scripts/bloat-o-meter: don't fail with division by 0

Under some circumstances it's possible to get a divider 0 which crashes the script. Traceback (most recent call last): File "linux/scripts/bloat-o-meter", line 98, in <module> print_result("Function", "tTdDbBrR", 2) File "linux/scripts/bloat-o-meter", line 87, in print_result (otot, ntot, (ntot - otot)*100.0/otot)) ZeroDivisionError: float division by zero Hide this by checking the divider first. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Andy Shevchenko <[email protected]> Cc: Alexey Dobriyan <[email protected]> Cc: Vaneet Narang <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
laijs · Nov 30, 2017 · edbddb8 · edbddb8
1 parent d5dabd6
commit edbddb8
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/scripts/bloat-o-meter b/scripts/bloat-o-meter
@@ -83,8 +83,11 @@ def print_result(symboltype, symbolformat, argc):
     for d, n in delta:
         if d: print("%-40s %7s %7s %+7d" % (n, old.get(n,"-"), new.get(n,"-"), d))
 
-    print("Total: Before=%d, After=%d, chg %+.2f%%" % \
-        (otot, ntot, (ntot - otot)*100.0/otot))
+    if otot:
+        percent = (ntot - otot) * 100.0 / otot
+    else:
+        percent = 0
+    print("Total: Before=%d, After=%d, chg %+.2f%%" % (otot, ntot, percent))
 
 if sys.argv[1] == "-c":
     print_result("Function", "tT", 3)