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>

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 71fc5dd4123f3c0eb0bd397cfbb4ed7474de6976..0e963e54fe06b1da60b75c03caf05a07664c0744 100644 (file)
--- a/arch/arm/Kconfig
+++ b/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

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index fe60738e5943ba279e5571862423df4fed3db661..f5bb62c2ba9c50c0dd5ddc1292f267654943e8b8 100644 (file)
--- a/arch/arm64/Kconfig
+++ b/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

diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
index 606597da46b8df3407bbd60d73f1df44f19bdd40..d6e1c8a734afc5b853ecec98b3beae16f6863445 100644 (file)
--- a/arch/loongarch/Kconfig
+++ b/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

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 4364f3dba688fed141ccb463247075bf6a547cbc..7e1494e0dbfa4620e2b63188af95920d3a1edfe4 100644 (file)
--- a/arch/mips/Kconfig
+++ b/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
 

diff --git a/lib/Kconfig b/lib/Kconfig
index 00a9509636c18736f6468bc754c126d2de1927b6..d8e7e89ae32059b790120ff0d6816e58def8c2b3 100644 (file)
--- a/lib/Kconfig
+++ b/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.