Frees an mbuf structure and any associated external storage area.
#include <sys/types.h>
#include <sys/errno.h>
#include <sys/mbuf.h>struct mbuf *m_free( m)
struct mbuf *m;
| Item | Description |
|---|---|
| m | Specifies the mbuf structure to be freed. |
The m_free kernel service returns an mbuf structure to the buffer pool. If the mbuf structure specified by the m parameter has an attached cluster (that is, a paged-size mbuf structure), the m_free kernel service also frees the associated external storage.
The m_free kernel service can be called from either the process or interrupt environment.
If the mbuf structure specified by the m parameter is the head of an mbuf chain, the m_free service returns the next mbuf structure in the chain. A null value is returned if the structure specified by the m parameter is not part of an mbuf chain.