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| author | Julia Lawall <julia@diku.dk> | 2008-10-15 22:05:23 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-16 11:21:52 -0700 |
| commit | 435263702ef0fc9ffdc6301a71c03b1d9ac0f1e0 (patch) | |
| tree | 43a0b94a415559b55a60cadecf04d819f2c9285c | |
| parent | 2b252c541158cfed9d7e5b019b894fe2174f5908 (diff) | |
| download | linux-435263702ef0fc9ffdc6301a71c03b1d9ac0f1e0.tar.gz | |
drivers/net/xen-netfront.c: Use DIV_ROUND_UP
The kernel.h macro DIV_ROUND_UP performs the computation (((n) + (d) - 1) / (d)) but is perhaps more readable. An extract of the semantic patch that makes this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @haskernel@ @@ #include <linux/kernel.h> @depends on haskernel@ expression n,d; @@ ( - (n + d - 1) / d + DIV_ROUND_UP(n,d) | - (n + (d - 1)) / d + DIV_ROUND_UP(n,d) ) @depends on haskernel@ expression n,d; @@ - DIV_ROUND_UP((n),d) + DIV_ROUND_UP(n,d) @depends on haskernel@ expression n,d; @@ - DIV_ROUND_UP(n,(d)) + DIV_ROUND_UP(n,d) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Acked-by: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/net/xen-netfront.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c index 3c3dd403f5dd..5c7a87e38951 100644 --- a/drivers/net/xen-netfront.c +++ b/drivers/net/xen-netfront.c @@ -471,7 +471,7 @@ static int xennet_start_xmit(struct sk_buff *skb, struct net_device *dev) unsigned int offset = offset_in_page(data); unsigned int len = skb_headlen(skb); - frags += (offset + len + PAGE_SIZE - 1) / PAGE_SIZE; + frags += DIV_ROUND_UP(offset + len, PAGE_SIZE); if (unlikely(frags > MAX_SKB_FRAGS + 1)) { printk(KERN_ALERT "xennet: skb rides the rocket: %d frags\n", frags); |