[PATCH] checkpatch: add --fix option to IS_ENABLED_CONFIG check

[Dwaipayan Ray]

Documentation/process/coding-style.rst specifies the use of
IS_ENABLED macro:

Within code, where possible, use the IS_ENABLED macro to convert a Kconfig
symbol into a C boolean expression, and use it in a normal C conditional:

        if (IS_ENABLED(CONFIG_SOMETHING)) {
                ...
        }

checkpatch correspondingly has a check for IS_ENABLED() without
CONFIG_<FOO>.
Add a --fix option to the check to automatically correct the argument.

Macros like:
 #if IS_ENABLED(THERMAL)

is corrected to:
 #if IS_ENABLED(CONFIG_THERMAL)

Signed-off-by: Dwaipayan Ray <dwaipayanr...@gmail.com>
---
 scripts/checkpatch.pl | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 7b086d1cd6c2..751cd13622b9 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -6877,8 +6877,11 @@ sub process {
 
 # check for IS_ENABLED() without CONFIG_<FOO> ($rawline for comments too)
                if ($rawline =~ /\bIS_ENABLED\s*\(\s*(\w+)\s*\)/ && $1 !~ 
/^${CONFIG_}/) {
-                       WARN("IS_ENABLED_CONFIG",
-                            "IS_ENABLED($1) is normally used as 
IS_ENABLED(${CONFIG_}$1)\n" . $herecurr);
+                       if (WARN("IS_ENABLED_CONFIG",
+                                "IS_ENABLED($1) is normally used as 
IS_ENABLED(${CONFIG_}$1)\n" . $herecurr) &&
+                           $fix) {
+                               $fixed[$fixlinenr] =~ 
s/\bIS_ENABLED\s*\(\s*(\w+)\s*\)/IS_ENABLED(${CONFIG_}$1)/;
+                       }
                }
 
 # check for #if defined CONFIG_<FOO> || defined CONFIG_<FOO>_MODULE
-- 
2.27.0