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Subject[patch 2/4] percpu: Rename variables PERCPU_ENOUGH_ROOM -> PERCPU_AREA_SIZE
Rename PERCPU_ENOUGH_ROOM to PERCPU_AREA_SIZE since its really specifying the
size of the percpu areas.

Rename PERCPU_MODULE_RESERVE to PERCPU_RESERVE_SIZE in anticipation of more
general use of that reserve.

Signed-off-by: Christoph Lameter <cl@linux-foundation.org>

---
arch/ia64/include/asm/percpu.h | 2 +-
arch/powerpc/kernel/setup_64.c | 4 ++--
arch/sparc64/kernel/smp.c | 2 +-
arch/x86/kernel/setup_percpu.c | 3 +--
include/linux/percpu.h | 10 +++++-----
init/main.c | 4 ++--
kernel/lockdep.c | 2 +-
kernel/module.c | 2 +-
8 files changed, 14 insertions(+), 15 deletions(-)
Index: linux-2.6/arch/ia64/include/asm/percpu.h
===================================================================
--- linux-2.6.orig/arch/ia64/include/asm/percpu.h 2008-09-16 18:20:19.000000000 -0700
+++ linux-2.6/arch/ia64/include/asm/percpu.h 2008-09-16 18:27:10.000000000 -0700
@@ -6,7 +6,7 @@
* David Mosberger-Tang <davidm@hpl.hp.com>
*/

-#define PERCPU_ENOUGH_ROOM PERCPU_PAGE_SIZE
+#define PERCPU_AREA_SIZE PERCPU_PAGE_SIZE

#ifdef __ASSEMBLY__
# define THIS_CPU(var) (per_cpu__##var) /* use this to mark accesses to per-CPU variables... */
Index: linux-2.6/include/linux/percpu.h
===================================================================
--- linux-2.6.orig/include/linux/percpu.h 2008-09-16 18:25:38.000000000 -0700
+++ linux-2.6/include/linux/percpu.h 2008-09-16 18:28:55.000000000 -0700
@@ -36,16 +36,16 @@

extern unsigned int percpu_reserve;
/* Enough to cover all DEFINE_PER_CPUs in kernel, including modules. */
-#ifndef PERCPU_ENOUGH_ROOM
+#ifndef PERCPU_AREA_SIZE
#ifdef CONFIG_MODULES
-#define PERCPU_MODULE_RESERVE 8192
+#define PERCPU_RESERVE_SIZE 8192
#else
-#define PERCPU_MODULE_RESERVE 0
+#define PERCPU_RESERVE_SIZE 0
#endif

-#define PERCPU_ENOUGH_ROOM \
+#define PERCPU_AREA_SIZE \
(__per_cpu_end - __per_cpu_start + percpu_reserve)
-#endif /* PERCPU_ENOUGH_ROOM */
+#endif /* PERCPU_AREA_SIZE */

/*
* Must be an lvalue. Since @var must be a simple identifier,
Index: linux-2.6/arch/powerpc/kernel/setup_64.c
===================================================================
--- linux-2.6.orig/arch/powerpc/kernel/setup_64.c 2008-09-16 18:13:45.000000000 -0700
+++ linux-2.6/arch/powerpc/kernel/setup_64.c 2008-09-16 18:25:43.000000000 -0700
@@ -599,8 +599,8 @@ void __init setup_per_cpu_areas(void)
/* Copy section for each CPU (we discard the original) */
size = ALIGN(__per_cpu_end - __per_cpu_start, PAGE_SIZE);
#ifdef CONFIG_MODULES
- if (size < PERCPU_ENOUGH_ROOM)
- size = PERCPU_ENOUGH_ROOM;
+ if (size < PERCPU_AREA_SIZE)
+ size = PERCPU_AREA_SIZE;
#endif

for_each_possible_cpu(i) {
Index: linux-2.6/arch/sparc64/kernel/smp.c
===================================================================
--- linux-2.6.orig/arch/sparc64/kernel/smp.c 2008-09-16 18:13:45.000000000 -0700
+++ linux-2.6/arch/sparc64/kernel/smp.c 2008-09-16 18:25:43.000000000 -0700
@@ -1386,7 +1386,7 @@ void __init real_setup_per_cpu_areas(voi
char *ptr;

