arch: select HAVE_ARCH_BITREVERSE conditionally on BITREVERSE

Architectures may have bit reversal instructions, but if the API not
needed, the corresponding option should not be selected because it may
lead to generating the unneeded code.

Signed-off-by: Yury Norov <ynorov@nvidia.com>

arch/arm/Kconfig

@@ -83,7 +83,7 @@ config ARM
 	select HARDIRQS_SW_RESEND
 	select HAS_IOPORT
 	select HAVE_ARCH_AUDITSYSCALL if AEABI && !OABI_COMPAT
-	select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6
+	select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6 && BITREVERSE
 	select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL && !CPU_ENDIAN_BE32 && MMU && (!PREEMPT_RT || !SMP)
 	select HAVE_ARCH_KFENCE if MMU && !XIP_KERNEL
 	select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32 && MMU

arch/arm64/Kconfig

@@ -150,7 +150,7 @@ config ARM64
 	select HAVE_ACPI_APEI if (ACPI && EFI)
 	select HAVE_ALIGNED_STRUCT_PAGE
 	select HAVE_ARCH_AUDITSYSCALL
-	select HAVE_ARCH_BITREVERSE
+	select HAVE_ARCH_BITREVERSE if BITREVERSE
 	select HAVE_ARCH_COMPILER_H
 	select HAVE_ARCH_HUGE_VMALLOC
 	select HAVE_ARCH_HUGE_VMAP

arch/loongarch/Kconfig

@@ -115,7 +115,7 @@ config LOONGARCH
 	select HAS_IOPORT
 	select HAVE_ALIGNED_STRUCT_PAGE if 64BIT
 	select HAVE_ARCH_AUDITSYSCALL
-	select HAVE_ARCH_BITREVERSE if 64BIT
+	select HAVE_ARCH_BITREVERSE if 64BIT && BITREVERSE
 	select HAVE_ARCH_JUMP_LABEL
 	select HAVE_ARCH_JUMP_LABEL_RELATIVE
 	select HAVE_ARCH_KASAN if 64BIT

arch/mips/Kconfig

@@ -2026,7 +2026,7 @@ config CPU_MIPSR6
 	default y if CPU_MIPS32_R6 || CPU_MIPS64_R6
 	select CPU_HAS_RIXI
 	select CPU_HAS_DIEI if !CPU_DIEI_BROKEN
-	select HAVE_ARCH_BITREVERSE
+	select HAVE_ARCH_BITREVERSE if BITREVERSE
 	select MIPS_ASID_BITS_VARIABLE
 	select MIPS_SPRAM
 

lib/Kconfig

@@ -58,6 +58,7 @@ config BITREVERSE
 config HAVE_ARCH_BITREVERSE
 	bool
 	default n
+	depends on BITREVERSE
 	help
 	  This option enables the use of hardware bit-reversal instructions on
 	  architectures which support such operations.