[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>

3 files changed, 0 insertions, 59 deletions

diff --git a/arch/x86_64/kernel/functionlist b/arch/x86_64/kernel/functionlist
index 01fa23580c8..7ae18ec1245 100644
--- 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 82f43ad478c..0e86b6007a0 100644
--- 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 87573ae35b0..336958fbbcb 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -197,61 +197,6 @@ nodata:
 }
 
 /**
- *      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
  *      @length: length to allocate