[PATCH AUTOSEL 5.7 35/40] x86: math-emu: Fix up 'cmp' insn for clang ias

From: Sasha Levin
Date: Mon Jul 20 2020 - 17:44:33 EST


From: Arnd Bergmann <arnd@xxxxxxxx>

[ Upstream commit 81e96851ea32deb2c921c870eecabf335f598aeb ]

The clang integrated assembler requires the 'cmp' instruction to
have a length prefix here:

arch/x86/math-emu/wm_sqrt.S:212:2: error: ambiguous instructions require an explicit suffix (could be 'cmpb', 'cmpw', or 'cmpl')
cmp $0xffffffff,-24(%ebp)
^

Make this a 32-bit comparison, which it was clearly meant to be.

Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Reviewed-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Link: https://lkml.kernel.org/r/20200527135352.1198078-1-arnd@xxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
arch/x86/math-emu/wm_sqrt.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/math-emu/wm_sqrt.S b/arch/x86/math-emu/wm_sqrt.S
index 3b2b58164ec18..40526dd85137b 100644
--- a/arch/x86/math-emu/wm_sqrt.S
+++ b/arch/x86/math-emu/wm_sqrt.S
@@ -209,7 +209,7 @@ sqrt_stage_2_finish:

#ifdef PARANOID
/* It should be possible to get here only if the arg is ffff....ffff */
- cmp $0xffffffff,FPU_fsqrt_arg_1
+ cmpl $0xffffffff,FPU_fsqrt_arg_1
jnz sqrt_stage_2_error
#endif /* PARANOID */

--
2.25.1