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| author | Brice Goglin <brice@myri.com> | 2010-02-24 12:11:19 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-02-26 04:18:34 -0800 |
| commit | 2a3f279034b46204b50408aa2c25ee0882120147 (patch) | |
| tree | 83775e790a8c4a94ed8bc298cb9d6f4d65e4b8b7 /drivers/net/myri10ge | |
| parent | 45bb00609022ecf1d97e083666c68c74d237b799 (diff) | |
| download | linux-2a3f279034b46204b50408aa2c25ee0882120147.tar.gz linux-2a3f279034b46204b50408aa2c25ee0882120147.tar.bz2 linux-2a3f279034b46204b50408aa2c25ee0882120147.zip | |
myri10ge: optimize 4k-boundary check when stocking rx pages
Small optimization to the code which checks to see if we'd cross
a 4K boundary when stocking RX ring.
Signed-off-by: Brice Goglin <brice@myri.com>
Signed-off-by: Andrew Gallatin <gallatin@myri.com>
Signed-off-by: Guillaume Morin <guillaume@morinfr.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/myri10ge')
| -rw-r--r-- | drivers/net/myri10ge/myri10ge.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/net/myri10ge/myri10ge.c b/drivers/net/myri10ge/myri10ge.c index aae2ddb5d827..676c513e12fc 100644 --- a/drivers/net/myri10ge/myri10ge.c +++ b/drivers/net/myri10ge/myri10ge.c @@ -77,7 +77,7 @@ #include "myri10ge_mcp.h" #include "myri10ge_mcp_gen_header.h" -#define MYRI10GE_VERSION_STR "1.5.1-1.453" +#define MYRI10GE_VERSION_STR "1.5.2-1.459" MODULE_DESCRIPTION("Myricom 10G driver (10GbE)"); MODULE_AUTHOR("Maintainer: help@myri.com"); @@ -1200,6 +1200,9 @@ myri10ge_alloc_rx_pages(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx, { struct page *page; int idx; +#if MYRI10GE_ALLOC_SIZE > 4096 + int end_offset; +#endif if (unlikely(rx->watchdog_needed && !watchdog)) return; @@ -1241,9 +1244,9 @@ myri10ge_alloc_rx_pages(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx, #if MYRI10GE_ALLOC_SIZE > 4096 /* don't cross a 4KB boundary */ - if ((rx->page_offset >> 12) != - ((rx->page_offset + bytes - 1) >> 12)) - rx->page_offset = (rx->page_offset + 4096) & ~4095; + end_offset = rx->page_offset + bytes - 1; + if ((unsigned)(rx->page_offset ^ end_offset) > 4095) + rx->page_offset = end_offset & ~4095; #endif rx->fill_cnt++; |