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>
diff --git a/drivers/net/myri10ge/myri10ge.c b/drivers/net/myri10ge/myri10ge.c
index aae2ddb..676c513 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 @@
{
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 @@
#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++;