From: Rusty Russell <rusty@rustcorp.com.au>
To: akpm@zip.com.au
Cc: linux-kernel@vger.kernel.org,
David Mosberger-Tang <davidm@hpl.hp.com>,
Dipankar Sarma <dipankar@in.ibm.com>
Subject: [PATCH 2/3] Per-cpu SMP unification
Date: Tue, 20 May 2003 11:23:46 +1000 [thread overview]
Message-ID: <20030520013131.294E42C082@lists.samba.org> (raw)
[ Untested on ia64, but fairly trivial if I've broken something ].
Name: Unification of per-cpu headers for SMP
Author: Rusty Russell
Status: Trivial
Depends: Misc/percpu-up-unify.patch.gz
D: There's really only one sane way to implement accessing other CPU's
D: variables, there's no real reason for archs to use a method other
D: than __per_cpu_offset[], so move that from asm-*/percpu.h to
D: linux/percpu.h.
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .14538-linux-2.5.69-bk13/include/asm-generic/percpu.h .14538-linux-2.5.69-bk13.updated/include/asm-generic/percpu.h
--- .14538-linux-2.5.69-bk13/include/asm-generic/percpu.h 2003-05-19 15:08:47.000000000 +1000
+++ .14538-linux-2.5.69-bk13.updated/include/asm-generic/percpu.h 2003-05-19 15:08:48.000000000 +1000
@@ -5,16 +5,12 @@
#define __GENERIC_PER_CPU
#ifdef CONFIG_SMP
-extern unsigned long __per_cpu_offset[NR_CPUS];
-
/* Separate out the type, so (int[3], foo) works. */
#ifndef MODULE
#define DEFINE_PER_CPU(type, name) \
__attribute__((__section__(".data.percpu"))) __typeof__(type) name##__per_cpu
#endif
-/* var is in discarded region: offset to particular copy we want */
-#define per_cpu(var, cpu) (*RELOC_HIDE(&var##__per_cpu, __per_cpu_offset[cpu]))
#define __get_cpu_var(var) per_cpu(var, smp_processor_id())
#endif /* SMP */
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .14538-linux-2.5.69-bk13/include/asm-ia64/percpu.h .14538-linux-2.5.69-bk13.updated/include/asm-ia64/percpu.h
--- .14538-linux-2.5.69-bk13/include/asm-ia64/percpu.h 2003-05-19 15:08:47.000000000 +1000
+++ .14538-linux-2.5.69-bk13.updated/include/asm-ia64/percpu.h 2003-05-19 15:08:48.000000000 +1000
@@ -18,15 +18,12 @@
#include <linux/threads.h>
#ifdef CONFIG_SMP
-extern unsigned long __per_cpu_offset[NR_CPUS];
-
#ifndef MODULE
#define DEFINE_PER_CPU(type, name) \
__attribute__((__section__(".data.percpu"))) __typeof__(type) name##__per_cpu
#endif
#define __get_cpu_var(var) (var##__per_cpu)
-#define per_cpu(var, cpu) (*RELOC_HIDE(&var##__per_cpu, __per_cpu_offset[cpu]))
#endif /* CONFIG_SMP */
extern void setup_per_cpu_areas (void);
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .14538-linux-2.5.69-bk13/include/linux/percpu.h .14538-linux-2.5.69-bk13.updated/include/linux/percpu.h
--- .14538-linux-2.5.69-bk13/include/linux/percpu.h 2003-05-19 15:08:47.000000000 +1000
+++ .14538-linux-2.5.69-bk13.updated/include/linux/percpu.h 2003-05-19 15:08:48.000000000 +1000
@@ -10,6 +10,10 @@
#ifdef CONFIG_SMP
+/* var is in discarded region: offset to particular copy we want */
+#define per_cpu(var, cpu) (*RELOC_HIDE(&var##__per_cpu, __per_cpu_offset[cpu]))
+extern unsigned long __per_cpu_offset[NR_CPUS];
+
struct percpu_data {
void *ptrs[NR_CPUS];
void *blkp;
--
Anyone who quotes me in their sig is an idiot. -- Rusty Russell.
reply other threads:[~2003-05-20 1:18 UTC|newest]
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