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riscv: Constify sbi_ipi_ops

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Constify the sbi_ipi_ops so that it will be placed in the .rodata
section. This will cause attempts to modify it to fail when strict
page permissions are in place.

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
This commit is contained in:
Jisheng Zhang 2021-03-30 02:23:54 +08:00 committed by Palmer Dabbelt
parent e6a302248c
commit 300f62c37d
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GPG key ID: 2E1319F35FBB1889
3 changed files with 5 additions and 5 deletions
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4
arch/riscv/include/asm/smp.h
View file

@ -46,7 +46,7 @@ int riscv_hartid_to_cpuid(int hartid);
void riscv_cpuid_to_hartid_mask(const struct cpumask *in, struct cpumask *out);
/* Set custom IPI operations */
void riscv_set_ipi_ops(struct riscv_ipi_ops *ops);
void riscv_set_ipi_ops(const struct riscv_ipi_ops *ops);
/* Clear IPI for current CPU */
void riscv_clear_ipi(void);
@ -92,7 +92,7 @@ static inline void riscv_cpuid_to_hartid_mask(const struct cpumask *in,
cpumask_set_cpu(boot_cpu_hartid, out);
}
static inline void riscv_set_ipi_ops(struct riscv_ipi_ops *ops)
static inline void riscv_set_ipi_ops(const struct riscv_ipi_ops *ops)
{
}

2
arch/riscv/kernel/sbi.c
View file

@ -571,7 +571,7 @@ static void sbi_send_cpumask_ipi(const struct cpumask *target)
sbi_send_ipi(cpumask_bits(&hartid_mask));
}
static struct riscv_ipi_ops sbi_ipi_ops = {
static const struct riscv_ipi_ops sbi_ipi_ops = {
.ipi_inject = sbi_send_cpumask_ipi
};

4
arch/riscv/kernel/smp.c
View file

@ -87,9 +87,9 @@ static void ipi_stop(void)
wait_for_interrupt();
}
static struct riscv_ipi_ops *ipi_ops __ro_after_init;
static const struct riscv_ipi_ops *ipi_ops __ro_after_init;
void riscv_set_ipi_ops(struct riscv_ipi_ops *ops)
void riscv_set_ipi_ops(const struct riscv_ipi_ops *ops)
{
ipi_ops = ops;
}