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authorTejun Heo <tj@kernel.org>2009-02-23 22:32:28 -0500
committerTejun Heo <tj@kernel.org>2009-02-24 00:24:30 -0500
commit40150d37be7f7949b2ec07d511244da856647d84 (patch)
tree6edc4e8d0a0302328f5e65ec6378b703cb6c2e35 /mm
parent8ac837571491e239e64bd87863c1679d8002e8a2 (diff)
percpu: add __read_mostly to variables which are mostly read only
Most global variables in percpu allocator are initialized during boot and read only from that point on. Add __read_mostly as per Rusty's suggestion. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'mm')
-rw-r--r--mm/percpu.c16
1 files changed, 8 insertions, 8 deletions
diff --git a/mm/percpu.c b/mm/percpu.c
index 9ac01980cce0..5954e7a9eb1e 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -83,18 +83,18 @@ struct pcpu_chunk {
83 struct page *page[]; /* #cpus * UNIT_PAGES */ 83 struct page *page[]; /* #cpus * UNIT_PAGES */
84}; 84};
85 85
86static int pcpu_unit_pages; 86static int pcpu_unit_pages __read_mostly;
87static int pcpu_unit_size; 87static int pcpu_unit_size __read_mostly;
88static int pcpu_chunk_size; 88static int pcpu_chunk_size __read_mostly;
89static int pcpu_nr_slots; 89static int pcpu_nr_slots __read_mostly;
90static size_t pcpu_chunk_struct_size; 90static size_t pcpu_chunk_struct_size __read_mostly;
91 91
92/* the address of the first chunk which starts with the kernel static area */ 92/* the address of the first chunk which starts with the kernel static area */
93void *pcpu_base_addr; 93void *pcpu_base_addr __read_mostly;
94EXPORT_SYMBOL_GPL(pcpu_base_addr); 94EXPORT_SYMBOL_GPL(pcpu_base_addr);
95 95
96/* the size of kernel static area */ 96/* the size of kernel static area */
97static int pcpu_static_size; 97static int pcpu_static_size __read_mostly;
98 98
99/* 99/*
100 * One mutex to rule them all. 100 * One mutex to rule them all.
@@ -112,7 +112,7 @@ static int pcpu_static_size;
112 */ 112 */
113static DEFINE_MUTEX(pcpu_mutex); 113static DEFINE_MUTEX(pcpu_mutex);
114 114
115static struct list_head *pcpu_slot; /* chunk list slots */ 115static struct list_head *pcpu_slot __read_mostly; /* chunk list slots */
116static struct rb_root pcpu_addr_root = RB_ROOT; /* chunks by address */ 116static struct rb_root pcpu_addr_root = RB_ROOT; /* chunks by address */
117 117
118static int __pcpu_size_to_slot(int size) 118static int __pcpu_size_to_slot(int size)