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| author | Alexander van Heukelum <heukelum@fastmail.fm> | 2010-09-06 20:53:42 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-09-07 05:07:00 +0200 |
| commit | fe8e0c25cad28e8858ecfa5863333c70685a6811 (patch) | |
| tree | d1abdb267151a1a9bca7dc48904b60025a24d8b8 /include/linux | |
| parent | 1813a68457bb45b378d5bbec615b167deff3bcfc (diff) | |
| download | linux-fe8e0c25cad28e8858ecfa5863333c70685a6811.tar.gz linux-fe8e0c25cad28e8858ecfa5863333c70685a6811.tar.bz2 linux-fe8e0c25cad28e8858ecfa5863333c70685a6811.zip | |
x86, 32-bit: Align percpu area and irq stacks to THREAD_SIZE
The irq stacks, located in the percpu-area, need to be
THREAD_SIZE aligned. Add the infrastucture to align percpu
variables to larger-than-pagesize amounts within the percpu
area, and use it to specify the alignment for the irq stacks.
Also align the percpu area itself to THREAD_SIZE.
This should make irq stacks work with 8K THREAD_SIZE.
Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Cc: Tejun Heo <tj@kernel.org>
Cc: hch@lst.de
LKML-Reference: <1283799222.15941.1393621887@webmail.messagingengine.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/percpu-defs.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/percpu-defs.h b/include/linux/percpu-defs.h index ce2dc655cd1d..ab20d119a85d 100644 --- a/include/linux/percpu-defs.h +++ b/include/linux/percpu-defs.h @@ -139,6 +139,18 @@ __aligned(PAGE_SIZE) /* + * Declaration/definition used for large per-CPU variables that must be + * aligned to something larger than the pagesize. + */ +#define DECLARE_PER_CPU_MULTIPAGE_ALIGNED(type, name, size) \ + DECLARE_PER_CPU_SECTION(type, name, "..page_aligned") \ + __aligned(size) + +#define DEFINE_PER_CPU_MULTIPAGE_ALIGNED(type, name, size) \ + DEFINE_PER_CPU_SECTION(type, name, "..page_aligned") \ + __aligned(size) + +/* * Intermodule exports for per-CPU variables. sparse forgets about * address space across EXPORT_SYMBOL(), change EXPORT_SYMBOL() to * noop if __CHECKER__. |