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Subject[PATCH 3/4] mm: percpu: Add generic pcpu_fc_alloc/free funciton
Date
With previous patch, we could add a generic pcpu first chunk
allocate and free function to cleanup the duplicated definations.
on each architecture.

Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Christoph Lameter <cl@linux.com>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
---
arch/mips/mm/init.c | 16 +------
arch/powerpc/kernel/setup_64.c | 51 +---------------------
arch/sparc/kernel/smp_64.c | 50 +---------------------
arch/x86/kernel/setup_percpu.c | 59 +------------------------
drivers/base/arch_numa.c | 19 +--------
include/linux/percpu.h | 9 +---
mm/percpu.c | 78 ++++++++++++++++++++--------------
7 files changed, 54 insertions(+), 228 deletions(-)

diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index 1d8f2844704c..5a8002839550 100644
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -524,19 +524,6 @@ static int __init pcpu_cpu_to_node(int cpu)
return cpu_to_node(cpu);
}

-static void * __init pcpu_fc_alloc(unsigned int cpu, size_t size, size_t align,
- pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn)
-{
- return memblock_alloc_try_nid(size, align, __pa(MAX_DMA_ADDRESS),
- MEMBLOCK_ALLOC_ACCESSIBLE,
- cpu_to_nd_fn(cpu));
-}
-
-static void __init pcpu_fc_free(void *ptr, size_t size)
-{
- memblock_free(ptr, size);
-}
-
void __init setup_per_cpu_areas(void)
{
unsigned long delta;
@@ -550,8 +537,7 @@ void __init setup_per_cpu_areas(void)
rc = pcpu_embed_first_chunk(PERCPU_MODULE_RESERVE,
PERCPU_DYNAMIC_RESERVE, PAGE_SIZE,
pcpu_cpu_distance,
- pcpu_cpu_to_node,
- pcpu_fc_alloc, pcpu_fc_free);
+ pcpu_cpu_to_node);
if (rc < 0)
panic("Failed to initialize percpu areas.");

diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index b79b10ae466f..a0c55c6e3023 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -771,50 +771,6 @@ void __init emergency_stack_init(void)
}

#ifdef CONFIG_SMP
-/**
- * pcpu_alloc_bootmem - NUMA friendly alloc_bootmem wrapper for percpu
- * @cpu: cpu to allocate for
- * @size: size allocation in bytes
- * @align: alignment
- *
- * Allocate @size bytes aligned at @align for cpu @cpu. This wrapper
- * does the right thing for NUMA regardless of the current
- * configuration.
- *
- * RETURNS:
- * Pointer to the allocated area on success, NULL on failure.
- */
-static void * __init pcpu_alloc_bootmem(unsigned int cpu, size_t size, size_t align,
- pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn)
-{
- const unsigned long goal = __pa(MAX_DMA_ADDRESS);
-#ifdef CONFIG_NUMA
- int node = cpu_to_nd_fun(cpu);
- void *ptr;
-
- if (!node_online(node) || !NODE_DATA(node)) {
- ptr = memblock_alloc_from(size, align, goal);
- pr_info("cpu %d has no node %d or node-local memory\n",
- cpu, node);
- pr_debug("per cpu data for cpu%d %lu bytes at %016lx\n",
- cpu, size, __pa(ptr));
- } else {
- ptr = memblock_alloc_try_nid(size, align, goal,
- MEMBLOCK_ALLOC_ACCESSIBLE, node);
- pr_debug("per cpu data for cpu%d %lu bytes on node%d at "
- "%016lx\n", cpu, size, node, __pa(ptr));
- }
- return ptr;
-#else
- return memblock_alloc_from(size, align, goal);
-#endif
-}
-
-static void __init pcpu_free_bootmem(void *ptr, size_t size)
-{
- memblock_free(ptr, size);
-}
-
static int pcpu_cpu_distance(unsigned int from, unsigned int to)
{
if (early_cpu_to_node(from) == early_cpu_to_node(to))
@@ -896,8 +852,7 @@ void __init setup_per_cpu_areas(void)

