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Makefile.debug: re-enable debug info for .S files

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This is _not_ an upstream commit and just for 5.10.y only. It is based
on commit 32ef9e5054 upstream.

Alexey reported that the fraction of unknown filename instances in
kallsyms grew from ~0.3% to ~10% recently; Bill and Greg tracked it down
to assembler defined symbols, which regressed as a result of:

commit b8a9092330 ("Kbuild: do not emit debug info for assembly with LLVM_IAS=1")

In that commit, I allude to restoring debug info for assembler defined
symbols in a follow up patch, but it seems I forgot to do so in

commit a66049e2cf ("Kbuild: make DWARF version a choice")

Fixes: b8a9092330 ("Kbuild: do not emit debug info for assembly with LLVM_IAS=1")
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Nick Desaulniers
2022-10-24 13:34:14 -07:00
committed by Greg Kroah-Hartman
parent 6ab2287b26
commit 3a260e9844
1 changed files with 3 additions and 1 deletions
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4
Makefile
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@@ -842,7 +842,9 @@ else
DEBUG_CFLAGS += -g
endif
ifneq ($(LLVM_IAS),1)
ifeq ($(LLVM_IAS),1)
KBUILD_AFLAGS += -g
else
KBUILD_AFLAGS += -Wa,-gdwarf-2
endif