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Index: head/sys/kern/subr_witness.c
===================================================================
--- head/sys/kern/subr_witness.c
+++ head/sys/kern/subr_witness.c
@@ -569,7 +569,7 @@
/*
* BPF
*/
- { "bpf global lock", &lock_class_mtx_sleep },
+ { "bpf global lock", &lock_class_sx },
{ "bpf interface lock", &lock_class_rw },
{ "bpf cdev lock", &lock_class_mtx_sleep },
{ NULL, NULL },
Index: head/sys/net/bpf.c
===================================================================
--- head/sys/net/bpf.c
+++ head/sys/net/bpf.c
@@ -159,6 +159,9 @@
#define BIOCSETFNR32 _IOW('B', 130, struct bpf_program32)
#endif
+#define BPF_LOCK() sx_xlock(&bpf_sx)
+#define BPF_UNLOCK() sx_xunlock(&bpf_sx)
+#define BPF_LOCK_ASSERT() sx_assert(&bpf_sx, SA_XLOCKED)
/*
* bpf_iflist is a list of BPF interface structures, each corresponding to a
* specific DLT. The same network interface might have several BPF interface
@@ -166,7 +169,7 @@
* frames, ethernet frames, etc).
*/
static LIST_HEAD(, bpf_if) bpf_iflist, bpf_freelist;
-static struct mtx bpf_mtx; /* bpf global lock */
+static struct sx bpf_sx; /* bpf global lock */
static int bpf_bpfd_cnt;
static void bpf_attachd(struct bpf_d *, struct bpf_if *);
@@ -2821,7 +2824,7 @@
{
struct cdev *dev;
- mtx_init(&bpf_mtx, "bpf global lock", NULL, MTX_DEF);
+ sx_init(&bpf_sx, "bpf global lock");
LIST_INIT(&bpf_iflist);
LIST_INIT(&bpf_freelist);
Index: head/sys/net/bpfdesc.h
===================================================================
--- head/sys/net/bpfdesc.h
+++ head/sys/net/bpfdesc.h
@@ -118,9 +118,6 @@
#define BPF_PID_REFRESH(bd, td) (bd)->bd_pid = (td)->td_proc->p_pid
#define BPF_PID_REFRESH_CUR(bd) (bd)->bd_pid = curthread->td_proc->p_pid
-#define BPF_LOCK() mtx_lock(&bpf_mtx)
-#define BPF_UNLOCK() mtx_unlock(&bpf_mtx)
-#define BPF_LOCK_ASSERT() mtx_assert(&bpf_mtx, MA_OWNED)
/*
* External representation of the bpf descriptor
*/

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