[tip: x86/urgent] x86: math-emu: Fix up 'cmp' insn for clang ias

[tip-bot2 for Arnd Bergmann]

The following commit has been merged into the x86/urgent branch of tip:

Commit-ID:     81e96851ea32deb2c921c870eecabf335f598aeb
Gitweb:        https://git.kernel.org/tip/81e96851ea32deb2c921c870eecabf335f598aeb
Author:        Arnd Bergmann <arnd@xxxxxxxx>
AuthorDate:    Wed, 27 May 2020 15:53:46 +02:00
Committer:     Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Thu, 16 Jul 2020 17:26:42 +02:00

x86: math-emu: Fix up 'cmp' insn for clang ias

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

---
 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 3b2b581..40526dd 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 */