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Subject[RFC PATCH v1] checkpatch: Handle FILE pointer type
Date
When using a "FILE *" type, checkpatch considers this an error.  Fix
this by explicitly defining "FILE" as a common type.

This is useful for user space patches.

With this patch, we now get:
static void a(FILE *const b)

<E> <E> <_>WS( )
<E> <E> <_>IDENT(static)
<E> <V> <_>WS( )
<E> <V> <_>DECLARE(void )
<E> <T> <_>FUNC(a)
<E> <V> <V>PAREN('(')
<EV> <N> <_>DECLARE(FILE *const )
<EV> <T> <_>IDENT(b)
<EV> <V> <_>PAREN(')') -> V
<E> <V> <_>WS(
)
32 > . static void a(FILE *const b)
32 > EEVVVVVVVTTTTTVNTTTTTTTTTTTTVVV
32 > ______________________________

Another error may be throw when we use FIXTURE_{DATA,VARIANT}() structs,
as defined in kselftest_harness.h . The commented
$typeKselftestHarnessTypedefs should fix it but such definition is
considered as a function instead, because of the closing parenthesis.
I'd like some help to fix this as well.

With $typeKselftestHarnessTypedefs added to $typeTypedefs, we get:
static void c(const FIXTURE_VARIANT(d) *const e)

<E> <E> <_>WS( )
<E> <E> <_>IDENT(static)
<E> <V> <_>WS( )
<E> <V> <_>DECLARE(void )
<E> <T> <_>FUNC(c)
<E> <V> <V>PAREN('(')
<EV> <N> <_>MODIFIER(const)
<EV> <T> <_>WS( )
<EV> <T> <_>FUNC(FIXTURE_VARIANT)
<EV> <V> <V>PAREN('(')
<EVV> <N> <_>IDENT(d)
<EVV> <V> <_>PAREN(')') -> V
<EV> <V> <_>WS( )
<EV> <V> <_>OPV(*)
<EV> <N> <_>MODIFIER(const)
<EV> <T> <_>WS( )
<EV> <T> <_>IDENT(e)
<EV> <V> <_>PAREN(')') -> V
<E> <V> <_>WS(
)
30 > . static void c(const FIXTURE_VARIANT(d) *const e)
30 > EEVVVVVVVTTTTTVNTTTTTTVVVVVVVVVVVVVVVNVVVNTTTTTTVVV
30 > ________________________________________B_________

Cc: Andy Whitcroft <apw@canonical.com>
Cc: Dwaipayan Ray <dwaipayanray1@gmail.com>
Cc: Joe Perches <joe@perches.com>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Mickaël Salaün <mic@digikod.net>
Link: https://lore.kernel.org/r/20220901145948.1456353-1-mic@digikod.net
---
scripts/checkpatch.pl | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 79e759aac543..016b47c35742 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -576,10 +576,17 @@ our $typeKernelTypedefs = qr{(?x:
(?:__)?(?:u|s|be|le)(?:8|16|32|64)|
atomic_t
)};
+our $typeStdioTypedefs = qr{(?x:
+ FILE
+)};
+# our $typeKselftestHarnessTypedefs = qr{(?x:
+# FIXTURE_(?:DATA|VARIANT)\($Ident\)
+# )};
our $typeTypedefs = qr{(?x:
$typeC99Typedefs\b|
$typeOtherOSTypedefs\b|
- $typeKernelTypedefs\b
+ $typeKernelTypedefs\b|
+ $typeStdioTypedefs\b
)};

our $zero_initializer = qr{(?:(?:0[xX])?0+$Int_type?|NULL|false)\b};
base-commit: b90cb1053190353cc30f0fef0ef1f378ccc063c5
--
2.37.2

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