[PATCH 1/2] perf tools: Make check-headers.sh check based on kernel dir

[Jiri Olsa <jolsa@kernel.org>]

Changing the logic to compare files with paths relative
to kernel source base dir. This way we can keep the output
message for 2 unrelated files, which is coming in following
patch.

Link: http://lkml.kernel.org/n/tip-gpfv1vdqfjda80m451w9a7mt@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
 tools/perf/check-headers.sh | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/tools/perf/check-headers.sh b/tools/perf/check-headers.sh
index ea48aa6f8d19..9d466e853aec 100755
--- a/tools/perf/check-headers.sh
+++ b/tools/perf/check-headers.sh
@@ -69,8 +69,8 @@ check_2 () {
 
   test -f $file2 && {
     eval $cmd || {
-      echo "Warning: Kernel ABI header at 'tools/$file' differs from latest version at '$file'" >&2
-      echo diff -u tools/$file $file
+      echo "Warning: Kernel ABI header at '$file1' differs from latest version at '$file2'" >&2
+      echo diff -u $file1 $file2
     }
   }
 }
@@ -80,7 +80,7 @@ check () {
 
   shift
 
-  check_2 ../$file ../../$file $*
+  check_2 tools/$file $file $*
 }
 
 # Check if we have the kernel headers (tools/perf/../../include), else
@@ -88,6 +88,8 @@ check () {
 # differences.
 test -d ../../include || exit 0
 
+pushd ../.. > /dev/null
+
 # simple diff check
 for i in $HEADERS; do
   check $i -B
@@ -98,3 +100,5 @@ check arch/x86/lib/memcpy_64.S        '-I "^EXPORT_SYMBOL" -I "^#include <asm/ex
 check arch/x86/lib/memset_64.S        '-I "^EXPORT_SYMBOL" -I "^#include <asm/export.h>"'
 check include/uapi/asm-generic/mman.h '-I "^#include <\(uapi/\)*asm-generic/mman-common.h>"'
 check include/uapi/linux/mman.h       '-I "^#include <\(uapi/\)*asm/mman.h>"'
+
+popd > /dev/null
-- 
2.17.1