diff options
Diffstat (limited to 'sys/kern/subr_sfbuf.c')
| -rw-r--r-- | sys/kern/subr_sfbuf.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/sys/kern/subr_sfbuf.c b/sys/kern/subr_sfbuf.c index e4309d1..1950f69 100644 --- a/sys/kern/subr_sfbuf.c +++ b/sys/kern/subr_sfbuf.c @@ -201,6 +201,22 @@ sf_buf_free(struct sf_buf *sf) mtx_unlock(&sf_buf_lock); } +void +sf_buf_ref(struct sf_buf *sf) +{ + +#ifdef SFBUF_OPTIONAL_DIRECT_MAP + if (SFBUF_OPTIONAL_DIRECT_MAP) + return; +#endif + + KASSERT(sf->ref_count > 0, ("%s: sf %p not allocated", __func__, sf)); + + mtx_lock(&sf_buf_lock); + sf->ref_count++; + mtx_unlock(&sf_buf_lock); +} + #ifdef SFBUF_PROCESS_PAGE /* * Run callback function on sf_buf that holds a certain page. |