if (pcpu_chosen_fc != PCPU_FC_PAGE) {
rc = pcpu_embed_first_chunk(0, dyn_size, atom_size, pcpu_cpu_distance,
- pcpu_cpu_to_node,
- pcpu_alloc_bootmem, pcpu_free_bootmem);
+ pcpu_cpu_to_node);
if (rc)
pr_warn("PERCPU: %s allocator failed (%d), "
"falling back to page size\n",
@@ -905,9 +860,7 @@ void __init setup_per_cpu_areas(void)
}

if (rc < 0)
- rc = pcpu_page_first_chunk(0, pcpu_cpu_to_node,
- pcpu_alloc_bootmem, pcpu_free_bootmem,
- pcpu_populate_pte);
+ rc = pcpu_page_first_chunk(0, pcpu_cpu_to_node, pcpu_populate_pte);
if (rc < 0)
panic("cannot initialize percpu area (err=%d)", rc);

diff --git a/arch/sparc/kernel/smp_64.c b/arch/sparc/kernel/smp_64.c
index 14d719aa318d..ef815b3f0592 100644
--- a/arch/sparc/kernel/smp_64.c
+++ b/arch/sparc/kernel/smp_64.c
@@ -1526,50 +1526,6 @@ void smp_send_stop(void)
smp_call_function(stop_this_cpu, NULL, 0);
}

-/**
- * pcpu_alloc_bootmem - NUMA friendly alloc_bootmem wrapper for percpu
- * @cpu: cpu to allocate for
- * @size: size allocation in bytes
- * @align: alignment
- *
- * Allocate @size bytes aligned at @align for cpu @cpu. This wrapper
- * does the right thing for NUMA regardless of the current
- * configuration.
- *
- * RETURNS:
- * Pointer to the allocated area on success, NULL on failure.
- */
-static void * __init pcpu_alloc_bootmem(unsigned int cpu, size_t size, size_t align,
- pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn)
-{
- const unsigned long goal = __pa(MAX_DMA_ADDRESS);
-#ifdef CONFIG_NUMA
- int node = cpu_to_nd_fn(cpu);
- void *ptr;
-
- if (!node_online(node) || !NODE_DATA(node)) {
- ptr = memblock_alloc_from(size, align, goal);
- pr_info("cpu %d has no node %d or node-local memory\n",
- cpu, node);
- pr_debug("per cpu data for cpu%d %lu bytes at %016lx\n",
- cpu, size, __pa(ptr));
- } else {
- ptr = memblock_alloc_try_nid(size, align, goal,
- MEMBLOCK_ALLOC_ACCESSIBLE, node);
- pr_debug("per cpu data for cpu%d %lu bytes on node%d at "
- "%016lx\n", cpu, size, node, __pa(ptr));
- }
- return ptr;
-#else
- return memblock_alloc_from(size, align, goal);
-#endif
-}
-
-static void __init pcpu_free_bootmem(void *ptr, size_t size)
-{
- memblock_free(ptr, size);
-}
-
static int __init pcpu_cpu_distance(unsigned int from, unsigned int to)
{
if (cpu_to_node(from) == cpu_to_node(to))
@@ -1646,9 +1602,7 @@ void __init setup_per_cpu_areas(void)
rc = pcpu_embed_first_chunk(PERCPU_MODULE_RESERVE,
PERCPU_DYNAMIC_RESERVE, 4 << 20,
pcpu_cpu_distance,
- pcpu_cpu_to_node,
- pcpu_alloc_bootmem,
- pcpu_free_bootmem);
+ pcpu_cpu_to_node);
if (rc)
pr_warn("PERCPU: %s allocator failed (%d), "
"falling back to page size\n",
@@ -1657,8 +1611,6 @@ void __init setup_per_cpu_areas(void)
if (rc < 0)
rc = pcpu_page_first_chunk(PERCPU_MODULE_RESERVE,
pcpu_cpu_to_node,
- pcpu_alloc_bootmem,
- pcpu_free_bootmem,
pcpu_populate_pte);
if (rc < 0)
panic("cannot initialize percpu area (err=%d)", rc);
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index 1d41f4844149..15c5bf3cbe5f 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -84,61 +84,6 @@ static bool __init pcpu_need_numa(void)
}
#endif

