Python 3.6 introduced a DeprecationWarning for invalid escape sequences.
This is upgraded to a SyntaxWarning in Python 3.12, and will eventually
be a syntax error.

Fix these now to get ahead of it before it's an error.

Signed-off-by: Benjamin Gray <[email protected]>
---
 tools/power/pm-graph/bootgraph.py | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/tools/power/pm-graph/bootgraph.py 
b/tools/power/pm-graph/bootgraph.py
index f96f50e0c336..c53cfdba0365 100755
--- a/tools/power/pm-graph/bootgraph.py
+++ b/tools/power/pm-graph/bootgraph.py
@@ -77,12 +77,12 @@ class SystemValues(aslib.SystemValues):
                        fp.close()
                self.testdir = datetime.now().strftime('boot-%y%m%d-%H%M%S')
        def kernelVersion(self, msg):
-               m = re.match('^[Ll]inux *[Vv]ersion *(?P<v>\S*) .*', msg)
+               m = re.match(r'^[Ll]inux *[Vv]ersion *(?P<v>\S*) .*', msg)
                if m:
                        return m.group('v')
                return 'unknown'
        def checkFtraceKernelVersion(self):
-               m = re.match('^(?P<x>[0-9]*)\.(?P<y>[0-9]*)\.(?P<z>[0-9]*).*', 
self.kernel)
+               m = re.match(r'^(?P<x>[0-9]*)\.(?P<y>[0-9]*)\.(?P<z>[0-9]*).*', 
self.kernel)
                if m:
                        val = tuple(map(int, m.groups()))
                        if val >= (4, 10, 0):
@@ -324,7 +324,7 @@ def parseKernelLog():
                idx = line.find('[')
                if idx > 1:
                        line = line[idx:]
-               m = re.match('[ \t]*(\[ *)(?P<ktime>[0-9\.]*)(\]) (?P<msg>.*)', 
line)
+               m = re.match(r'[ \t]*(\[ *)(?P<ktime>[0-9\.]*)(\]) 
(?P<msg>.*)', line)
                if(not m):
                        continue
                ktime = float(m.group('ktime'))
@@ -336,20 +336,20 @@ def parseKernelLog():
                        if(not sysvals.stamp['kernel']):
                                sysvals.stamp['kernel'] = 
sysvals.kernelVersion(msg)
                        continue
-               m = re.match('.* setting system clock to (?P<d>[0-9\-]*)[ 
A-Z](?P<t>[0-9:]*) UTC.*', msg)
+               m = re.match(r'.* setting system clock to (?P<d>[0-9\-]*)[ 
A-Z](?P<t>[0-9:]*) UTC.*', msg)
                if(m):
                        bt = datetime.strptime(m.group('d')+' '+m.group('t'), 
'%Y-%m-%d %H:%M:%S')
                        bt = bt - timedelta(seconds=int(ktime))
                        data.boottime = bt.strftime('%Y-%m-%d_%H:%M:%S')
                        sysvals.stamp['time'] = bt.strftime('%B %d %Y, %I:%M:%S 
%p')
                        continue
-               m = re.match('^calling *(?P<f>.*)\+.* @ (?P<p>[0-9]*)', msg)
+               m = re.match(r'^calling *(?P<f>.*)\+.* @ (?P<p>[0-9]*)', msg)
                if(m):
                        func = m.group('f')
                        pid = int(m.group('p'))
                        devtemp[func] = (ktime, pid)
                        continue
-               m = re.match('^initcall *(?P<f>.*)\+.* returned (?P<r>.*) after 
(?P<t>.*) usecs', msg)
+               m = re.match(r'^initcall *(?P<f>.*)\+.* returned (?P<r>.*) 
after (?P<t>.*) usecs', msg)
                if(m):
                        data.valid = True
                        data.end = ktime
-- 
2.41.0

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