Assembler is not happy:
arch/x86/cpu/call32.S: Assembler messages: arch/x86/cpu/call32.S:36: Warning: no instruction mnemonic suffix given and no register operands; using default for `retf'
Fix this by adding appropriate suffixes to the assembler commands.
Fixes: 6f92ed8f1abf ("x86: Add a way to call 32-bit code from 64-bit mode") Signed-off-by: Andy Shevchenko andriy.shevchenko@linux.intel.com --- arch/x86/cpu/call32.S | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/arch/x86/cpu/call32.S b/arch/x86/cpu/call32.S index e185b9a42b03..e641e781c04c 100644 --- a/arch/x86/cpu/call32.S +++ b/arch/x86/cpu/call32.S @@ -32,8 +32,7 @@ cpu_call32: push %rdi /* 32-bit code segment */ lea compat(%rip), %rax push %rax - .byte 0x48 /* REX prefix to force 64-bit far return */ - retf + retfq .code32 compat: /* @@ -60,4 +59,4 @@ compat: /* Jump to the required target */ pushl %edi /* 32-bit code segment */ pushl %esi /* 32-bit target address */ - retf + retfl