[PATCH] vmlinux: clang: thinlto: Add --thinlto-jobs=4 to

[Sedat Dilek]

---
scripts/Makefile.vmlinux_o | 2 +-
scripts/link-vmlinux.sh    | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/Makefile.vmlinux_o b/scripts/Makefile.vmlinux_o
index 3c97a1564947..4c1991c91417 100644
--- a/scripts/Makefile.vmlinux_o
+++ b/scripts/Makefile.vmlinux_o
@@ -53,7 +53,7 @@ objtool_args := \

quiet_cmd_ld_vmlinux.o = LD      $@
      cmd_ld_vmlinux.o = \
-       $(LD) ${KBUILD_LDFLAGS} -r -o $@ \
+       $(LD) ${KBUILD_LDFLAGS} --thinlto-jobs=4 -r -o $@ \
       $(addprefix -T , $(initcalls-lds)) \
       --whole-archive $(KBUILD_VMLINUX_OBJS) --no-whole-archive \
       --start-group $(KBUILD_VMLINUX_LIBS) --end-group \
diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index eecc1863e556..1624da57807b 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -83,7 +83,7 @@ vmlinux_link()
       else
               wl=
               ld="${LD}"
-               ldflags="${KBUILD_LDFLAGS} ${LDFLAGS_vmlinux}"
+               ldflags="${KBUILD_LDFLAGS} --thinlto-jobs=4 ${LDFLAGS_vmlinux}"
               ldlibs=
       fi

--
2.36.1

Hmm, not a significant performance gain - not measurable here.

Unsure, if passing --thinlto-jobs=4 to KBUILD_LDFLAGS in top-level
Makefile is too invasive.
( UNTESTED... )

$ cat 0001-clang-thinlto-Add-thinlto-jobs-4-to-KBUILD_LDFLAGS.patch