[NET]: Get rid of alloc_skb_from_cache

Since this was added originally for Xen, and Xen has recently (~2.6.18)
stopped using this function, we can safely get rid of it.  Good timing
too since this function has started to bit rot.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/arch/x86_64/kernel/functionlist b/arch/x86_64/kernel/functionlist
index 01fa23580c85f4dd707f166dca06f49226924078..7ae18ec12454e05ef4e45c56bb685a42d61559ca 100644 (file)
--- a/arch/x86_64/kernel/functionlist
+++ b/arch/x86_64/kernel/functionlist
@@ -514,7 +514,6 @@
 *(.text.dentry_open)
 *(.text.dentry_iput)
 *(.text.bio_alloc)
-*(.text.alloc_skb_from_cache)
 *(.text.wait_on_page_bit)
 *(.text.vfs_readdir)
 *(.text.vfs_lstat)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 82f43ad478c7848be70cefa382c123956b7db562..0e86b6007a0a16a4f71fd5e61e9e04acc54db8f9 100644 (file)
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -346,9 +346,6 @@ static inline struct sk_buff *alloc_skb_fclone(unsigned int size,
        return __alloc_skb(size, priority, 1, -1);
 }
 
-extern struct sk_buff *alloc_skb_from_cache(struct kmem_cache *cp,
-                                           unsigned int size,
-                                           gfp_t priority);
 extern void           kfree_skbmem(struct sk_buff *skb);
 extern struct sk_buff *skb_clone(struct sk_buff *skb,
                                 gfp_t priority);

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 87573ae35b025c6d4d971ff0b65cbf8931d1b973..336958fbbcb2bc87b5391240846d21260fa72765 100644 (file)
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -196,61 +196,6 @@ nodata:
        goto out;
 }
 
-/**
- *     alloc_skb_from_cache    -       allocate a network buffer
- *     @cp: kmem_cache from which to allocate the data area
- *           (object size must be big enough for @size bytes + skb overheads)
- *     @size: size to allocate
- *     @gfp_mask: allocation mask
- *
- *     Allocate a new &sk_buff. The returned buffer has no headroom and
- *     tail room of size bytes. The object has a reference count of one.
- *     The return is the buffer. On a failure the return is %NULL.
- *
- *     Buffers may only be allocated from interrupts using a @gfp_mask of
- *     %GFP_ATOMIC.
- */
-struct sk_buff *alloc_skb_from_cache(struct kmem_cache *cp,
-                                    unsigned int size,
-                                    gfp_t gfp_mask)
-{
-       struct sk_buff *skb;
-       u8 *data;
-
-       /* Get the HEAD */
-       skb = kmem_cache_alloc(skbuff_head_cache,
-                              gfp_mask & ~__GFP_DMA);
-       if (!skb)
-               goto out;
-
-       /* Get the DATA. */
-       size = SKB_DATA_ALIGN(size);
-       data = kmem_cache_alloc(cp, gfp_mask);
-       if (!data)
-               goto nodata;
-
-       memset(skb, 0, offsetof(struct sk_buff, truesize));
-       skb->truesize = size + sizeof(struct sk_buff);
-       atomic_set(&skb->users, 1);
-       skb->head = data;
-       skb->data = data;
-       skb->tail = data;
-       skb->end  = data + size;
-
-       atomic_set(&(skb_shinfo(skb)->dataref), 1);
-       skb_shinfo(skb)->nr_frags  = 0;
-       skb_shinfo(skb)->gso_size = 0;
-       skb_shinfo(skb)->gso_segs = 0;
-       skb_shinfo(skb)->gso_type = 0;
-       skb_shinfo(skb)->frag_list = NULL;
-out:
-       return skb;
-nodata:
-       kmem_cache_free(skbuff_head_cache, skb);
-       skb = NULL;
-       goto out;
-}
-
 /**
  *     __netdev_alloc_skb - allocate an skbuff for rx on a specific device
  *     @dev: network device to receive on