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From: Andi Kleen <andi@firstfloor.org>
To: x86@kernel.org
Cc: linux-kernel@vger.kernel.org, Andi Kleen <ak@linux.intel.com>,
	tj@kernel.org
Subject: [PATCH 1/7] percpu: Add a DEFINE_PER_CPU_2PAGE_ALIGNED
Date: Mon, 28 Apr 2014 15:12:35 -0700	[thread overview]
Message-ID: <1398723161-21968-2-git-send-email-andi@firstfloor.org> (raw)
In-Reply-To: <1398723161-21968-1-git-send-email-andi@firstfloor.org>

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 a5fc7d0..5b2f5b0 100644
--- a/include/linux/percpu-defs.h
+++ b/include/linux/percpu-defs.h
@@ -142,6 +142,10 @@
 	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.
  */
-- 
1.9.0


  reply	other threads:[~2014-04-28 22:14 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-04-28 22:12 Add support for RD/WR FS/GSBASE Andi Kleen
2014-04-28 22:12 ` Andi Kleen [this message]
2014-05-02 15:18   ` [PATCH 1/7] percpu: Add a DEFINE_PER_CPU_2PAGE_ALIGNED Tejun Heo
2014-04-28 22:12 ` [PATCH 2/7] x86: Naturally align the debug IST stack Andi Kleen
2014-04-28 22:12 ` [PATCH 3/7] x86: Add C intrinsics for new rd/wr fs/gs base instructions Andi Kleen
2014-04-29 14:10   ` Konrad Rzeszutek Wilk
2014-04-28 22:12 ` [PATCH 4/7] x86: Add support for rd/wr fs/gs base Andi Kleen
2014-04-29 18:19   ` Andy Lutomirski
2014-04-29 23:39     ` Andi Kleen
2014-04-30  4:52       ` H. Peter Anvin
2014-04-30  4:57         ` H. Peter Anvin
2014-04-30 23:44         ` Andy Lutomirski
2014-04-30 23:47           ` Andy Lutomirski
2014-05-01 21:15           ` Andi Kleen
2014-05-01 21:39             ` Andy Lutomirski
2014-05-01 21:51               ` Andi Kleen
2014-05-01 21:53                 ` Andy Lutomirski
2014-05-01 21:58             ` H. Peter Anvin
2014-05-01 22:06               ` Andy Lutomirski
2014-05-01 22:18               ` Andi Kleen
2014-05-01 22:45                 ` H. Peter Anvin
2014-04-28 22:12 ` [PATCH 5/7] x86: Make old K8 swapgs workaround conditional Andi Kleen
2014-04-30  4:57   ` H. Peter Anvin
2014-04-28 22:12 ` [PATCH 6/7] x86: Enumerate kernel FSGS capability in AT_HWCAP2 Andi Kleen
2014-04-28 22:12 ` [PATCH 7/7] x86: Add documentation for rd/wr fs/gs base Andi Kleen
2014-04-29  2:23   ` Randy Dunlap

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