riscv: patch code by fixmap mapping

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On strict kernel memory permission, the ftrace have to change the
permission of text for dynamic patching the intructions. Use
riscv_patch_text_nosync() to patch code instead of probe_kernel_write.

Signed-off-by: Zong Li <zong.li@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

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Zong Li 2020-03-10 00:55:44 +08:00 • committed by Palmer Dabbelt

parent 043cb41a85

commit 8fdddb2eae

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1 changed files with 4 additions and 9 deletions

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arch/riscv/kernel/ftrace.c

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