[dpdk-stable] [PATCH v2] devtools: fix check symbol change script

[Nithin Dabilpuram <ndabilpuram@marvell.com>]

Fix check symbol change script to detect new diff file when
it is in between  "--- /dev/null" to "b/lib/...".
Current awk line expects line to start with "a/..."
which is not always true for all diffs.
As a result if in_map was '1' earlier, it will not be changed
to '0' and we get check patch errors which are not true.

Fixes: 4bec48184e33 ("devtools: add checks for ABI symbol addition")
Cc: nhorman@tuxdriver.com
Cc: stable@dpdk.org

Signed-off-by: David Marchand <david.marchand@redhat.com>
Signed-off-by: Nithin Dabilpuram <ndabilpuram@marvell.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Tested-by: Jerin Jacob <jerinj@marvell.com>
---

v2:
- Updated logic from David to fix "not map" check 

 devtools/check-symbol-change.sh | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/devtools/check-symbol-change.sh b/devtools/check-symbol-change.sh
index c5434f3..ed2178e 100755
--- a/devtools/check-symbol-change.sh
+++ b/devtools/check-symbol-change.sh
@@ -17,13 +17,11 @@ build_map_changes()
 		# map files are altered, and all section/symbol names
 		# appearing between a triggering of this rule and the
 		# next trigger of this rule are associated with this file
-		/[-+] a\/.*\.map/ {map=$2; in_map=1}
+		/[-+] [ab]\/.*\.map/ {map=$2; in_map=1; next}
 
-		# Same pattern as above, only it matches on anything that
-		# does not end in 'map', indicating we have left the map chunk.
-		# When we hit this, turn off the in_map variable, which
-		# supresses the subordonate rules below
-		/[-+] a\/.*\.[^map]/ {in_map=0}
+		# The previous rule catches all .map files, anything else
+		# indicates we left the map chunk.
+		/[-+] [ab]\// {in_map=0}
 
 		# Triggering this rule, which starts a line and ends it
 		# with a { identifies a versioned section.  The section name is
-- 
2.8.4