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percpu: add __read_mostly to variables which are mostly read only

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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>
This commit is contained in:
Tejun Heo
2009-02-24 12:32:28 +09:00
parent 8ac8375714
commit 40150d37be
1 changed files with 8 additions and 8 deletions
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16
mm/percpu.c
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@@ -83,18 +83,18 @@ struct pcpu_chunk {
struct page *page[]; /* #cpus * UNIT_PAGES */ struct page *page[]; /* #cpus * UNIT_PAGES */
}; };
static int pcpu_unit_pages; static int pcpu_unit_pages __read_mostly;
static int pcpu_unit_size; static int pcpu_unit_size __read_mostly;
static int pcpu_chunk_size; static int pcpu_chunk_size __read_mostly;
static int pcpu_nr_slots; static int pcpu_nr_slots __read_mostly;
static size_t pcpu_chunk_struct_size; static size_t pcpu_chunk_struct_size __read_mostly;
/* the address of the first chunk which starts with the kernel static area */ /* the address of the first chunk which starts with the kernel static area */
void *pcpu_base_addr; void *pcpu_base_addr __read_mostly;
EXPORT_SYMBOL_GPL(pcpu_base_addr); EXPORT_SYMBOL_GPL(pcpu_base_addr);
/* the size of kernel static area */ /* the size of kernel static area */
static int pcpu_static_size; static int pcpu_static_size __read_mostly;
/* /*
* One mutex to rule them all. * One mutex to rule them all.
@@ -112,7 +112,7 @@ static int pcpu_static_size;
*/ */
static DEFINE_MUTEX(pcpu_mutex); static DEFINE_MUTEX(pcpu_mutex);
static struct list_head *pcpu_slot; /* chunk list slots */ static struct list_head *pcpu_slot __read_mostly; /* chunk list slots */
static struct rb_root pcpu_addr_root = RB_ROOT; /* chunks by address */ static struct rb_root pcpu_addr_root = RB_ROOT; /* chunks by address */
static int __pcpu_size_to_slot(int size) static int __pcpu_size_to_slot(int size)