linux-kernel - [PATCH] kbuild: avoid long argument lists in make modules

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Date:   Mon, 11 Sep 2023 10:01:29 +0200 (CEST)
From:   Michal Kubecek <mkubecek@...e.cz>
To:     Masahiro Yamada <masahiroy@...nel.org>,
        linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] kbuild: avoid long argument lists in make modules_install

Running "make modules_install" may fail with

  make[2]: execvp: /bin/sh: Argument list too long

if many modules are built and INSTALL_MOD_PATH is long. This is because
scripts/Makefile.modinst creates all directories with one mkdir command.
Use $(foreach ...) instead to prevent an excessive argument list.

Fixes: 2dfec887c0fd ("kbuild: reduce the number of mkdir calls during modules_install")
Signed-off-by: Michal Kubecek <mkubecek@...e.cz>
---
 scripts/Makefile.modinst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/Makefile.modinst b/scripts/Makefile.modinst
index c59cc57286ba..346f5ec50682 100644
--- a/scripts/Makefile.modinst
+++ b/scripts/Makefile.modinst
@@ -113,7 +113,7 @@ quiet_cmd_sign :=
 endif
 
 # Create necessary directories
-$(shell mkdir -p $(sort $(dir $(install-y))))
+$(foreach dir, $(sort $(dir $(install-y))), $(shell mkdir -p $(dir)))
 
 $(dst)/%.ko: $(extmod_prefix)%.ko FORCE
 	$(call cmd,install)
-- 
2.42.0