x86: call32: Append appropriate suffixes
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>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/cpu/call32.S b/arch/x86/cpu/call32.S
index e185b9a..e641e78 100644
--- a/arch/x86/cpu/call32.S
+++ b/arch/x86/cpu/call32.S
@@ -32,8 +32,7 @@
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 @@
/* Jump to the required target */
pushl %edi /* 32-bit code segment */
pushl %esi /* 32-bit target address */
- retf
+ retfl