/* Copy section for each CPU (we discard the original) */
- goal = PERCPU_ENOUGH_ROOM;
+ goal = PERCPU_AREA_SIZE;

__per_cpu_shift = PAGE_SHIFT;
for (size = PAGE_SIZE; size < goal; size <<= 1UL)
Index: linux-2.6/arch/x86/kernel/setup_percpu.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/setup_percpu.c 2008-09-16 18:13:45.000000000 -0700
+++ linux-2.6/arch/x86/kernel/setup_percpu.c 2008-09-16 18:25:43.000000000 -0700
@@ -140,7 +140,7 @@ static void __init setup_cpu_pda_map(voi
*/
void __init setup_per_cpu_areas(void)
{
- ssize_t size = PERCPU_ENOUGH_ROOM;
+ ssize_t size = PERCPU_AREA_SIZE;
char *ptr;
int cpu;

@@ -148,7 +148,6 @@ void __init setup_per_cpu_areas(void)
setup_cpu_pda_map();

/* Copy section for each CPU (we discard the original) */
- size = PERCPU_ENOUGH_ROOM;
printk(KERN_INFO "PERCPU: Allocating %zd bytes of per cpu data\n",
size);

Index: linux-2.6/init/main.c
===================================================================
--- linux-2.6.orig/init/main.c 2008-09-16 18:25:38.000000000 -0700
+++ linux-2.6/init/main.c 2008-09-16 18:29:40.000000000 -0700
@@ -253,7 +253,7 @@ static int __init loglevel(char *str)

early_param("loglevel", loglevel);

-unsigned int percpu_reserve = PERCPU_MODULE_RESERVE;
+unsigned int percpu_reserve = PERCPU_RESERVE_SIZE;

static int __init init_percpu_reserve(char *str)
{
@@ -406,7 +406,7 @@ static void __init setup_per_cpu_areas(v
unsigned long nr_possible_cpus = num_possible_cpus();

/* Copy section for each CPU (we discard the original) */
- size = ALIGN(PERCPU_ENOUGH_ROOM, PAGE_SIZE);
+ size = ALIGN(PERCPU_AREA_SIZE, PAGE_SIZE);
printk(KERN_INFO "percpu area: %d bytes total, %d available.\n",
size, size - (__per_cpu_end - __per_cpu_start));

Index: linux-2.6/kernel/lockdep.c
===================================================================
--- linux-2.6.orig/kernel/lockdep.c 2008-09-16 18:13:45.000000000 -0700
+++ linux-2.6/kernel/lockdep.c 2008-09-16 18:25:43.000000000 -0700
@@ -639,7 +639,7 @@ static int static_obj(void *obj)
*/
for_each_possible_cpu(i) {
start = (unsigned long) &__per_cpu_start + per_cpu_offset(i);
- end = (unsigned long) &__per_cpu_start + PERCPU_ENOUGH_ROOM
+ end = (unsigned long) &__per_cpu_start + PERCPU_AREA_SIZE
+ per_cpu_offset(i);

if ((addr >= start) && (addr < end))
Index: linux-2.6/kernel/module.c
===================================================================
--- linux-2.6.orig/kernel/module.c 2008-09-16 18:13:45.000000000 -0700
+++ linux-2.6/kernel/module.c 2008-09-16 18:25:43.000000000 -0700
@@ -476,7 +476,7 @@ static int percpu_modinit(void)
/* Static in-kernel percpu data (used). */
pcpu_size[0] = -(__per_cpu_end-__per_cpu_start);
/* Free room. */
- pcpu_size[1] = PERCPU_ENOUGH_ROOM + pcpu_size[0];
+ pcpu_size[1] = PERCPU_AREA_SIZE + pcpu_size[0];
if (pcpu_size[1] < 0) {
printk(KERN_ERR "No per-cpu room for modules.\n");
pcpu_num_used = 1;
--


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