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Date:   Sun, 31 May 2020 15:27:48 +0530
From:   Anup Patel <>
To:     Palmer Dabbelt <>,
        Paul Walmsley <>,
        Albert Ou <>
Cc:     Atish Patra <>,
        Alistair Francis <>,
        Anup Patel <>,,,
        Anup Patel <>,
Subject: [PATCH] RISC-V: Don't mark init section as non-executable

The head text section (i.e. _start, secondary_start_sbi, etc) and the
init section fall under same page table level-1 mapping.

Currently, the runtime CPU hotplug is broken because we are marking
init section as non-executable which in-turn marks head text section
as non-executable.

Further investigating other architectures, it seems marking the init
section as non-executable is redundant because the init section pages
are anyway poisoned and freed.

To fix broken runtime CPU hotplug, we simply remove the code marking
the init section as non-executable.

Fixes: d27c3c90817e ("riscv: add STRICT_KERNEL_RWX support")
Signed-off-by: Anup Patel <>
 arch/riscv/mm/init.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index 736de6c8739f..e0f8ccab8a41 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -482,11 +482,6 @@ static void __init setup_vm_final(void)
 void free_initmem(void)
-	unsigned long init_begin = (unsigned long)__init_begin;
-	unsigned long init_end = (unsigned long)__init_end;
-	/* Make the region as non-execuatble. */
-	set_memory_nx(init_begin, (init_end - init_begin) >> PAGE_SHIFT);

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