[Intel-wired-lan] [PATCH v4] intel: igb: igb_ethtool.c: Convert kmap() to kmap_local_page()

Alaa Mohamed eng.alaamohamedsoliman.am at gmail.com
Mon Apr 18 06:14:30 UTC 2022


The use of kmap() is being deprecated in favor of kmap_local_page()
where it is feasible.

With kmap_local_page(), the mapping is per thread, CPU local and not
globally visible. Therefore igb_check_lbtest_frame() is a function
where the use of kmap_local_page() in place of kmap() is correctly
suited.

Signed-off-by: Alaa Mohamed <eng.alaamohamedsoliman.am at gmail.com>
---
changes in V2:
	fix kunmap_local path value to take address of the mapped page.
---
changes in V3:
	edit commit message to be clearer
---
changes in V4:
	edit the commit message
---
 drivers/net/ethernet/intel/igb/igb_ethtool.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/igb/igb_ethtool.c b/drivers/net/ethernet/intel/igb/igb_ethtool.c
index 2a5782063f4c..c14fc871dd41 100644
--- a/drivers/net/ethernet/intel/igb/igb_ethtool.c
+++ b/drivers/net/ethernet/intel/igb/igb_ethtool.c
@@ -1798,14 +1798,14 @@ static int igb_check_lbtest_frame(struct igb_rx_buffer *rx_buffer,
 
 	frame_size >>= 1;
 
-	data = kmap(rx_buffer->page);
+	data = kmap_local_page(rx_buffer->page);
 
 	if (data[3] != 0xFF ||
 	    data[frame_size + 10] != 0xBE ||
 	    data[frame_size + 12] != 0xAF)
 		match = false;
 
-	kunmap(rx_buffer->page);
+	kunmap_local(data);
 
 	return match;
 }
-- 
2.35.2



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