-/**
- * pcpu_alloc_bootmem - NUMA friendly alloc_bootmem wrapper for percpu
- * @cpu: cpu to allocate for
- * @size: size allocation in bytes
- * @align: alignment
- *
- * Allocate @size bytes aligned at @align for cpu @cpu. This wrapper
- * does the right thing for NUMA regardless of the current
- * configuration.
- *
- * RETURNS:
- * Pointer to the allocated area on success, NULL on failure.
- */
-static void * __init pcpu_alloc_bootmem(unsigned int cpu, unsigned long size, unsigned long align,
- pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn)
-{
- const unsigned long goal = __pa(MAX_DMA_ADDRESS);
-#ifdef CONFIG_NUMA
- int node = cpu_to_nd_fn(cpu);
- void *ptr;
-
- if (!node_online(node) || !NODE_DATA(node)) {
- ptr = memblock_alloc_from(size, align, goal);
- pr_info("cpu %d has no node %d or node-local memory\n",
- cpu, node);
- pr_debug("per cpu data for cpu%d %lu bytes at %016lx\n",
- cpu, size, __pa(ptr));
- } else {
- ptr = memblock_alloc_try_nid(size, align, goal,
- MEMBLOCK_ALLOC_ACCESSIBLE,
- node);
-
- pr_debug("per cpu data for cpu%d %lu bytes on node%d at %016lx\n",
- cpu, size, node, __pa(ptr));
- }
- return ptr;
-#else
- return memblock_alloc_from(size, align, goal);
-#endif
-}
-
-/*
- * Helpers for first chunk memory allocation
- */
-static void * __init pcpu_fc_alloc(unsigned int cpu, size_t size, size_t align,
- pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn)
-{
- return pcpu_alloc_bootmem(cpu, size, align, cpu_to_nd_fn);
-}
-
-static void __init pcpu_fc_free(void *ptr, size_t size)
-{
- memblock_free(ptr, size);
-}
-
static int __init pcpu_cpu_distance(unsigned int from, unsigned int to)
{
#ifdef CONFIG_NUMA
@@ -211,8 +156,7 @@ void __init setup_per_cpu_areas(void)
rc = pcpu_embed_first_chunk(PERCPU_FIRST_CHUNK_RESERVE,
dyn_size, atom_size,
pcpu_cpu_distance,
- pcpu_cpu_to_node,
- pcpu_fc_alloc, pcpu_fc_free);
+ pcpu_cpu_to_node);
if (rc < 0)
pr_warn("%s allocator failed (%d), falling back to page size\n",
pcpu_fc_names[pcpu_chosen_fc], rc);
@@ -220,7 +164,6 @@ void __init setup_per_cpu_areas(void)
if (rc < 0)
rc = pcpu_page_first_chunk(PERCPU_FIRST_CHUNK_RESERVE,
pcpu_cpu_to_node,
- pcpu_fc_alloc, pcpu_fc_free,
pcpup_populate_pte);
if (rc < 0)
panic("cannot initialize percpu area (err=%d)", rc);
diff --git a/drivers/base/arch_numa.c b/drivers/base/arch_numa.c
index dae861838535..23a10cc36165 100644
--- a/drivers/base/arch_numa.c
+++ b/drivers/base/arch_numa.c
@@ -155,20 +155,6 @@ static int __init pcpu_cpu_distance(unsigned int from, unsigned int to)
return node_distance(early_cpu_to_node(from), early_cpu_to_node(to));
}

