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x86: call32: Append appropriate suffixes

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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: 6f92ed8f1a ("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>
This commit is contained in:
Andy Shevchenko
2020-07-28 12:56:26 +03:00
committed by Bin Meng
parent 549c6f47e6
commit 940185910f
1 changed files with 2 additions and 3 deletions
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5
arch/x86/cpu/call32.S
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@@ -32,8 +32,7 @@ cpu_call32:
push %rdi /* 32-bit code segment */ push %rdi /* 32-bit code segment */
lea compat(%rip), %rax lea compat(%rip), %rax
push %rax push %rax
.byte 0x48 /* REX prefix to force 64-bit far return */ retfq
retf
.code32 .code32
compat: compat:
/* /*
@@ -60,4 +59,4 @@ compat:
/* Jump to the required target */ /* Jump to the required target */
pushl %edi /* 32-bit code segment */ pushl %edi /* 32-bit code segment */
pushl %esi /* 32-bit target address */ pushl %esi /* 32-bit target address */
retf retfl