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authorJeremy Fitzhardinge <jeremy@goop.org>2007-05-02 13:27:11 -0400
committerAndi Kleen <andi@basil.nowhere.org>2007-05-02 13:27:11 -0400
commitb00742d399513a4100c24cc2accefdc1bb1e0b15 (patch)
tree57551a08eb218ed4aadb0a90806f33826df27f8a /include/linux/percpu.h
parentbbba11c35baaad3f70f32e185a2c1d40d7901fe9 (diff)
[PATCH] x86-64: Account for module percpu space separately from kernel percpu
Rather than using a single constant PERCPU_ENOUGH_ROOM, compute it as the sum of kernel_percpu + PERCPU_MODULE_RESERVE. This is now common to all architectures; if an architecture wants to set PERCPU_ENOUGH_ROOM to something special, then it may do so (ia64 is the only one which does). Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Andi Kleen <ak@suse.de>
Diffstat (limited to 'include/linux/percpu.h')
-rw-r--r--include/linux/percpu.h9
1 files changed, 8 insertions, 1 deletions
diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index 600e3d387ffc..b72be2f79e6a 100644
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -11,9 +11,16 @@
11 11
12/* Enough to cover all DEFINE_PER_CPUs in kernel, including modules. */ 12/* Enough to cover all DEFINE_PER_CPUs in kernel, including modules. */
13#ifndef PERCPU_ENOUGH_ROOM 13#ifndef PERCPU_ENOUGH_ROOM
14#define PERCPU_ENOUGH_ROOM 32768 14#ifdef CONFIG_MODULES
15#define PERCPU_MODULE_RESERVE 8192
16#else
17#define PERCPU_MODULE_RESERVE 0
15#endif 18#endif
16 19
20#define PERCPU_ENOUGH_ROOM \
21 (__per_cpu_end - __per_cpu_start + PERCPU_MODULE_RESERVE)
22#endif /* PERCPU_ENOUGH_ROOM */
23
17/* 24/*
18 * Must be an lvalue. Since @var must be a simple identifier, 25 * Must be an lvalue. Since @var must be a simple identifier,
19 * we force a syntax error here if it isn't. 26 * we force a syntax error here if it isn't.