percpu: Make pcpu_setup_first_chunk() void function

pcpu_setup_first_chunk() will panic or BUG_ON if the are some
error and doesn't return any error, hence it can be defined to
return void.

Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Dennis Zhou <dennis@kernel.org>
[Dennis: fixed kbuild warning for pcpu_page_first_chunk()]

1 files changed, 7 insertions, 12 deletions

diff --git a/mm/percpu.c b/mm/percpu.c
index 9821241fdede..5a918a4b1da0 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -2267,12 +2267,9 @@ static void pcpu_dump_alloc_info(const char *lvl,
  * share the same vm, but use offset regions in the area allocation map.
  * The chunk serving the dynamic region is circulated in the chunk slots
  * and available for dynamic allocation like any other chunk.
- *
- * RETURNS:
- * 0 on success, -errno on failure.
  */
-int __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai,
-				  void *base_addr)
+void __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai,
+				   void *base_addr)
 {
 	size_t size_sum = ai->static_size + ai->reserved_size + ai->dyn_size;
 	size_t static_size, dyn_size;
@@ -2457,7 +2454,6 @@ int __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai,
 
 	/* we're done */
 	pcpu_base_addr = base_addr;
-	return 0;
 }
 
 #ifdef CONFIG_SMP
@@ -2710,7 +2706,7 @@ int __init pcpu_embed_first_chunk(size_t reserved_size, size_t dyn_size,
 	struct pcpu_alloc_info *ai;
 	size_t size_sum, areas_size;
 	unsigned long max_distance;
-	int group, i, highest_group, rc;
+	int group, i, highest_group, rc = 0;
 
 	ai = pcpu_build_alloc_info(reserved_size, dyn_size, atom_size,
 				   cpu_distance_fn);
@@ -2795,7 +2791,7 @@ int __init pcpu_embed_first_chunk(size_t reserved_size, size_t dyn_size,
 		PFN_DOWN(size_sum), ai->static_size, ai->reserved_size,
 		ai->dyn_size, ai->unit_size);
 
-	rc = pcpu_setup_first_chunk(ai, base);
+	pcpu_setup_first_chunk(ai, base);
 	goto out_free;
 
 out_free_areas:
@@ -2839,7 +2835,7 @@ int __init pcpu_page_first_chunk(size_t reserved_size,
 	int unit_pages;
 	size_t pages_size;
 	struct page **pages;
-	int unit, i, j, rc;
+	int unit, i, j, rc = 0;
 	int upa;
 	int nr_g0_units;
 
@@ -2920,7 +2916,7 @@ int __init pcpu_page_first_chunk(size_t reserved_size,
 		unit_pages, psize_str, ai->static_size,
 		ai->reserved_size, ai->dyn_size);
 
-	rc = pcpu_setup_first_chunk(ai, vm.addr);
+	pcpu_setup_first_chunk(ai, vm.addr);
 	goto out_free_ar;
 
 enomem:
@@ -3014,8 +3010,7 @@ void __init setup_per_cpu_areas(void)
 	ai->groups[0].nr_units = 1;
 	ai->groups[0].cpu_map[0] = 0;
 
-	if (pcpu_setup_first_chunk(ai, fc) < 0)
-		panic("Failed to initialize percpu areas.");
+	pcpu_setup_first_chunk(ai, fc);
 	pcpu_free_alloc_info(ai);
 }