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af_packet: remove pgv.flags 

As we can check if an address is vmalloc address with is_vmalloc_addr(),
we remove pgv.flags. Then we may get more pg_vecs.

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Changli Gao 2010-12-01 02:52:57 +00:00 committed by David S. Miller
parent 0af55bb58f
commit c56b4d9012
1 changed files with 5 additions and 15 deletions
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20
net/packet/af_packet.c
View File

@ -167,7 +167,6 @@ static int packet_set_ring(struct sock *sk, struct tpacket_req *req,
#define PGV_FROM_VMALLOC 1
struct pgv {
char *buffer;
unsigned char flags;
};
struct packet_ring_buffer {
@ -2342,7 +2341,7 @@ static void free_pg_vec(struct pgv *pg_vec, unsigned int order,
for (i = 0; i < len; i++) {
if (likely(pg_vec[i].buffer)) {
if (pg_vec[i].flags & PGV_FROM_VMALLOC)
if (is_vmalloc_addr(pg_vec[i].buffer))
vfree(pg_vec[i].buffer);
else
free_pages((unsigned long)pg_vec[i].buffer,
@ -2353,8 +2352,7 @@ static void free_pg_vec(struct pgv *pg_vec, unsigned int order,
kfree(pg_vec);
}
static inline char *alloc_one_pg_vec_page(unsigned long order,
unsigned char *flags)
static inline char *alloc_one_pg_vec_page(unsigned long order)
{
char *buffer = NULL;
gfp_t gfp_flags = GFP_KERNEL | __GFP_COMP |
@ -2368,7 +2366,6 @@ static inline char *alloc_one_pg_vec_page(unsigned long order,
/*
* __get_free_pages failed, fall back to vmalloc
*/
*flags |= PGV_FROM_VMALLOC;
buffer = vzalloc((1 << order) * PAGE_SIZE);
if (buffer)
@ -2377,7 +2374,6 @@ static inline char *alloc_one_pg_vec_page(unsigned long order,
/*
* vmalloc failed, lets dig into swap here
*/
*flags = 0;
gfp_flags &= ~__GFP_NORETRY;
buffer = (char *)__get_free_pages(gfp_flags, order);
if (buffer)
@ -2400,8 +2396,7 @@ static struct pgv *alloc_pg_vec(struct tpacket_req *req, int order)
goto out;
for (i = 0; i < block_nr; i++) {
pg_vec[i].buffer = alloc_one_pg_vec_page(order,
&pg_vec[i].flags);
pg_vec[i].buffer = alloc_one_pg_vec_page(order);
if (unlikely(!pg_vec[i].buffer))
goto out_free_pgvec;
}
@ -2585,13 +2580,8 @@ static int packet_mmap(struct file *file, struct socket *sock,
void *kaddr = rb->pg_vec[i].buffer;
int pg_num;
for (pg_num = 0; pg_num < rb->pg_vec_pages;
pg_num++) {
if (rb->pg_vec[i].flags & PGV_FROM_VMALLOC)
page = vmalloc_to_page(kaddr);
else
page = virt_to_page(kaddr);
for (pg_num = 0; pg_num < rb->pg_vec_pages; pg_num++) {
page = pgv_to_page(kaddr);
err = vm_insert_page(vma, start, page);
if (unlikely(err))
goto out;