On Tue, Mar 30, 2021 at 02:12:40AM +0530, Shreeya Patel wrote: > diff --git a/fs/unicode/Kconfig b/fs/unicode/Kconfig > index 2c27b9a5cd6c..ad4b837f2eb2 100644 > --- a/fs/unicode/Kconfig > +++ b/fs/unicode/Kconfig > @@ -2,13 +2,26 @@ > # > # UTF-8 normalization > # > +# CONFIG_UNICODE will be automatically enabled if CONFIG_UNICODE_UTF8 > +# is enabled. This config option adds the unicode subsystem layer which loads > +# the UTF-8 module whenever any filesystem needs it. > config UNICODE > - bool "UTF-8 normalization and casefolding support" > + bool > + > +# utf8data.h_shipped has a large database table which is an auto-generated > +# decodification trie for the unicode normalization functions and it is not > +# necessary to carry this large table in the kernel. > +# Enabling UNICODE_UTF8 option will allow UTF-8 encoding to be built as a > +# module and this module will be loaded by the unicode subsystem layer only > +# when any filesystem needs it. > +config UNICODE_UTF8 > + tristate "UTF-8 module" > help > Say Y here to enable UTF-8 NFD normalization and NFD+CF casefolding > support. > + select UNICODE
This seems problematic; it allows users to set CONFIG_EXT4_FS=y (or CONFIG_F2FS_FS=y) but then CONFIG_UNICODE_UTF8=m. Then the filesystem won't work if the modules are located on the filesystem itself. I think it should work analogously to CONFIG_FS_ENCRYPTION and CONFIG_FS_ENCRYPTION_ALGS. That is, CONFIG_UNICODE should be a user-selectable bool, and then the tristate symbols CONFIG_EXT4_FS and CONFIG_F2FS_FS should select the tristate symbol CONFIG_UNICODE_UTF8 if CONFIG_UNICODE. - Eric
