[PATCH AUTOSEL 4.19 30/60] s390/boot: disable address-of-packed-member warning

[Sasha Levin]

From: Heiko Carstens <heiko.carstens@xxxxxxxxxx>

[ Upstream commit f9364df30420987e77599c4789ec0065c609a507 ]

Get rid of gcc9 warnings like this:

arch/s390/boot/ipl_report.c: In function 'find_bootdata_space':
arch/s390/boot/ipl_report.c:42:26: warning: taking address of packed member of 'struct ipl_rb_components' may result in an unaligned pointer value [-Waddress-of-packed-member]
   42 |  for_each_rb_entry(comp, comps)
      |                          ^~~~~

This is effectively the s390 variant of commit 20c6c1890455
("x86/boot: Disable the address-of-packed-member compiler warning").

Reviewed-by: Vasily Gorbik <gor@xxxxxxxxxxxxx>
Signed-off-by: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 arch/s390/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index ee65185bbc80..e6c2e8925fef 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -24,6 +24,7 @@ KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY
 KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float
 KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables
 KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-option,-ffreestanding)
+KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, address-of-packed-member)
 KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g)
 KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,))
 UTS_MACHINE	:= s390x
-- 
2.20.1