[patch 03/14] Modules: Fold percpu_modcopy into module.c and get rid of the macro from hell

Christoph Lameter
2007-11-27T00:15:22Z

[-- Attachment #1: modcopy --]
[-- Type: text/plain, Size: 7633 bytes --]

percpu_modcopy() is defined multiple times in arch files. However, the only
user is module.c. Put a static definition into module.c and remove
the definitions from the arch files.

Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Christoph Lameter <clameter@sgi.com>

---
arch/ia64/kernel/module.c | 10 ----------
include/asm-generic/percpu.h | 8 --------
include/asm-ia64/percpu.h | 5 -----
include/asm-powerpc/percpu.h | 9 ---------
include/asm-s390/percpu.h | 9 ---------
include/asm-sparc64/percpu.h | 8 --------
include/asm-x86/percpu_32.h | 9 ---------
include/asm-x86/percpu_64.h | 9 ---------
kernel/module.c | 8 ++++++++
9 files changed, 8 insertions(+), 67 deletions(-)

Index: linux-2.6/include/asm-generic/percpu.h
===================================================================
--- linux-2.6.orig/include/asm-generic/percpu.h 2007-11-21 13:11:18.430858642 -0800
+++ linux-2.6/include/asm-generic/percpu.h 2007-11-21 13:11:42.871108294 -0800
@@ -26,14 +26,6 @@ extern unsigned long __per_cpu_offset[NR
#define __get_cpu_var(var) per_cpu(var, smp_processor_id())
#define __raw_get_cpu_var(var) per_cpu(var, raw_smp_processor_id())

-/* A macro to avoid #include hell... */
-#define percpu_modcopy(pcpudst, src, size) \
-do { \
- unsigned int __i; \
- for_each_possible_cpu(__i) \
- memcpy((pcpudst)+__per_cpu_offset[__i], \
- (src), (size)); \
-} while (0)
#else /* ! SMP */

#define DEFINE_PER_CPU(type, name) \
Index: linux-2.6/arch/ia64/kernel/module.c
===================================================================
--- linux-2.6.orig/arch/ia64/kernel/module.c 2007-11-21 13:13:06.587858751 -0800
+++ linux-2.6/arch/ia64/kernel/module.c 2007-11-21 13:13:19.527309025 -0800
@@ -941,13 +941,3 @@ module_arch_cleanup (struct module *mod)
unw_remove_unwind_table(mod->arch.core_unw_table);
}

-#ifdef CONFIG_SMP
-void
-percpu_modcopy (void *pcpudst, const void *src, unsigned long size)
-{
- unsigned int i;
- for_each_possible_cpu(i) {
- memcpy(pcpudst + __per_cpu_offset[i], src, size);
- }
-}
-#endif /* CONFIG_SMP */
Index: linux-2.6/include/asm-ia64/percpu.h
===================================================================
--- linux-2.6.orig/include/asm-ia64/percpu.h 2007-11-21 13:12:37.140358213 -0800
+++ linux-2.6/include/asm-ia64/percpu.h 2007-11-21 13:12:55.271731039 -0800
@@ -39,10 +39,6 @@
DEFINE_PER_CPU(type, name)
#endif

-/*
- * Pretty much a literal copy of asm-generic/percpu.h, except that percpu_modcopy() is an
- * external routine, to avoid include-hell.
- */
#ifdef CONFIG_SMP

extern unsigned long __per_cpu_offset[NR_CPUS];
@@ -55,7 +51,6 @@ DECLARE_PER_CPU(unsigned long, local_per
#define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __ia64_per_cpu_var(local_per_cpu_offset)))
#define __raw_get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __ia64_per_cpu_var(local_per_cpu_offset)))

-extern void percpu_modcopy(void *pcpudst, const void *src, unsigned long size);
extern void setup_per_cpu_areas (void);
extern void *per_cpu_init(void);

Index: linux-2.6/include/asm-powerpc/percpu.h
===================================================================
--- linux-2.6.orig/include/asm-powerpc/percpu.h 2007-11-21 13:14:21.754859049 -0800
+++ linux-2.6/include/asm-powerpc/percpu.h 2007-11-21 13:14:33.651108379 -0800
@@ -30,15 +30,6 @@
#define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __my_cpu_offset()))
#define __raw_get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, local_paca->data_offset))

-/* A macro to avoid #include hell... */
-#define percpu_modcopy(pcpudst, src, size) \
-do { \
- unsigned int __i; \
- for_each_possible_cpu(__i) \
- memcpy((pcpudst)+__per_cpu_offset(__i), \
- (src), (size)); \
-} while (0)
-
extern void setup_per_cpu_areas(void);