-static void * __init pcpu_fc_alloc(unsigned int cpu, size_t size, size_t align,
- pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn)
-{
- int nid = cpu_to_nd_fn(cpu);
-
- return memblock_alloc_try_nid(size, align,
- __pa(MAX_DMA_ADDRESS), MEMBLOCK_ALLOC_ACCESSIBLE, nid);
-}
-
-static void __init pcpu_fc_free(void *ptr, size_t size)
-{
- memblock_free(ptr, size);
-}
-
#ifdef CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK
static void __init pcpu_populate_pte(unsigned long addr)
{
@@ -229,8 +215,7 @@ void __init setup_per_cpu_areas(void)
rc = pcpu_embed_first_chunk(PERCPU_MODULE_RESERVE,
PERCPU_DYNAMIC_RESERVE, PAGE_SIZE,
pcpu_cpu_distance,
- early_cpu_to_node,
- pcpu_fc_alloc, pcpu_fc_free);
+ early_cpu_to_node);
#ifdef CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK
if (rc < 0)
pr_warn("PERCPU: %s allocator failed (%d), falling back to page size\n",
@@ -242,8 +227,6 @@ void __init setup_per_cpu_areas(void)
if (rc < 0)
rc = pcpu_page_first_chunk(PERCPU_MODULE_RESERVE,
early_cpu_to_node,
- pcpu_fc_alloc,
- pcpu_fc_free,
pcpu_populate_pte);
#endif
if (rc < 0)
diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index e4078bf45fd5..d73c97ef4ff4 100644
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -95,9 +95,6 @@ extern const char * const pcpu_fc_names[PCPU_FC_NR];
extern enum pcpu_fc pcpu_chosen_fc;

typedef int (pcpu_fc_cpu_to_node_fn_t)(int cpu);
-typedef void * (*pcpu_fc_alloc_fn_t)(unsigned int cpu, size_t size, size_t align,
- pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn);
-typedef void (*pcpu_fc_free_fn_t)(void *ptr, size_t size);
typedef void (*pcpu_fc_populate_pte_fn_t)(unsigned long addr);
typedef int (pcpu_fc_cpu_distance_fn_t)(unsigned int from, unsigned int to);

@@ -112,16 +109,12 @@ extern void __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai,
extern int __init pcpu_embed_first_chunk(size_t reserved_size, size_t dyn_size,
size_t atom_size,
pcpu_fc_cpu_distance_fn_t cpu_distance_fn,
- pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn,
- pcpu_fc_alloc_fn_t alloc_fn,
- pcpu_fc_free_fn_t free_fn);
+ pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn);
#endif

#ifdef CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK
extern int __init pcpu_page_first_chunk(size_t reserved_size,
pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn,
- pcpu_fc_alloc_fn_t alloc_fn,
- pcpu_fc_free_fn_t free_fn,
pcpu_fc_populate_pte_fn_t populate_pte_fn);
#endif

diff --git a/mm/percpu.c b/mm/percpu.c
index 267a4d295fcf..0f79b6d9a6d6 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -2992,6 +2992,42 @@ static struct pcpu_alloc_info * __init __flatten pcpu_build_alloc_info(

