diff options
| author | Steve French <sfrench@us.ibm.com> | 2009-02-03 15:19:23 +0000 |
|---|---|---|
| committer | Steve French <sfrench@us.ibm.com> | 2009-02-03 15:19:23 +0000 |
| commit | e1f81c8a417be466e85a38b61679aa6860ec7331 (patch) | |
| tree | 749815f74bfad330e83560a10fd5da5fc4d8c765 /kernel/trace/ring_buffer.c | |
| parent | 0e2bedaa394f74fa9f75ee937488c33d90039b5a (diff) | |
| parent | b1792e367053968f2ddb48bc911d314143ce6242 (diff) | |
| download | kernel-crypto-e1f81c8a417be466e85a38b61679aa6860ec7331.tar.gz kernel-crypto-e1f81c8a417be466e85a38b61679aa6860ec7331.tar.xz kernel-crypto-e1f81c8a417be466e85a38b61679aa6860ec7331.zip | |
Merge branch 'master' of /pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'kernel/trace/ring_buffer.c')
| -rw-r--r-- | kernel/trace/ring_buffer.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index 8b0daf0662e..bd38c5cfd8a 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -246,7 +246,7 @@ static inline int test_time_stamp(u64 delta) return 0; } -#define BUF_PAGE_SIZE (PAGE_SIZE - sizeof(struct buffer_data_page)) +#define BUF_PAGE_SIZE (PAGE_SIZE - offsetof(struct buffer_data_page, data)) /* * head_page == tail_page && head == tail then buffer is empty. @@ -1025,12 +1025,8 @@ __rb_reserve_next(struct ring_buffer_per_cpu *cpu_buffer, } if (next_page == head_page) { - if (!(buffer->flags & RB_FL_OVERWRITE)) { - /* reset write */ - if (tail <= BUF_PAGE_SIZE) - local_set(&tail_page->write, tail); + if (!(buffer->flags & RB_FL_OVERWRITE)) goto out_unlock; - } /* tail_page has not moved yet? */ if (tail_page == cpu_buffer->tail_page) { @@ -1105,6 +1101,10 @@ __rb_reserve_next(struct ring_buffer_per_cpu *cpu_buffer, return event; out_unlock: + /* reset write */ + if (tail <= BUF_PAGE_SIZE) + local_set(&tail_page->write, tail); + __raw_spin_unlock(&cpu_buffer->lock); local_irq_restore(flags); return NULL; @@ -2174,6 +2174,9 @@ rb_reset_cpu(struct ring_buffer_per_cpu *cpu_buffer) cpu_buffer->overrun = 0; cpu_buffer->entries = 0; + + cpu_buffer->write_stamp = 0; + cpu_buffer->read_stamp = 0; } /** |