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* + makefile-drop-warn-stack-size-plugin-opt.patch added to mm-nonmm-unstable branch
@ 2024-01-26  2:14 Andrew Morton
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From: Andrew Morton @ 2024-01-26  2:14 UTC (permalink / raw)
  To: mm-commits, will, tglx, paul.walmsley, palmer, npiggin, nicolas,
	naveen.n.rao, mpe, mingo, masahiroy, mark.rutland, linux,
	keescook, dave.hansen, conor, catalin.marinas, bp, ardb, aou,
	aneesh.kumar, nathan, akpm

The patch titled
     Subject: Makefile: drop warn-stack-size plugin opt
has been added to the -mm mm-nonmm-unstable branch.  Its filename is

This patch will shortly appear at

This patch will later appear in the mm-nonmm-unstable branch at

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From: Nathan Chancellor <>
Subject: Makefile: drop warn-stack-size plugin opt
Date: Thu, 25 Jan 2024 15:55:08 -0700

Now that the minimum supported version of LLVM for building the kernel has
been bumped to 13.0.1, the inner ifeq statement is always false, as the
build will fail during the configuration stage for older LLVM versions.

This effectively reverts commit 24845dcb170e ("Makefile: LTO: have linker
check -Wframe-larger-than") and its follow up fix, commit 0236526d76b8
("Makefile: lto: Pass -warn-stack-size only on LLD < 13.0.0").

Signed-off-by: Nathan Chancellor <>
Reviewed-by: Kees Cook <>
Cc: Albert Ou <>
Cc: "Aneesh Kumar K.V (IBM)" <>
Cc: Ard Biesheuvel <>
Cc: Borislav Petkov (AMD) <>
Cc: Catalin Marinas <>
Cc: Conor Dooley <>
Cc: Dave Hansen <>
Cc: Ingo Molnar <>
Cc: Mark Rutland <>
Cc: Masahiro Yamada <>
Cc: Michael Ellerman <>
Cc: "Naveen N. Rao" <>
Cc: Nicholas Piggin <>
Cc: Nicolas Schier <>
Cc: Palmer Dabbelt <>
Cc: Paul Walmsley <>
Cc: Russell King <>
Cc: Thomas Gleixner <>
Cc: Will Deacon <>
Signed-off-by: Andrew Morton <>

 Makefile |    8 --------
 1 file changed, 8 deletions(-)

--- a/Makefile~makefile-drop-warn-stack-size-plugin-opt
+++ a/Makefile
@@ -951,14 +951,6 @@ CC_FLAGS_LTO	+= -fvisibility=hidden
 # Limit inlining across translation units to reduce binary size
 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5
-# Check for frame size exceeding threshold during prolog/epilog insertion
-# when using lld < 13.0.0.
-ifneq ($(CONFIG_FRAME_WARN),0)
-ifeq ($(call test-lt, $(CONFIG_LLD_VERSION), 130000),y)
-KBUILD_LDFLAGS	+= -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN)

Patches currently in -mm which might be from are


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2024-01-26  2:14 + makefile-drop-warn-stack-size-plugin-opt.patch added to mm-nonmm-unstable branch Andrew Morton

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