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authorLinus Torvalds <torvalds@linux-foundation.org>2019-09-18 01:58:50 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-09-18 01:58:50 +0300
commit1902314157b19754e0ff25b44527654847cfd127 (patch)
treee690a66d3c97c38e7b7ce0172a616da52a4440dd
parent3ee8d6c592dc7fb240574b84e9f9a7f9db4d4b42 (diff)
parent14d3761245551bdfc516abd8214a9f76bfd51435 (diff)
downloadlinux-1902314157b19754e0ff25b44527654847cfd127.tar.xz
Merge branch 'for-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu
Pull percpu updates from Dennis Zhou: "A couple of updates to clean up the code with no change in behavior" * 'for-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu: percpu: Use struct_size() helper percpu: fix typo in pcpu_setup_first_chunk() comment percpu: Make pcpu_setup_first_chunk() void function
-rw-r--r--arch/ia64/mm/contig.c5
-rw-r--r--arch/ia64/mm/discontig.c5
-rw-r--r--include/linux/percpu.h2
-rw-r--r--mm/percpu.c23
4 files changed, 12 insertions, 23 deletions
diff --git a/arch/ia64/mm/contig.c b/arch/ia64/mm/contig.c
index d29fb6b9fa33..db09a693f094 100644
--- a/arch/ia64/mm/contig.c
+++ b/arch/ia64/mm/contig.c
@@ -134,10 +134,7 @@ setup_per_cpu_areas(void)
ai->atom_size = PAGE_SIZE;
ai->alloc_size = PERCPU_PAGE_SIZE;
- rc = pcpu_setup_first_chunk(ai, __per_cpu_start + __per_cpu_offset[0]);
- if (rc)
- panic("failed to setup percpu area (err=%d)", rc);
-
+ pcpu_setup_first_chunk(ai, __per_cpu_start + __per_cpu_offset[0]);
pcpu_free_alloc_info(ai);
}
#else
diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c
index 921f3efe3538..219fc640414b 100644
--- a/arch/ia64/mm/discontig.c
+++ b/arch/ia64/mm/discontig.c
@@ -245,10 +245,7 @@ void __init setup_per_cpu_areas(void)
gi->cpu_map = &cpu_map[unit];
}
- rc = pcpu_setup_first_chunk(ai, base);
- if (rc)
- panic("failed to setup percpu area (err=%d)", rc);
-
+ pcpu_setup_first_chunk(ai, base);
pcpu_free_alloc_info(ai);
}
#endif
diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index 9909dc0e273a..5e76af742c80 100644
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -105,7 +105,7 @@ extern struct pcpu_alloc_info * __init pcpu_alloc_alloc_info(int nr_groups,
int nr_units);
extern void __init pcpu_free_alloc_info(struct pcpu_alloc_info *ai);
-extern int __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai,
+extern void __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai,
void *base_addr);
#ifdef CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK
diff --git a/mm/percpu.c b/mm/percpu.c
index 9821241fdede..7e06a1e58720 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -2125,7 +2125,7 @@ struct pcpu_alloc_info * __init pcpu_alloc_alloc_info(int nr_groups,
void *ptr;
int unit;
- base_size = ALIGN(sizeof(*ai) + nr_groups * sizeof(ai->groups[0]),
+ base_size = ALIGN(struct_size(ai, groups, nr_groups),
__alignof__(ai->groups[0].cpu_map[0]));
ai_size = base_size + nr_units * sizeof(ai->groups[0].cpu_map[0]);
@@ -2220,7 +2220,7 @@ static void pcpu_dump_alloc_info(const char *lvl,
* @base_addr: mapped address
*
* Initialize the first percpu chunk which contains the kernel static
- * perpcu area. This function is to be called from arch percpu area
+ * percpu area. This function is to be called from arch percpu area
* setup path.
*
* @ai contains all information necessary to initialize the first
@@ -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);
}