsigned long event)
 }
 
 
-static int add_us_sample(struct mm_struct *mm, struct op_sample *s)
+/*
+ * Add a sample to the global event buffer. If possible the
+ * sample is converted into a persistent dentry/offset pair
+ * for later lookup from userspace. Return 0 on failure.
+ */
+static int
+add_sample(struct mm_struct *mm, struct op_sample *s, int in_kernel)
 {
        unsigned long cookie;
        off_t offset;
 
+       if (in_kernel) {
+               add_sample_entry(s->eip, s->event);
+               return 1;
+       }
+
+       /* add userspace sample */
+
+       if (!mm) {
+               atomic_inc(&oprofile_stats.sample_lost_no_mm);
+               return 0;
+       }
+
        cookie = lookup_dcookie(mm, s->eip, &offset);
 
        if (cookie == INVALID_COOKIE) {
@@ -415,25 +433,6 @@ static int add_us_sample(struct mm_struct *mm, struct op_sample *s)
 }
 
 
-/* Add a sample to the global event buffer. If possible the
- * sample is converted into a persistent dentry/offset pair
- * for later lookup from userspace.
- */
-static int
-add_sample(struct mm_struct *mm, struct op_sample *s, int in_kernel)
-{
-       if (in_kernel) {
-               add_sample_entry(s->eip, s->event);
-               return 1;
-       } else if (mm) {
-               return add_us_sample(mm, s);
-       } else {
-               atomic_inc(&oprofile_stats.sample_lost_no_mm);
-       }
-       return 0;
-}
-
-
 static void release_mm(struct mm_struct *mm)
 {
        if (!mm)