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-rw-r--r--arch/riscv/kernel/sys_riscv.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/arch/riscv/kernel/sys_riscv.c b/arch/riscv/kernel/sys_riscv.c
index f7181ed8aafc..568026ccf6e8 100644
--- a/arch/riscv/kernel/sys_riscv.c
+++ b/arch/riscv/kernel/sys_riscv.c
@@ -48,7 +48,6 @@ SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
}
#endif /* !CONFIG_64BIT */
-#ifdef CONFIG_SMP
/*
* Allows the instruction cache to be flushed from userspace. Despite RISC-V
* having a direct 'fence.i' instruction available to userspace (which we
@@ -66,15 +65,24 @@ SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
SYSCALL_DEFINE3(riscv_flush_icache, uintptr_t, start, uintptr_t, end,
uintptr_t, flags)
{
+#ifdef CONFIG_SMP
struct mm_struct *mm = current->mm;
bool local = (flags & SYS_RISCV_FLUSH_ICACHE_LOCAL) != 0;
+#endif
/* Check the reserved flags. */
if (unlikely(flags & ~SYS_RISCV_FLUSH_ICACHE_ALL))
return -EINVAL;
+ /*
+ * Without CONFIG_SMP flush_icache_mm is a just a flush_icache_all(),
+ * which generates unused variable warnings all over this function.
+ */
+#ifdef CONFIG_SMP
flush_icache_mm(mm, local);
+#else
+ flush_icache_all();
+#endif
return 0;
}
-#endif