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-rw-r--r--src/soc/amd/stoneyridge/Makefile.inc2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/soc/amd/stoneyridge/Makefile.inc b/src/soc/amd/stoneyridge/Makefile.inc
index 969f5129eb..2ad07306b3 100644
--- a/src/soc/amd/stoneyridge/Makefile.inc
+++ b/src/soc/amd/stoneyridge/Makefile.inc
@@ -172,7 +172,7 @@ STONEYRIDGE_FWM_ROM_POSITION=$(call int-add, \
add_amdfw: $(obj)/coreboot.pre $(obj)/amdfw.rom
printf " DD Adding AMD Firmware at ROM offset 0x%x\n" \
"$(STONEYRIDGE_FWM_ROM_POSITION)"
- dd if=$(obj)/amdfw.rom \
+ flock $< dd if=$(obj)/amdfw.rom \
of=$(obj)/coreboot.pre conv=notrunc bs=1 \
seek=$(STONEYRIDGE_FWM_ROM_POSITION) >/dev/null 2>&1