From: Andi Kleen <andi@firstfloor.org>
To: linux-kernel@vger.kernel.org
Cc: x86@kernel.org, Andi Kleen <ak@linux.intel.com>, tj@kernel.org
Subject: [PATCH 1/8] percpu: Add a DEFINE_PER_CPU_2PAGE_ALIGNED
Date: Tue, 14 Oct 2014 22:11:44 -0700 [thread overview]
Message-ID: <1413349911-3620-1-git-send-email-andi@firstfloor.org> (raw)
From: Andi Kleen <ak@linux.intel.com>
Needed in a followon patch which needs to naturally align a 8K stack.
I just put it into the page aligned section. This may cause an extra
4K hole if we're unlucky.
Cc: tj@kernel.org
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
include/linux/percpu-defs.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/include/linux/percpu-defs.h b/include/linux/percpu-defs.h
index cfd5604..e6e7f38 100644
--- a/include/linux/percpu-defs.h
+++ b/include/linux/percpu-defs.h
@@ -163,6 +163,10 @@
DEFINE_PER_CPU_SECTION(type, name, "..page_aligned") \
__aligned(PAGE_SIZE)
+#define DEFINE_PER_CPU_2PAGE_ALIGNED(type, name) \
+ DEFINE_PER_CPU_SECTION(type, name, "..page_aligned") \
+ __aligned(2*PAGE_SIZE)
+
/*
* Declaration/definition used for per-CPU variables that must be read mostly.
*/
--
1.9.3
next reply other threads:[~2014-10-15 5:11 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-15 5:11 Andi Kleen [this message]
2014-10-15 5:11 ` [PATCH 2/8] x86: Naturally align the debug IST stack Andi Kleen
2014-10-15 5:11 ` [PATCH 3/8] x86: Add intrinsics/macros for new rd/wr fs/gs base instructions Andi Kleen
2014-10-15 5:11 ` [PATCH 4/8] x86: Add support for rd/wr fs/gs base Andi Kleen
2014-10-15 5:11 ` [PATCH 5/8] x86: Make old K8 swapgs workaround conditional Andi Kleen
2014-10-15 5:11 ` [PATCH 6/8] x86: Enumerate kernel FSGS capability in AT_HWCAP2 Andi Kleen
2014-10-15 5:11 ` [PATCH 7/8] x86: Add documentation for rd/wr fs/gs base Andi Kleen
2014-10-20 20:28 ` Konrad Rzeszutek Wilk
2014-10-15 5:11 ` [PATCH 8/8] x86: Use rd/wr fs/gs base in arch_prctl Andi Kleen
2014-10-27 15:00 ` [PATCH 1/8] percpu: Add a DEFINE_PER_CPU_2PAGE_ALIGNED Tejun Heo
2014-11-10 23:55 Andi Kleen
2015-04-10 15:50 Updated RD/WRFS/GSBASE patchkit Andi Kleen
2015-04-10 15:50 ` [PATCH 1/8] percpu: Add a DEFINE_PER_CPU_2PAGE_ALIGNED Andi Kleen
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