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UBUNTU: SAUCE: fix FTBFS in machine_real_restart()

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(focal-amd64)ppisati@kathleen:~/linux$ make -j128
  DESCEND  objtool
  CALL    scripts/atomic/check-atomics.sh
  CALL    scripts/checksyscalls.sh
  CHK     include/generated/compile.h
  CC      arch/x86/kernel/reboot.o
  CHK     kernel/kheaders_data.tar.xz
arch/x86/kernel/reboot.o: warning: objtool: machine_real_restart()+0x63: retpoline_safe hint not an indirect jump/call
make[2]: *** [scripts/Makefile.build:275: arch/x86/kernel/reboot.o] Error 255
make[2]: *** Deleting file 'arch/x86/kernel/reboot.o'
make[1]: *** [scripts/Makefile.build:496: arch/x86/kernel] Error 2
make: *** [Makefile:1734: arch/x86] Error 2
make: *** Waiting for unfinished jobs....

Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>
This commit is contained in:
Paolo Pisati
2020-04-22 14:09:47 +00:00
parent 67128b5b2b
commit 0b66f3a3ed
1 changed files with 2 additions and 2 deletions
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arch/x86/kernel/reboot.c
+2 -2
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@@ -119,11 +119,11 @@ void __noreturn machine_real_restart(unsigned int type)
/* Jump to the identity-mapped low memory code */
#ifdef CONFIG_X86_32
asm volatile(ANNOTATE_RETPOLINE_SAFE "jmpl *%0" : :
asm volatile("jmpl *%0" : :
"rm" (real_mode_header->machine_real_restart_asm),
"a" (type));
#else
asm volatile(ANNOTATE_RETPOLINE_SAFE "ljmpl *%0" : :
asm volatile("ljmpl *%0" : :
"m" (real_mode_header->machine_real_restart_asm),
"D" (type));
#endif