Commit 40150d37 authored by Tejun Heo's avatar Tejun Heo
Browse files

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: default avatarTejun Heo <tj@kernel.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
parent 8ac83757

mm/percpu.c

+8 −8
Original line number Diff line number Diff line
@@ -83,18 +83,18 @@ struct pcpu_chunk { 
	struct page		*page[];	/* #cpus * UNIT_PAGES */

};



static int pcpu_unit_pages;

static int pcpu_unit_size;

static int pcpu_chunk_size;

static int pcpu_nr_slots;

static size_t pcpu_chunk_struct_size;

static int pcpu_unit_pages __read_mostly;

static int pcpu_unit_size __read_mostly;

static int pcpu_chunk_size __read_mostly;

static int pcpu_nr_slots __read_mostly;

static size_t pcpu_chunk_struct_size __read_mostly;



/* 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);



/* the size of kernel static area */

static int pcpu_static_size;

static int pcpu_static_size __read_mostly;



/*

 * One mutex to rule them all.
@@ -112,7 +112,7 @@ static int pcpu_static_size; 
 */

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 int __pcpu_size_to_slot(int size)