+ checkpatch-skip-camelcase-cache-for-no-tree-without-root.patch added to mm-nonmm-unstable branch

The patch titled
     Subject: checkpatch: skip CamelCase cache for --no-tree without root
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     checkpatch-skip-camelcase-cache-for-no-tree-without-root.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/checkpatch-skip-camelcase-cache-for-no-tree-without-root.patch

This patch will later appear in the mm-nonmm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Petr Vorel <[email protected]>
Subject: checkpatch: skip CamelCase cache for --no-tree without root
Date: Mon, 10 Aug 2026 18:11:59 +0200

Running outside tree (--no-tree) without git root (--root DIR) is not
doable because we have no include/ directory which could be cached.  But
3445686af721 expected that we are always in Linux tree (w/a git).  But
--no-tree does not require --root.  Therefore skip whole caching in that
case.

This fixes perl and find errors when running checkpatch.pl *with*
--no-tree --strict and *without* --root:

    No structs that should be const will be found - file 'scripts/const_structs.checkpatch': No such file or directory
    Use of uninitialized value $root in concatenation (.) or string at scripts/checkpatch.pl line 1213.
    find: `/include': No such file or directory

Link: https://lore.kernel.org/[email protected]
Fixes: 3445686af721 ("checkpatch: ignore existing CamelCase uses from include/...")
Signed-off-by: Petr Vorel <[email protected]>
Cc: Andy Whitcroft <[email protected]>
Cc: Dwaipayan Ray <[email protected]>
Cc: Joe Perches <[email protected]>
Cc: Lukas Bulwahn <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---

 scripts/checkpatch.pl |    2 ++
 1 file changed, 2 insertions(+)

--- a/scripts/checkpatch.pl~checkpatch-skip-camelcase-cache-for-no-tree-without-root
+++ a/scripts/checkpatch.pl
@@ -1206,6 +1206,8 @@ sub seed_camelcase_includes {
 		my $git_last_include_commit = `${git_command} log --no-merges --pretty=format:"%h%n" -1 -- include`;
 		chomp $git_last_include_commit;
 		$camelcase_cache = ".checkpatch-camelcase.git.$git_last_include_commit";
+	} elsif (not defined $root) {
+		return;
 	} else {
 		my $last_mod_date = 0;
 		$files = `find $root/include -name "*.h"`;
_

Patches currently in -mm which might be from [email protected] are

maintainers-add-irc-and-patchwork-for-ltp.patch
checkpatch-skip-camelcase-cache-for-no-tree-without-root.patch