#else /* ! SMP */
Index: linux-2.6/include/asm-s390/percpu.h
===================================================================
--- linux-2.6.orig/include/asm-s390/percpu.h 2007-11-21 13:14:39.835108493 -0800
+++ linux-2.6/include/asm-s390/percpu.h 2007-11-21 13:14:48.590858137 -0800
@@ -51,15 +51,6 @@ extern unsigned long __per_cpu_offset[NR
#define per_cpu(var,cpu) __reloc_hide(var,__per_cpu_offset[cpu])
#define per_cpu_offset(x) (__per_cpu_offset[x])

-/* A macro to avoid #include hell... */
-#define percpu_modcopy(pcpudst, src, size) \
-do { \
- unsigned int __i; \
- for_each_possible_cpu(__i) \
- memcpy((pcpudst)+__per_cpu_offset[__i], \
- (src), (size)); \
-} while (0)
-
#else /* ! SMP */

#define DEFINE_PER_CPU(type, name) \
Index: linux-2.6/include/asm-sparc64/percpu.h
===================================================================
--- linux-2.6.orig/include/asm-sparc64/percpu.h 2007-11-21 13:15:04.043858836 -0800
+++ linux-2.6/include/asm-sparc64/percpu.h 2007-11-21 13:15:11.330973138 -0800
@@ -30,14 +30,6 @@ extern unsigned long __per_cpu_shift;
#define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __local_per_cpu_offset))
#define __raw_get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __local_per_cpu_offset))

-/* A macro to avoid #include hell... */
-#define percpu_modcopy(pcpudst, src, size) \
-do { \
- unsigned int __i; \
- for_each_possible_cpu(__i) \
- memcpy((pcpudst)+__per_cpu_offset(__i), \
- (src), (size)); \
-} while (0)
#else /* ! SMP */

#define real_setup_per_cpu_areas() do { } while (0)
Index: linux-2.6/include/asm-x86/percpu_32.h
===================================================================
--- linux-2.6.orig/include/asm-x86/percpu_32.h 2007-11-21 13:15:19.947608444 -0800
+++ linux-2.6/include/asm-x86/percpu_32.h 2007-11-21 13:15:26.562798940 -0800
@@ -74,15 +74,6 @@ DECLARE_PER_CPU(unsigned long, this_cpu_

#define __get_cpu_var(var) __raw_get_cpu_var(var)

-/* A macro to avoid #include hell... */
-#define percpu_modcopy(pcpudst, src, size) \
-do { \
- unsigned int __i; \
- for_each_possible_cpu(__i) \
- memcpy((pcpudst)+__per_cpu_offset[__i], \
- (src), (size)); \
-} while (0)
-
#define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
#define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)

Index: linux-2.6/include/asm-x86/percpu_64.h
===================================================================
--- linux-2.6.orig/include/asm-x86/percpu_64.h 2007-11-21 13:15:29.222858444 -0800
+++ linux-2.6/include/asm-x86/percpu_64.h 2007-11-21 13:15:34.703108217 -0800
@@ -36,15 +36,6 @@
extern int simple_identifier_##var(void); \
RELOC_HIDE(&per_cpu__##var, __my_cpu_offset()); }))

-/* A macro to avoid #include hell... */
-#define percpu_modcopy(pcpudst, src, size) \
-do { \
- unsigned int __i; \
- for_each_possible_cpu(__i) \
- memcpy((pcpudst)+__per_cpu_offset(__i), \
- (src), (size)); \
-} while (0)
-
extern void setup_per_cpu_areas(void);

#else /* ! SMP */
Index: linux-2.6/kernel/module.c
===================================================================
--- linux-2.6.orig/kernel/module.c 2007-11-21 13:18:06.743108472 -0800
+++ linux-2.6/kernel/module.c 2007-11-21 13:23:29.394688088 -0800
@@ -423,6 +423,14 @@ static unsigned int find_pcpusec(Elf_Ehd
return find_sec(hdr, sechdrs, secstrings, ".data.percpu");
}

+static void percpu_modcopy(void *pcpudest, const void *from, unsigned long size)
+{
+ int cpu;
+
+ for_each_possible_cpu(cpu)
+ memcpy(pcpudest + per_cpu_offset(cpu), from, size);
+}
+
static int percpu_modinit(void)
{
pcpu_num_used = 2;

--