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Diffstat (limited to 'arch/powerpc/lib/code-patching.c')
-rw-r--r--arch/powerpc/lib/code-patching.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/powerpc/lib/code-patching.c b/arch/powerpc/lib/code-patching.c
index 1ecd166091c9..be670e1abafa 100644
--- a/arch/powerpc/lib/code-patching.c
+++ b/arch/powerpc/lib/code-patching.c
@@ -79,6 +79,8 @@ static int text_area_cpu_down(unsigned int cpu)
return 0;
}
+static __ro_after_init DEFINE_STATIC_KEY_FALSE(poking_init_done);
+
/*
* Although BUG_ON() is rude, in this case it should only happen if ENOMEM, and
* we judge it as being preferable to a kernel that will crash later when
@@ -89,6 +91,7 @@ void __init poking_init(void)
BUG_ON(!cpuhp_setup_state(CPUHP_AP_ONLINE_DYN,
"powerpc/text_poke:online", text_area_cpu_up,
text_area_cpu_down));
+ static_branch_enable(&poking_init_done);
}
/*
@@ -171,7 +174,7 @@ static int do_patch_instruction(u32 *addr, ppc_inst_t instr)
* when text_poke_area is not ready, but we still need
* to allow patching. We just do the plain old patching
*/
- if (!this_cpu_read(text_poke_area))
+ if (!static_branch_likely(&poking_init_done))
return raw_patch_instruction(addr, instr);
local_irq_save(flags);