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authorRobert Richter <robert.richter@amd.com>2008-12-18 19:44:20 +0100
committerRobert Richter <robert.richter@amd.com>2008-12-29 18:53:26 +0100
commit9741b309bb4493eedd3cdb5c97b566338a0da2cc (patch)
tree464db2c3b97daf69251a94d3589e3e6185910d80 /drivers/oprofile
parentd45d23bed4bf7b25b7dcc336552a251db1aa1279 (diff)
downloadlinux-9741b309bb4493eedd3cdb5c97b566338a0da2cc.tar.bz2
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>
Diffstat (limited to 'drivers/oprofile')
-rw-r--r--drivers/oprofile/buffer_sync.c39
1 files changed, 19 insertions, 20 deletions
diff --git a/drivers/oprofile/buffer_sync.c b/drivers/oprofile/buffer_sync.c
index d295d92b57f0..0abe29e7e4c7 100644
--- 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)