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authorSowmini Varadhan <sowmini.varadhan@oracle.com>2018-02-15 10:49:32 -0800
committerDavid S. Miller <davem@davemloft.net>2018-02-16 16:04:16 -0500
commit6f89dbce8e1134458de8a8e376acaaca4eee602e (patch)
tree4db6ba33d7bd7bc250b69d86a864b57666bbc75a
parentee99b2d8bf4ad6d03046a8c2f25bad7cfd9de64a (diff)
downloadlinux-6f89dbce8e1134458de8a8e376acaaca4eee602e.tar.bz2
skbuff: export mm_[un]account_pinned_pages for other modules
RDS would like to use the helper functions for managing pinned pages added by Commit a91dbff551a6 ("sock: ulimit on MSG_ZEROCOPY pages") Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Acked-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/linux/skbuff.h3
-rw-r--r--net/core/skbuff.c6
2 files changed, 7 insertions, 2 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 5ebc0f869720..b1cc38af53e1 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -466,6 +466,9 @@ struct ubuf_info {
#define skb_uarg(SKB) ((struct ubuf_info *)(skb_shinfo(SKB)->destructor_arg))
+int mm_account_pinned_pages(struct mmpin *mmp, size_t size);
+void mm_unaccount_pinned_pages(struct mmpin *mmp);
+
struct ubuf_info *sock_zerocopy_alloc(struct sock *sk, size_t size);
struct ubuf_info *sock_zerocopy_realloc(struct sock *sk, size_t size,
struct ubuf_info *uarg);
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 09bd89c90a71..1a7485a2cdfa 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -890,7 +890,7 @@ struct sk_buff *skb_morph(struct sk_buff *dst, struct sk_buff *src)
}
EXPORT_SYMBOL_GPL(skb_morph);
-static int mm_account_pinned_pages(struct mmpin *mmp, size_t size)
+int mm_account_pinned_pages(struct mmpin *mmp, size_t size)
{
unsigned long max_pg, num_pg, new_pg, old_pg;
struct user_struct *user;
@@ -919,14 +919,16 @@ static int mm_account_pinned_pages(struct mmpin *mmp, size_t size)
return 0;
}
+EXPORT_SYMBOL_GPL(mm_account_pinned_pages);
-static void mm_unaccount_pinned_pages(struct mmpin *mmp)
+void mm_unaccount_pinned_pages(struct mmpin *mmp)
{
if (mmp->user) {
atomic_long_sub(mmp->num_pg, &mmp->user->locked_vm);
free_uid(mmp->user);
}
}
+EXPORT_SYMBOL_GPL(mm_unaccount_pinned_pages);
struct ubuf_info *sock_zerocopy_alloc(struct sock *sk, size_t size)
{