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[CCID2]: Simplify interface

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This patch simplifies the interface of ccid2_hc_tx_alloc_seq():

   * ccid2_hc_tx_alloc_seq() is always called with an argument of
     CCID2_SEQBUF_LEN;

   * other code - ccid2_hc_tx_check_sanity() - even depends on the
     assumption that ccid2_hc_tx_alloc_seq() has been called with this
     particular size;

   * passing the `gfp_t' argument to ccid2_hc_tx_alloc_seq() is
     redundant with gfp_any().

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Gerrit Renker 2007-10-04 14:41:00 -07:00 committed by David S. Miller
parent 126acd5bf7
commit cd1f7d347c
1 changed files with 9 additions and 10 deletions
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19
net/dccp/ccids/ccid2.c
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@ -83,8 +83,7 @@ static void ccid2_hc_tx_check_sanity(const struct ccid2_hc_tx_sock *hctx)
#define ccid2_hc_tx_check_sanity(hctx)
#endif
static int ccid2_hc_tx_alloc_seq(struct ccid2_hc_tx_sock *hctx, int num,
gfp_t gfp)
static int ccid2_hc_tx_alloc_seq(struct ccid2_hc_tx_sock *hctx)
{
struct ccid2_seq *seqp;
int i;
@ -95,16 +94,16 @@ static int ccid2_hc_tx_alloc_seq(struct ccid2_hc_tx_sock *hctx, int num,
return -ENOMEM;
/* allocate buffer and initialize linked list */
seqp = kmalloc(sizeof(*seqp) * num, gfp);
seqp = kmalloc(CCID2_SEQBUF_LEN * sizeof(struct ccid2_seq), gfp_any());
if (seqp == NULL)
return -ENOMEM;
for (i = 0; i < (num - 1); i++) {
for (i = 0; i < (CCID2_SEQBUF_LEN - 1); i++) {
seqp[i].ccid2s_next = &seqp[i + 1];
seqp[i + 1].ccid2s_prev = &seqp[i];
}
seqp[num - 1].ccid2s_next = seqp;
seqp->ccid2s_prev = &seqp[num - 1];
seqp[CCID2_SEQBUF_LEN - 1].ccid2s_next = seqp;
seqp->ccid2s_prev = &seqp[CCID2_SEQBUF_LEN - 1];
/* This is the first allocation. Initiate the head and tail. */
if (hctx->ccid2hctx_seqbufc == 0)
@ -114,8 +113,8 @@ static int ccid2_hc_tx_alloc_seq(struct ccid2_hc_tx_sock *hctx, int num,
hctx->ccid2hctx_seqh->ccid2s_next = seqp;
seqp->ccid2s_prev = hctx->ccid2hctx_seqh;
hctx->ccid2hctx_seqt->ccid2s_prev = &seqp[num - 1];
seqp[num - 1].ccid2s_next = hctx->ccid2hctx_seqt;
hctx->ccid2hctx_seqt->ccid2s_prev = &seqp[CCID2_SEQBUF_LEN - 1];
seqp[CCID2_SEQBUF_LEN - 1].ccid2s_next = hctx->ccid2hctx_seqt;
}
/* store the original pointer to the buffer so we can free it */
@ -298,7 +297,7 @@ static void ccid2_hc_tx_packet_sent(struct sock *sk, int more, unsigned int len)
int rc;
ccid2_pr_debug("allocating more space in history\n");
rc = ccid2_hc_tx_alloc_seq(hctx, CCID2_SEQBUF_LEN, gfp_any());
rc = ccid2_hc_tx_alloc_seq(hctx);
BUG_ON(rc); /* XXX what do we do? */
next = hctx->ccid2hctx_seqh->ccid2s_next;
@ -771,7 +770,7 @@ static int ccid2_hc_tx_init(struct ccid *ccid, struct sock *sk)
hctx->ccid2hctx_seqbufc = 0;
/* XXX init ~ to window size... */
if (ccid2_hc_tx_alloc_seq(hctx, CCID2_SEQBUF_LEN, GFP_ATOMIC) != 0)
if (ccid2_hc_tx_alloc_seq(hctx))
return -ENOMEM;
hctx->ccid2hctx_sent = 0;