return ai;
}
+
+static void * __init pcpu_fc_alloc(unsigned int cpu, size_t size, size_t align,
+ pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn)
+{
+ const unsigned long goal = __pa(MAX_DMA_ADDRESS);
+#ifdef CONFIG_NUMA
+ int node = NUMA_NO_NODE;
+ void *ptr;
+
+ if (cpu_to_nd_fn)
+ node = cpu_to_nd_fn(cpu);
+
+ if (node == NUMA_NO_NODE || !node_online(node) || !NODE_DATA(node)) {
+ ptr = memblock_alloc_from(size, align, goal);
+ pr_info("cpu %d has no node %d or node-local memory\n",
+ cpu, node);
+ pr_debug("per cpu data for cpu%d %zu bytes at 0x%llx\n",
+ cpu, size, (u64)__pa(ptr));
+ } else {
+ ptr = memblock_alloc_try_nid(size, align, goal,
+ MEMBLOCK_ALLOC_ACCESSIBLE,
+ node);
+
+ pr_debug("per cpu data for cpu%d %zu bytes on node%d at 0x%llx\n",
+ cpu, size, node, (u64)__pa(ptr));
+ }
+ return ptr;
+#else
+ return memblock_alloc_from(size, align, goal);
+#endif
+}
+
+static void __init pcpu_fc_free(void *ptr, size_t size)
+{
+ memblock_free(ptr, size);
+}
#endif /* BUILD_EMBED_FIRST_CHUNK || BUILD_PAGE_FIRST_CHUNK */

#if defined(BUILD_EMBED_FIRST_CHUNK)
@@ -3002,14 +3038,12 @@ static struct pcpu_alloc_info * __init __flatten pcpu_build_alloc_info(
* @atom_size: allocation atom size
* @cpu_distance_fn: callback to determine distance between cpus, optional
* @cpu_to_nd_fn: callback to convert cpu to it's node, optional
- * @alloc_fn: function to allocate percpu page
- * @free_fn: function to free percpu page
*
* This is a helper to ease setting up embedded first percpu chunk and
* can be called where pcpu_setup_first_chunk() is expected.
*
* If this function is used to setup the first chunk, it is allocated
- * by calling @alloc_fn and used as-is without being mapped into
+ * by calling pcpu_fc_alloc and used as-is without being mapped into
* vmalloc area. Allocations are always whole multiples of @atom_size
* aligned to @atom_size.
*
@@ -3023,7 +3057,7 @@ static struct pcpu_alloc_info * __init __flatten pcpu_build_alloc_info(
* @dyn_size specifies the minimum dynamic area size.
*
* If the needed size is smaller than the minimum or specified unit
- * size, the leftover is returned using @free_fn.
+ * size, the leftover is returned using pcpu_fc_free.
*
* RETURNS:
* 0 on success, -errno on failure.
@@ -3031,9 +3065,7 @@ static struct pcpu_alloc_info * __init __flatten pcpu_build_alloc_info(
int __init pcpu_embed_first_chunk(size_t reserved_size, size_t dyn_size,
size_t atom_size,
pcpu_fc_cpu_distance_fn_t cpu_distance_fn,
- pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn,
- pcpu_fc_alloc_fn_t alloc_fn,
- pcpu_fc_free_fn_t free_fn)
+ pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn)
{
void *base = (void *)ULONG_MAX;
void **areas = NULL;
@@ -3068,7 +3100,7 @@ int __init pcpu_embed_first_chunk(size_t reserved_size, size_t dyn_size,
BUG_ON(cpu == NR_CPUS);

/* allocate space for the whole group */
- ptr = alloc_fn(cpu, gi->nr_units * ai->unit_size, atom_size, cpu_to_nd_fn);
+ ptr = pcpu_fc_alloc(cpu, gi->nr_units * ai->unit_size, atom_size, cpu_to_nd_fn);
if (!ptr) {
rc = -ENOMEM;
goto out_free_areas;
@@ -3107,12 +3139,12 @@ int __init pcpu_embed_first_chunk(size_t reserved_size, size_t dyn_size,
for (i = 0; i < gi->nr_units; i++, ptr += ai->unit_size) {
if (gi->cpu_map[i] == NR_CPUS) {
/* unused unit, free whole */
- free_fn(ptr, ai->unit_size);
+ pcpu_fc_free(ptr, ai->unit_size);
continue;
}
/* copy and return the unused part */
memcpy(ptr, __per_cpu_load, ai->static_size);
- free_fn(ptr + size_sum, ai->unit_size - size_sum);
+ pcpu_fc_free(ptr + size_sum, ai->unit_size - size_sum);
}
}

