5.9-stable patches

added patches:
	kbuild-do-not-emit-debug-info-for-assembly-with-llvm_ias-1.patch

diff --git a/queue-5.9/kbuild-do-not-emit-debug-info-for-assembly-with-llvm_ias-1.patch b/queue-5.9/kbuild-do-not-emit-debug-info-for-assembly-with-llvm_ias-1.patch
new file mode 100644 (file)
index 0000000..16c16ee
--- /dev/null
+++ b/queue-5.9/kbuild-do-not-emit-debug-info-for-assembly-with-llvm_ias-1.patch
@@ -0,0 +1,52 @@
+From foo@baz Fri Dec 11 03:24:32 PM CET 2020
+From: Nick Desaulniers <ndesaulniers@google.com>
+Date: Mon, 9 Nov 2020 10:35:28 -0800
+Subject: Kbuild: do not emit debug info for assembly with LLVM_IAS=1
+
+From: Nick Desaulniers <ndesaulniers@google.com>
+
+commit b8a9092330da2030496ff357272f342eb970d51b upstream.
+
+Clang's integrated assembler produces the warning for assembly files:
+
+warning: DWARF2 only supports one section per compilation unit
+
+If -Wa,-gdwarf-* is unspecified, then debug info is not emitted for
+assembly sources (it is still emitted for C sources).  This will be
+re-enabled for newer DWARF versions in a follow up patch.
+
+Enables defconfig+CONFIG_DEBUG_INFO to build cleanly with
+LLVM=1 LLVM_IAS=1 for x86_64 and arm64.
+
+Cc: <stable@vger.kernel.org>
+Link: https://github.com/ClangBuiltLinux/linux/issues/716
+Reported-by: Dmitry Golovin <dima@golovin.in>
+Reported-by: Nathan Chancellor <natechancellor@gmail.com>
+Suggested-by: Dmitry Golovin <dima@golovin.in>
+Suggested-by: Nathan Chancellor <natechancellor@gmail.com>
+Suggested-by: Sedat Dilek <sedat.dilek@gmail.com>
+Reviewed-by: Fangrui Song <maskray@google.com>
+Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
+Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
+Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
+[nd: backport to avoid conflicts from:
+  commit 695afd3d7d58 ("kbuild: Simplify DEBUG_INFO Kconfig handling")]
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ Makefile |    3 +++
+ 1 file changed, 3 insertions(+)
+
+--- a/Makefile
++++ b/Makefile
+@@ -821,8 +821,11 @@ DEBUG_CFLAGS      += -gsplit-dwarf
+ else
+ DEBUG_CFLAGS  += -g
+ endif
++ifneq ($(LLVM_IAS),1)
+ KBUILD_AFLAGS += -Wa,-gdwarf-2
+ endif
++endif
++
+ ifdef CONFIG_DEBUG_INFO_DWARF4
+ DEBUG_CFLAGS  += -gdwarf-4
+ endif