net: remove k{un}map_skb_frag()

Since commit 3e4d3af501 (mm: stack based kmap_atomic()) we dont have
to disable BH anymore while mapping skb frags.

We can remove kmap_skb_frag() / kunmap_skb_frag() helpers and use
kmap_atomic() / kunmap_atomic()

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 21 insertions, 21 deletions

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index a690cae91cd..b2595adb605 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -68,8 +68,7 @@
 #include <asm/uaccess.h>
 #include <asm/system.h>
 #include <trace/events/skb.h>
-
-#include "kmap_skb.h"
+#include <linux/highmem.h>
 
 static struct kmem_cache *skbuff_head_cache __read_mostly;
 static struct kmem_cache *skbuff_fclone_cache __read_mostly;
@@ -708,10 +707,10 @@ int skb_copy_ubufs(struct sk_buff *skb, gfp_t gfp_mask)
                         }
                         return -ENOMEM;
                 }
-                vaddr = kmap_skb_frag(&skb_shinfo(skb)->frags[i]);
+                vaddr = kmap_atomic(skb_frag_page(f));
                 memcpy(page_address(page),
                        vaddr + f->page_offset, skb_frag_size(f));
-                kunmap_skb_frag(vaddr);
+                kunmap_atomic(vaddr);
                 page->private = (unsigned long)head;
                 head = page;
         }
@@ -1486,21 +1485,22 @@ int skb_copy_bits(const struct sk_buff *skb, int offset, void *to, int len)
 
         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
                 int end;
+                skb_frag_t *f = &skb_shinfo(skb)->frags[i];
 
                 WARN_ON(start > offset + len);
 
-                end = start + skb_frag_size(&skb_shinfo(skb)->frags[i]);
+                end = start + skb_frag_size(f);
                 if ((copy = end - offset) > 0) {
                         u8 *vaddr;
 
                         if (copy > len)
                                 copy = len;
 
-                        vaddr = kmap_skb_frag(&skb_shinfo(skb)->frags[i]);
+                        vaddr = kmap_atomic(skb_frag_page(f));
                         memcpy(to,
-                               vaddr + skb_shinfo(skb)->frags[i].page_offset+
-                               offset - start, copy);
-                        kunmap_skb_frag(vaddr);
+                               vaddr + f->page_offset + offset - start,
+                               copy);
+                        kunmap_atomic(vaddr);
 
                         if ((len -= copy) == 0)
                                 return 0;
@@ -1805,10 +1805,10 @@ int skb_store_bits(struct sk_buff *skb, int offset, const void *from, int len)
                         if (copy > len)
                                 copy = len;
 
-                        vaddr = kmap_skb_frag(frag);
+                        vaddr = kmap_atomic(skb_frag_page(frag));
                         memcpy(vaddr + frag->page_offset + offset - start,
                                from, copy);
-                        kunmap_skb_frag(vaddr);
+                        kunmap_atomic(vaddr);
 
                         if ((len -= copy) == 0)
                                 return 0;
@@ -1868,21 +1868,21 @@ __wsum skb_checksum(const struct sk_buff *skb, int offset,
 
         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
                 int end;
+                skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
 
                 WARN_ON(start > offset + len);
 
-                end = start + skb_frag_size(&skb_shinfo(skb)->frags[i]);
+                end = start + skb_frag_size(frag);
                 if ((copy = end - offset) > 0) {
                         __wsum csum2;
                         u8 *vaddr;
-                        skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
 
                         if (copy > len)
                                 copy = len;
-                        vaddr = kmap_skb_frag(frag);
+                        vaddr = kmap_atomic(skb_frag_page(frag));
                         csum2 = csum_partial(vaddr + frag->page_offset +
                                              offset - start, copy, 0);
-                        kunmap_skb_frag(vaddr);
+                        kunmap_atomic(vaddr);
                         csum = csum_block_add(csum, csum2, pos);
                         if (!(len -= copy))
                                 return csum;
@@ -1954,12 +1954,12 @@ __wsum skb_copy_and_csum_bits(const struct sk_buff *skb, int offset,
 
                         if (copy > len)
                                 copy = len;
-                        vaddr = kmap_skb_frag(frag);
+                        vaddr = kmap_atomic(skb_frag_page(frag));
                         csum2 = csum_partial_copy_nocheck(vaddr +
                                                           frag->page_offset +
                                                           offset - start, to,
                                                           copy, 0);
-                        kunmap_skb_frag(vaddr);
+                        kunmap_atomic(vaddr);
                         csum = csum_block_add(csum, csum2, pos);
                         if (!(len -= copy))
                                 return csum;
@@ -2479,7 +2479,7 @@ next_skb:
 
                 if (abs_offset < block_limit) {
                         if (!st->frag_data)
-                                st->frag_data = kmap_skb_frag(frag);
+                                st->frag_data = kmap_atomic(skb_frag_page(frag));
 
                         *data = (u8 *) st->frag_data + frag->page_offset +
                                 (abs_offset - st->stepped_offset);
@@ -2488,7 +2488,7 @@ next_skb:
                 }
 
                 if (st->frag_data) {
-                        kunmap_skb_frag(st->frag_data);
+                        kunmap_atomic(st->frag_data);
                         st->frag_data = NULL;
                 }
 
@@ -2497,7 +2497,7 @@ next_skb:
         }
 
         if (st->frag_data) {
-                kunmap_skb_frag(st->frag_data);
+                kunmap_atomic(st->frag_data);
                 st->frag_data = NULL;
         }
 
@@ -2525,7 +2525,7 @@ EXPORT_SYMBOL(skb_seq_read);
 void skb_abort_seq_read(struct skb_seq_state *st)
 {
         if (st->frag_data)
-                kunmap_skb_frag(st->frag_data);
+                kunmap_atomic(st->frag_data);
 }
 EXPORT_SYMBOL(skb_abort_seq_read);