diff options
Diffstat (limited to 'drivers/oprofile')
| -rw-r--r-- | drivers/oprofile/buffer_sync.c | 39 |
1 files changed, 19 insertions, 20 deletions
diff --git a/drivers/oprofile/buffer_sync.c b/drivers/oprofile/buffer_sync.c index d295d92..0abe29e 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) |