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IPv6: convert mc_lock to spinlock 

Only used for writing, so convert to spinlock

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger 2010-02-17 18:48:44 -08:00 committed by David S. Miller
parent dfa1a04109
commit 6457d26bd4
2 changed files with 11 additions and 10 deletions
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2
include/net/if_inet6.h
View File

@ -157,7 +157,7 @@ struct inet6_dev {
struct ifmcaddr6 *mc_list;
struct ifmcaddr6 *mc_tomb;
rwlock_t mc_lock;
spinlock_t mc_lock;
unsigned char mc_qrv;
unsigned char mc_gq_running;
unsigned char mc_ifc_count;

19
net/ipv6/mcast.c
View File

@ -793,10 +793,10 @@ static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im)
}
spin_unlock_bh(&im->mca_lock);
write_lock_bh(&idev->mc_lock);
spin_lock_bh(&idev->mc_lock);
pmc->next = idev->mc_tomb;
idev->mc_tomb = pmc;
write_unlock_bh(&idev->mc_lock);
spin_unlock_bh(&idev->mc_lock);
}
static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *pmca)
@ -804,7 +804,7 @@ static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *pmca)
struct ifmcaddr6 *pmc, *pmc_prev;
struct ip6_sf_list *psf, *psf_next;
write_lock_bh(&idev->mc_lock);
spin_lock_bh(&idev->mc_lock);
pmc_prev = NULL;
for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) {
if (ipv6_addr_equal(&pmc->mca_addr, pmca))
@ -817,7 +817,8 @@ static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *pmca)
else
idev->mc_tomb = pmc->next;
}
write_unlock_bh(&idev->mc_lock);
spin_unlock_bh(&idev->mc_lock);
if (pmc) {
for (psf=pmc->mca_tomb; psf; psf=psf_next) {
psf_next = psf->sf_next;
@ -832,10 +833,10 @@ static void mld_clear_delrec(struct inet6_dev *idev)
{
struct ifmcaddr6 *pmc, *nextpmc;
write_lock_bh(&idev->mc_lock);
spin_lock_bh(&idev->mc_lock);
pmc = idev->mc_tomb;
idev->mc_tomb = NULL;
write_unlock_bh(&idev->mc_lock);
spin_unlock_bh(&idev->mc_lock);
for (; pmc; pmc = nextpmc) {
nextpmc = pmc->next;
@ -1696,7 +1697,7 @@ static void mld_send_cr(struct inet6_dev *idev)
int type, dtype;
read_lock_bh(&idev->lock);
write_lock_bh(&idev->mc_lock);
spin_lock(&idev->mc_lock);
/* deleted MCA's */
pmc_prev = NULL;
@ -1730,7 +1731,7 @@ static void mld_send_cr(struct inet6_dev *idev)
} else
pmc_prev = pmc;
}
write_unlock_bh(&idev->mc_lock);
spin_unlock(&idev->mc_lock);
/* change recs */
for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
@ -2311,7 +2312,7 @@ void ipv6_mc_up(struct inet6_dev *idev)
void ipv6_mc_init_dev(struct inet6_dev *idev)
{
write_lock_bh(&idev->lock);
rwlock_init(&idev->mc_lock);
spin_lock_init(&idev->mc_lock);
idev->mc_gq_running = 0;
setup_timer(&idev->mc_gq_timer, mld_gq_timer_expire,
(unsigned long)idev);