[PATCH 3.16 214/370] gro: use min_t() in skb_gro_reset_offset()

Ben Hutchings
2017-03-10T12:20:14Z

From: Eric Dumazet <edumazet@google.com>

commit 7cfd5fd5a9813f1430290d20c0fead9b4582a307 upstream.

On 32bit arches, (skb->end - skb->data) is not 'unsigned int',
so we shall use min_t() instead of min() to avoid a compiler error.

Fixes: 1272ce87fa01 ("gro: Enter slow-path if there is no tailroom")
Reported-by: kernel test robot <fengguang.wu@intel.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
net/core/dev.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3920,8 +3920,9 @@ static void skb_gro_reset_offset(struct
pinfo->nr_frags &&
!PageHighMem(skb_frag_page(frag0))) {
NAPI_GRO_CB(skb)->frag0 = skb_frag_address(frag0);
- NAPI_GRO_CB(skb)->frag0_len = min(skb_frag_size(frag0),
- skb->end - skb->tail);
+ NAPI_GRO_CB(skb)->frag0_len = min_t(unsigned int,
+ skb_frag_size(frag0),
+ skb->end - skb->tail);
}
}