From: Jan Beulich <jbeulich@xxxxxxxx> commit b2b1d94cdfd4e906d3936dab2850096a4a0c2017 upstream. ignore_sysret() contains an unsuffixed SYSRET instruction. gas correctly interprets this as SYSRETL, but leaving it up to gas to guess when there is no register operand that implies a size is bad practice, and upstream gas is likely to warn about this in the future. Use SYSRETL explicitly. This does not change the assembled output. Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx> Signed-off-by: Borislav Petkov <bp@xxxxxxx> Acked-by: Andy Lutomirski <luto@xxxxxxxxxx> Link: https://lkml.kernel.org/r/038a7c35-062b-a285-c6d2-653b56585844@xxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/x86/entry/entry_64.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -1759,7 +1759,7 @@ END(nmi) ENTRY(ignore_sysret) UNWIND_HINT_EMPTY mov $-ENOSYS, %eax - sysret + sysretl END(ignore_sysret) ENTRY(rewind_stack_do_exit)
