x86/mce/amd: Remove return value for mce_threshold_{create,remove}_device()

The return values are not checked, so set return type to 'void'.

Also, move function declarations to internal.h, since these functions are
only used within the MCE subsystem.

Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Nikolay Borisov <nik.borisov@suse.com>
Link: https://lore.kernel.org/20250624-wip-mca-updates-v4-6-236dd74f645f@amd.com

2 files changed, 14 insertions, 12 deletions

diff --git a/arch/x86/kernel/cpu/mce/amd.c b/arch/x86/kernel/cpu/mce/amd.c
index 9b980aecb6b3..f429451cafc8 100644
--- a/arch/x86/kernel/cpu/mce/amd.c
+++ b/arch/x86/kernel/cpu/mce/amd.c
@@ -1296,12 +1296,12 @@ static void __threshold_remove_device(struct threshold_bank **bp)
 	kfree(bp);
 }
 
-int mce_threshold_remove_device(unsigned int cpu)
+void mce_threshold_remove_device(unsigned int cpu)
 {
 	struct threshold_bank **bp = this_cpu_read(threshold_banks);
 
 	if (!bp)
-		return 0;
+		return;
 
 	/*
 	 * Clear the pointer before cleaning up, so that the interrupt won't
@@ -1310,7 +1310,7 @@ int mce_threshold_remove_device(unsigned int cpu)
 	this_cpu_write(threshold_banks, NULL);
 
 	__threshold_remove_device(bp);
-	return 0;
+	return;
 }
 
 /**
@@ -1324,36 +1324,34 @@ int mce_threshold_remove_device(unsigned int cpu)
  * thread running on @cpu.  The callback is invoked on all CPUs which are
  * online when the callback is installed or during a real hotplug event.
  */
-int mce_threshold_create_device(unsigned int cpu)
+void mce_threshold_create_device(unsigned int cpu)
 {
 	unsigned int numbanks, bank;
 	struct threshold_bank **bp;
-	int err;
 
 	if (!mce_flags.amd_threshold)
-		return 0;
+		return;
 
 	bp = this_cpu_read(threshold_banks);
 	if (bp)
-		return 0;
+		return;
 
 	numbanks = this_cpu_read(mce_num_banks);
 	bp = kcalloc(numbanks, sizeof(*bp), GFP_KERNEL);
 	if (!bp)
-		return -ENOMEM;
+		return;
 
 	for (bank = 0; bank < numbanks; ++bank) {
 		if (!(this_cpu_read(bank_map) & BIT_ULL(bank)))
 			continue;
-		err = threshold_create_bank(bp, cpu, bank);
-		if (err) {
+		if (threshold_create_bank(bp, cpu, bank)) {
 			__threshold_remove_device(bp);
-			return err;
+			return;
 		}
 	}
 	this_cpu_write(threshold_banks, bp);
 
 	if (thresholding_irq_en)
 		mce_threshold_vector = amd_threshold_interrupt;
-	return 0;
+	return;
 }
diff --git a/arch/x86/kernel/cpu/mce/internal.h b/arch/x86/kernel/cpu/mce/internal.h
index b5ba598e54cb..64ac25b95360 100644
--- a/arch/x86/kernel/cpu/mce/internal.h
+++ b/arch/x86/kernel/cpu/mce/internal.h
@@ -265,6 +265,8 @@ void mce_prep_record_common(struct mce *m);
 void mce_prep_record_per_cpu(unsigned int cpu, struct mce *m);
 
 #ifdef CONFIG_X86_MCE_AMD
+void mce_threshold_create_device(unsigned int cpu);
+void mce_threshold_remove_device(unsigned int cpu);
 extern bool amd_filter_mce(struct mce *m);
 bool amd_mce_usable_address(struct mce *m);
 
@@ -293,6 +295,8 @@ static __always_inline void smca_extract_err_addr(struct mce *m)
 }
 
 #else
+static inline void mce_threshold_create_device(unsigned int cpu)	{ }
+static inline void mce_threshold_remove_device(unsigned int cpu)	{ }
 static inline bool amd_filter_mce(struct mce *m) { return false; }
 static inline bool amd_mce_usable_address(struct mce *m) { return false; }
 static inline void smca_extract_err_addr(struct mce *m) { }