[PATCH] per-cpu patch 1/3

[PATCH] per-cpu patch 1/3

[Rusty Russell]

Name: Export __per_cpu_offset so modules can use per-cpu data.
Author: Rusty Russell
Status: Trivial

D: As per Andrew Morton's request.

diff -urN -I \$.*\$ --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.5.25/kernel/ksyms.c working-2.5.25-percpu/kernel/ksyms.c
--- linux-2.5.25/kernel/ksyms.c	Sun Jul  7 02:12:24 2002
+++ working-2.5.25-percpu/kernel/ksyms.c	Fri Jul 12 16:03:47 2002
@@ -50,6 +50,7 @@
 #include <linux/namei.h>
 #include <linux/buffer_head.h>
 #include <linux/root_dev.h>
+#include <linux/percpu.h>
 #include <asm/checksum.h>
 
 #if defined(CONFIG_PROC_FS)
@@ -597,3 +598,6 @@
 
 EXPORT_SYMBOL(tasklist_lock);
 EXPORT_SYMBOL(pidhash);
+#if defined(CONFIG_SMP) && defined(__GENERIC_PER_CPU)
+EXPORT_SYMBOL(__per_cpu_offset);
+#endif

--
  Anyone who quotes me in their sig is an idiot. -- Rusty Russell.

Re: [PATCH] per-cpu patch 1/3

[Andrew Morton]

Rusty Russell wrote:
> 
> Name: Export __per_cpu_offset so modules can use per-cpu data.

ie: so modules can access per-cpu data which is defined in
vmlinux.  afaik, modules cannot define percpu.h-style per-cpu
storage of their own, yes?

That's rather a trap.  It would be nice to ensure that any
attempt to define per-cpu data in a module fails reliably
at compile-time, please.

-

Re: [PATCH] per-cpu patch 1/3

[Rusty Russell]

In message <3D3B7532.96B78172@zip.com.au> you write:
> Rusty Russell wrote:
> > 
> > Name: Export __per_cpu_offset so modules can use per-cpu data.
> 
> ie: so modules can access per-cpu data which is defined in
> vmlinux.  afaik, modules cannot define percpu.h-style per-cpu
> storage of their own, yes?
> 
> That's rather a trap.  It would be nice to ensure that any
> attempt to define per-cpu data in a module fails reliably
> at compile-time, please.

See patch 3/3.

Cheers!
Rusty.
--
  Anyone who quotes me in their sig is an idiot. -- Rusty Russell.