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This reverts commit 5c26d2f1d3f5e4be3e196526bead29ecb139cf91.
It turns out that we can't do this, because while the old behavior of
ignoring ignorable code points was most definitely wrong, we have
case-folding filesystems with on-disk hash values with that wrong
behavior.
So now you can't look up those names, because they hash to something
different.
Of course, it's also entirely possible that in the meantime people have
created *new* files with the new ("more correct") case folding logic,
and reverting will just make other things break.
The correct solution is to not do case folding in filesystems, but
sadly, people seem to never really understand that. People still see it
as a feature, not a bug.
Reported-by: Qi Han <hanqi@vivo.com>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=219586
Cc: Gabriel Krisman Bertazi <krisman@suse.de>
Requested-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/krisman/unicode
Pull unicode updates from Gabriel Krisman Bertazi:
- constify a read-only struct (Thomas Weißschuh)
- fix the error path of unicode_load, avoiding a possible kernel oops
if it fails to find the unicode module (André Almeida)
- documentation fix, updating a filename in the README (Gan Jie)
- add the link of my tree to MAINTAINERS (André Almeida)
* tag 'unicode-next-6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/krisman/unicode:
MAINTAINERS: Add Unicode tree
unicode: change the reference of database file
unicode: Fix utf8_load() error path
unicode: constify utf8 data table
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We don't need to handle them separately. Instead, just let them
decompose/casefold to themselves.
Signed-off-by: Gabriel Krisman Bertazi <krisman@suse.de>
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All users already handle the table as const data.
Move the table itself into .rodata to guard against accidental or
malicious modifications.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20240809-unicode-const-v1-1-69968a258092@weissschuh.net
Signed-off-by: Gabriel Krisman Bertazi <krisman@suse.de>
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Currently 'make W=1' reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/unicode/utf8data.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/unicode/utf8-selftest.o
Add a MODULE_DESCRIPTION() to utf8-selftest.c and utf8data.c_shipped,
and update mkutf8data.c to add a MODULE_DESCRIPTION() to any future
generated utf8data file.
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Link: https://lore.kernel.org/r/20240524-md-unicode-v1-1-e2727ce8574d@quicinc.com
Signed-off-by: Gabriel Krisman Bertazi <krisman@suse.de>
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utf8data.h contains a large database table which is an auto-generated
decodification trie for the unicode normalization functions.
Allow building it into a separate module.
Based on a patch from Shreeya Patel <shreeya.patel@collabora.com>.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
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