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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>
This commit is contained in:
Robert Richter 2008-12-18 19:44:20 +01:00
parent d45d23bed4
commit 9741b309bb
1 changed files with 19 additions and 20 deletions
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39
drivers/oprofile/buffer_sync.c
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@ -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; unsigned long cookie;
off_t offset; 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); cookie = lookup_dcookie(mm, s->eip, &offset);
if (cookie == INVALID_COOKIE) { 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) static void release_mm(struct mm_struct *mm)
{ {
if (!mm) if (!mm)