@@ -3131,7 +3163,7 @@ int __init pcpu_embed_first_chunk(size_t reserved_size, size_t dyn_size,
out_free_areas:
for (group = 0; group < ai->nr_groups; group++)
if (areas[group])
- free_fn(areas[group],
+ pcpu_fc_free(areas[group],
ai->groups[group].nr_units * ai->unit_size);
out_free:
pcpu_free_alloc_info(ai);
@@ -3146,8 +3178,6 @@ int __init pcpu_embed_first_chunk(size_t reserved_size, size_t dyn_size,
* pcpu_page_first_chunk - map the first chunk using PAGE_SIZE pages
* @reserved_size: the size of reserved percpu area in bytes
* @cpu_to_nd_fn: callback to convert cpu to it's node, optional
- * @alloc_fn: function to allocate percpu page, always called with PAGE_SIZE
- * @free_fn: function to free percpu page, always called with PAGE_SIZE
* @populate_pte_fn: function to populate pte
*
* This is a helper to ease setting up page-remapped first percpu
@@ -3161,8 +3191,6 @@ int __init pcpu_embed_first_chunk(size_t reserved_size, size_t dyn_size,
*/
int __init pcpu_page_first_chunk(size_t reserved_size,
pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn,
- pcpu_fc_alloc_fn_t alloc_fn,
- pcpu_fc_free_fn_t free_fn,
pcpu_fc_populate_pte_fn_t populate_pte_fn)
{
static struct vm_struct vm;
@@ -3205,7 +3233,7 @@ int __init pcpu_page_first_chunk(size_t reserved_size,
for (i = 0; i < unit_pages; i++) {
void *ptr;

- ptr = alloc_fn(cpu, PAGE_SIZE, PAGE_SIZE, cpu_to_nd_fn);
+ ptr = pcpu_fc_alloc(cpu, PAGE_SIZE, PAGE_SIZE, cpu_to_nd_fn);
if (!ptr) {
pr_warn("failed to allocate %s page for cpu%u\n",
psize_str, cpu);
@@ -3257,7 +3285,7 @@ int __init pcpu_page_first_chunk(size_t reserved_size,

enomem:
while (--j >= 0)
- free_fn(page_address(pages[j]), PAGE_SIZE);
+ pcpu_fc_free(page_address(pages[j]), PAGE_SIZE);
rc = -ENOMEM;
out_free_ar:
memblock_free(pages, pages_size);
@@ -3282,17 +3310,6 @@ int __init pcpu_page_first_chunk(size_t reserved_size,
unsigned long __per_cpu_offset[NR_CPUS] __read_mostly;
EXPORT_SYMBOL(__per_cpu_offset);

-static void * __init pcpu_dfl_fc_alloc(unsigned int cpu, size_t size, size_t align,
- pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn)
-{
- return memblock_alloc_from(size, align, __pa(MAX_DMA_ADDRESS));
-}
-
-static void __init pcpu_dfl_fc_free(void *ptr, size_t size)
-{
- memblock_free(ptr, size);
-}
-
void __init setup_per_cpu_areas(void)
{
unsigned long delta;
@@ -3303,9 +3320,8 @@ void __init setup_per_cpu_areas(void)
* Always reserve area for module percpu variables. That's
* what the legacy allocator did.
*/
- rc = pcpu_embed_first_chunk(PERCPU_MODULE_RESERVE,
- PERCPU_DYNAMIC_RESERVE, PAGE_SIZE, NULL, NULL,
- pcpu_dfl_fc_alloc, pcpu_dfl_fc_free);
+ rc = pcpu_embed_first_chunk(PERCPU_MODULE_RESERVE, PERCPU_DYNAMIC_RESERVE,
+ PAGE_SIZE, NULL, NULL);
if (rc < 0)
panic("Failed to initialize percpu areas.");

--
2.18.0.huawei.25
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