[XEN][PATCH 8/8] xen/arm64: constify regs_mode_is_32bit macro for CONFIG_ARM64_AARCH32=n

[Grygorii Strashko <grygorii_strashko@epam.com>]

From: Grygorii Strashko <grygorii_strashko@epam.com>

Constify regs_mode_is_32bit() macro for the case CONFIG_ARM64_AARCH32=n  and
so allow compiler to opt out Aarch32 specific code.

(CONFIG_ARM64_AARCH32=y)
Before:
 855232	 322404	 270880	1448516	 161a44	xen-syms

(CONFIG_ARM64_AARCH32=n, CONFIG_EXPERT=y)
After:
 849548	 322404	 270880	1442832	 160410	xen-syms
diff: -5684 (dec)

Signed-off-by: Grygorii Strashko <grygorii_strashko@epam.com>
---
 xen/arch/arm/include/asm/arm64/processor.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/xen/arch/arm/include/asm/arm64/processor.h b/xen/arch/arm/include/asm/arm64/processor.h
index daf890708d87..a3d83869f02d 100644
--- a/xen/arch/arm/include/asm/arm64/processor.h
+++ b/xen/arch/arm/include/asm/arm64/processor.h
@@ -96,10 +96,14 @@ struct cpu_user_regs
  */
 #define regs_mode_is_user(r) (psr_mode((r)->cpsr, PSR_MODE_EL0t) || usr_mode(r))
 
+#if defined(CONFIG_ARM64_AARCH32)
 static inline bool regs_mode_is_32bit(const struct cpu_user_regs *regs)
 {
     return !!(regs->cpsr & PSR_MODE_BIT);
 }
+#else
+#define regs_mode_is_32bit(regs) (false)
+#endif /* CONFIG_ARM64_AARCH32 */
 
 #endif /* __ASSEMBLY__ */
 
-- 
2.34.1