[RFC] Resolving "false positive" error message from checkpatch.pl

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Hi all

There is a "false positive" error reported by checkpatch.pl:

ERROR: Use 4 digit octal (0777) not decimal permissions
#272: FILE: drivers/staging/iio/meter/ade7759.c:272:
+static IIO_DEV_ATTR_CH_OFF(1, S_IWUSR | S_IRUGO,
+		ade7759_read_8bit,
+		ade7759_write_8bit,
+		ADE7759_CH1OS);

ERROR: Use 4 digit octal (0777) not decimal permissions
#276: FILE: drivers/staging/iio/meter/ade7759.c:276:
+static IIO_DEV_ATTR_CH_OFF(2, S_IWUSR | S_IRUGO,
+		ade7759_read_8bit,
+		ade7759_write_8bit,
+		ADE7759_CH2OS);

The same for the file drivers/staging/iio/meter/ade7753.c.

We can see that this macro is matched by the pattern "IIO_DEV_ATTR_[A-Z_]+" from
@mode_permission_funcs in checkpatch.pl.

My question is: how this should be fixed?

>From what I can say, it's a false positive so the correct way to fix it is to
change the matching pattern: "IIO_DEV_ATTR_(?!CH_OFF)[A-Z_]+".

Or maybe the fix should be done in iio code - argument position inside this
macro?

-- 
Slawomir Stepien
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