riscv: select ARCH_HAS_STRICT_KERNEL_RWX only if MMU

ARCH_HAS_STRICT_KERNEL_RWX is not useful for NO-MMU systems.
Furthermore, has this option leads to very large boot image files on
64bits architectures, do not enable this option to allow supporting
no-mmu platforms such as the Kendryte K210 SoC based boards.

Fixes: 00cb41d ("riscv: add alignment for text, rodata and data sections")
Signed-off-by: Damien Le Moal <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
Reviewed-by: Wladimir J. van der Laan <[email protected]>
Signed-off-by: Palmer Dabbelt <[email protected]>

Author: damien-lemoal

arch/riscv/Kconfig

@@ -60,7 +60,7 @@ config RISCV
 	select ARCH_HAS_GIGANTIC_PAGE
 	select ARCH_HAS_SET_DIRECT_MAP
 	select ARCH_HAS_SET_MEMORY
-	select ARCH_HAS_STRICT_KERNEL_RWX
+	select ARCH_HAS_STRICT_KERNEL_RWX if MMU
 	select ARCH_WANT_HUGE_PMD_SHARE if 64BIT
 	select SPARSEMEM_STATIC if 32BIT
 	select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT if MMU