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riscv: Fix set_direct_map_default_noflush() to reset _PAGE_EXEC
When resetting the linear mapping permissions, we must make sure that we clear the X bit so that do not end up with WX mappings (since we set PAGE_KERNEL). Fixes: 395a21f ("riscv: add ARCH_HAS_SET_DIRECT_MAP support") Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com> Link: https://lore.kernel.org/r/20231213134027.155327-3-alexghiti@rivosinc.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
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