[PATCH -next] kbuild: explicitly run mksysmap as sed script from link-vmlinux.sh

[Richard Acayan <mailingradian@gmail.com>]

In commit b18b047002b7 ("kbuild: change scripts/mksysmap into sed
script"), the mksysmap script was transformed into a sed script,
made directly executable with "#!/bin/sed -f". Apparently, the path to
sed is different on NixOS, fixed by using the env command.

To accommodate the number of arguments above the normal maximum for
hashbangs, the -S flag of env was used (as in
"#!/usr/bin/env -S sed -f"). However, env -S is a GNU extension.
Explicitly use sed instead of relying on the executable shebang to keep
compatibility with build environments using Busybox.

Fixes: 973eca8db557 ("kbuild: mksysmap now works on nixos")
Signed-off-by: Richard Acayan <mailingradian@gmail.com>
---
 scripts/link-vmlinux.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index 46ce5d04dbeb..518c70b8db50 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -193,7 +193,7 @@ kallsyms_step()
 mksysmap()
 {
 	info NM ${2}
-	${NM} -n "${1}" | "${srctree}/scripts/mksysmap" > "${2}"
+	${NM} -n "${1}" | sed -f "${srctree}/scripts/mksysmap" > "${2}"
 }
 
 sorttable()
-- 
2.45.2